結果
| 問題 | No.750 Frac #1 |
| ユーザー |
 otamay6
|
| 提出日時 | 2019-09-06 20:28:03 |
| 言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 29,046 bytes |
| コンパイル時間 | 2,200 ms |
| コンパイル使用メモリ | 202,052 KB |
| 実行使用メモリ | 6,948 KB |
| 最終ジャッジ日時 | 2024-06-24 12:05:21 |
| 合計ジャッジ時間 | 3,451 ms |
|
ジャッジサーバーID （参考情報） |
judge1 / judge3 |
（要ログイン）
テストケース
テストケース表示| 入力 | 結果 | 実行時間 実行使用メモリ |
|---|---|---|
| testcase_00 | AC | 2 ms
6,812 KB |
| testcase_01 | AC | 2 ms
6,944 KB |
| testcase_02 | WA | - |
| testcase_03 | AC | 2 ms
6,940 KB |
| testcase_04 | AC | 2 ms
6,940 KB |
| testcase_05 | AC | 2 ms
6,940 KB |
| testcase_06 | WA | - |
| testcase_07 | AC | 2 ms
6,940 KB |
| testcase_08 | AC | 1 ms
6,944 KB |
| testcase_09 | AC | 2 ms
6,944 KB |
| testcase_10 | AC | 2 ms
6,944 KB |
| testcase_11 | WA | - |
| testcase_12 | AC | 2 ms
6,944 KB |
| testcase_13 | AC | 2 ms
6,940 KB |
| testcase_14 | AC | 2 ms
6,940 KB |
| testcase_15 | AC | 2 ms
6,944 KB |
| testcase_16 | AC | 1 ms
6,940 KB |
| testcase_17 | AC | 1 ms
6,940 KB |
| testcase_18 | WA | - |
| testcase_19 | WA | - |
| testcase_20 | AC | 2 ms
6,940 KB |
| testcase_21 | AC | 2 ms
6,944 KB |
| testcase_22 | AC | 2 ms
6,940 KB |
| testcase_23 | AC | 2 ms
6,944 KB |
| testcase_24 | WA | - |
| testcase_25 | AC | 2 ms
6,940 KB |
| testcase_26 | WA | - |
| testcase_27 | AC | 2 ms
6,940 KB |
| testcase_28 | AC | 2 ms
6,944 KB |
| testcase_29 | AC | 2 ms
6,940 KB |
| testcase_30 | AC | 2 ms
6,944 KB |
| testcase_31 | WA | - |
| testcase_32 | WA | - |
ソースコード
#include <bits/stdc++.h>
#define REP(i,n) for(int i=0,i##_len=(n);i<i##_len;++i)
#define RREP(i,n) for(int i=int(n)-1;i>=0;--i)
#define rep(i,a,b) for(int i=int(a);i<int(b);++i)
#define rrep(i,a,b) for(int i=int(a)-1;i>=int(b);--i)
#define All(x) (x).begin(),(x).end()
#define rAll(x) (x).rbegin(),(x).rend()
#define ITR(i,x) for(auto i=(x).begin();i!=(x).end();++i)
using namespace std;
using Graph = vector<vector<int>>;
typedef long long ll;
typedef pair<ll, ll> P;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<ll> vl;
typedef vector<vl> vvl;
constexpr ll mod = 1e9+7;
constexpr double eps = 1e-9;
const double PI = acos(-1);
void solve();
P bisearch(ll l,ll r,function<bool(ll)> f){
while((l+1)<r){
ll m=(l+r)/2;
if(f(m)) r=m;
else l=m;
}
return P(l,r);
}
ll SQRT(ll n){if(n==1) return 1;return bisearch(0,n,[n](ll x){return x>n/x;}).first;}
ll roundup(ll n,ll div){
if(n>0) return (n-1)/div+1;
else return n/div;
}
bool square(ll a){ll n=SQRT(a);return a==n*n;}
ll npow(ll x, ll n){
ll ans = 1;
while(n != 0){
if(n&1) ans = ans*x;
x = x*x;
n = n >> 1;
}
return ans;
}
ll mpow(ll x, ll n){ //x^n(mod) ←普通にpow(x,n)では溢れてしまうため，随時mod計算 2分累乗法だから早い
ll ans = 1;
while(n != 0){
if(n&1) ans = ans*x % mod;
x = x*x % mod;
n = n >> 1;
}
return ans;
}
ll inv_mod(ll a){return mpow(a,mod-2);}
int digitsum(ll N,int a){
if(N==0) return 0;
int ret=0;
ret+=digitsum(N/a,a)+N%a;
return ret;
}
ll gcd(ll x,ll y){return y ? gcd(y,x%y) : x;};//xとyの最大公約数
ll lcm(ll x,ll y){return x/gcd(x,y)*y;}//xとyの最小公倍数
void YN(bool flg){std::cout<<(flg?"YES":"NO")<<endl;}
void Yn(bool flg){std::cout<<(flg?"Yes":"No")<<endl;}
void yn(bool flg){std::cout<<(flg?"yes":"no")<<endl;}
P splitint(string n,int a){
int Len=n.length();
if(a<0||Len<a) return {-1,-1};
string left,right;
if(a!=0) left=n.substr(0,a);
if(a!=Len) right=n.substr(a);
return P(stoll(left),stoll(right));
}
ll manhattan(const P &a,const P &b){return llabs(a.first-b.first)+llabs(a.second-b.second);}
bool kaibun(string s){//O(|S|)
string sdash=s;
reverse(All(s));
return s==sdash;
}
class Ruiseki{
private:
vector<ll> LEFT,RIGHT;
function<ll(ll,ll)> F;
int N;
public:
Ruiseki(ll INI,const vector<ll> &a,function<ll(ll,ll)> f){
N=a.size();F=f;
LEFT.resize(N+1);RIGHT.resize(N+1);
LEFT[0]=RIGHT[0]=INI;
REP(i,N){
LEFT[i+1]=F(LEFT[i],a[i]);
RIGHT[i+1]=F(RIGHT[i],a[N-i-1]);
}
}
ll out(int l,int r){//[l,r)の外の累積
return F(LEFT[l],RIGHT[N-r]);
}
};
class mint {
private:
ll _num,_mod;
mint set(ll num){
_num = num ;
if(_num>=0) _num%=_mod;
else _num+=(1-(_num+1)/_mod)*_mod;
return *this;
}
ll _mpow(ll x, ll n){ //x^n(mod) ←普通にpow(x,n)では溢れてしまうため，随時mod計算 2分累乗法だから早い
ll ans = 1;
while(n != 0){
if(n&1) ans = ans*x % _mod;
x = x*x % _mod;
n = n >> 1;
}
return ans;
}
ll imod(ll n){return _mpow(n , _mod-2);}
public:
mint(){ _num = 0;_mod=mod; }
mint(ll num){ _mod = mod; _num = (num+(1LL<<25)*mod) % mod; }
mint(ll num,ll M){ _mod=M;_num=(num+(1LL<<25)*mod)%_mod; }
mint(const mint &cp){_num=cp._num;_mod=cp._mod;}
mint operator= (const ll x){ return set(x); }
mint operator+ (const ll x){ return mint(_num + (x % _mod) , _mod); }
mint operator- (const ll x){ return mint(_num - (x % _mod), _mod); }
mint operator* (const ll x){ return mint(_num * (x % _mod) , _mod); }
mint operator/ (ll x){ return mint(_num * imod(x) , _mod);}
mint operator+=(const ll x){ return set(_num + (x % _mod)); }
mint operator-=(const ll x){ return set(_num - (x % _mod)); }
mint operator*=(const ll x){ return set(_num * (x % _mod)); }
mint operator/=(ll x){ return set(_num * imod(x));}
mint operator+ (const mint &x){ return mint(_num + x._num , _mod); }
mint operator- (const mint &x){ return mint(_num - x._num , _mod);}
mint operator* (const mint &x){ return mint(_num * x._num , _mod); }
mint operator/ (mint x){ return mint(_num * imod(x._num) , _mod);}
mint operator+=(const mint &x){ return set(_num + x._num); }
mint operator-=(const mint &x){ return set(_num - x._num); }
mint operator*=(const mint &x){ return set(_num * x._num); }
mint operator/=(mint x){ return set(_num * imod(x._num));}
bool operator<(const mint &x)const{return _num<x._num;}
bool operator==(const mint &x)const{return _num==x._num;}
bool operator>(const mint &x)const{return _num>x._num;}
friend mint operator+(ll x,const mint &m){return mint(m._num + (x % m._mod) , m._mod);}
friend mint operator-(ll x,const mint &m){return mint( (x % m._mod) - m._num , m._mod);}
friend mint operator*(ll x,const mint &m){return mint(m._num * (x % m._mod) , m._mod);}
friend mint operator/(ll x,mint m){return mint(m.imod(m._num) * x , m._mod);}
explicit operator ll() { return _num; }
explicit operator int() { return (int)_num; }
friend ostream& operator<<(ostream &os, const mint &x){ os << x._num; return os; }
friend istream& operator>>(istream &is, mint &x){ll val; is>>val; x.set(val); return is;}
};
template<typename T> class MAT{
private:
int row,col;
vector<vector<T>> _A;
MAT set(vector<vector<T>> A){_A = A ; return *this;}
public:
MAT(){ }
MAT(int n,int m){
if(n<1 || m<0){cout << "err Matrix::Matrix" <<endl;exit(1);}
row = n;
col = m?m:n;//m=0のとき単位行列を作る
REP(i,row){
vector<T> a(col,0.0);
_A.push_back(a);
}
// 値の初期化
if(m==0) REP(i,n) _A[i][i]=1.0;
}
MAT(const MAT &cp){_A=cp._A;row=cp.row;col=cp.col;}
T* operator[] (int i){return _A[i].data();}
MAT operator= (vector<vector<T>> x) {return set(x);}
MAT operator+ (MAT x) {
if(row!=x.row || col!=x.col){
cout << "err Matrix::operator+" <<endl;
cout << " not equal matrix size" <<endl;
exit(0);
}
MAT r(row, col);
REP(i,row) REP(j,col) r[i][j]=_A[i][j]+x[i][j];
return r;
}
MAT operator- (MAT x) {
if(row!=x.row || col!=x.col){
cout << "err Matrix::operator-" <<endl;
cout << " not equal matrix size" <<endl;
exit(0);
}
MAT r(row, col);
REP(i,row) REP(j,col) r[i][j]=_A[i][j]-x[i][j];
return r;
}
MAT operator* (MAT x) {
if(col!=x.row){
cout << "err Matrix::operator*" <<endl;
cout << " not equal matrix size" <<endl;
exit(0);
}
MAT r(row, x.col);
REP(i,row) REP(j,x.col) REP(k,col) r[i][j]+=_A[i][k]*x[k][j];
return r;
}
MAT operator/ (T a){
MAT r(row,col);
REP(i,row) REP(j,col) r[i][j]=_A[i][j]/a;
return r;
}
MAT operator^ (ll n){
if(row!=col){
cout << "err Matrix::operator^" <<endl;
cout << " not equal matrix size" <<endl;
exit(0);
}
MAT r(row,0),A=*this;
while(n){
if(n&1) r *= A;
A*=A;
n>>=1;
}
return r;
}
MAT operator+= (MAT x) {
if(row!=x.row || col!=x.col){
cout << "err Matrix::operator+=" <<endl;
cout << " not equal matrix size" <<endl;
exit(0);
}
MAT r(row, col);
REP(i,row) REP(j,col) r[i][j]=_A[i][j]+x[i][j];
return set(r._A);
}
MAT operator-= (MAT x) {
if(row!=x.row || col!=x.col){
cout << "err Matrix::operator-=" <<endl;
cout << " not equal matrix size" <<endl;
exit(0);
}
MAT r(row, col);
REP(i,row) REP(j,col) r[i][j]=_A[i][j]-x[i][j];
return set(r._A);
}
MAT operator*= (MAT x) {
if(col!=x.row){
cout << "err Matrix::operator*" <<endl;
cout << " not equal matrix size" <<endl;
exit(0);
}
MAT r(row, x.col);
REP(i,row) REP(j,x.col) REP(k,col) r[i][j]+=_A[i][k]*x[k][j];
return set(r._A);
}
MAT operator/=(T a){
MAT r(row,col);
REP(i,row) REP(j,col) r[i][j]=_A[i][j]/a;
return r;
}
friend MAT operator* (T n,MAT x){
MAT r(x.row,x.col);
REP(i,x.row) REP(j,x.col) r[i][j]=n*x[i][j];
return r;
}
friend MAT operator* (MAT x,T n){
MAT r(x.row,x.col);
REP(i,x.row) REP(j,x.col) r[i][j]=n*x[i][j];
return r;
}
explicit operator vector<vector<T>>(){return _A;}
friend ostream &operator<<(ostream &os,const MAT &x){ REP(i,x.row) REP(j,x.col) os<<x._A[i][j]<<" \n"[j==x.col-1]; return os;}
friend istream &operator>>(istream &is,MAT &x){REP(i,x.row) REP(j,x.col) is>>x._A[i][j];return is;}
int size_row(){return row;}
int size_col(){return col;}
MAT transpose(){
MAT r(col,row);
REP(i,col) REP(j,row) r[i][j]=_A[j][i];
return r;
}
MAT inverse(){
T buf;
MAT<T> inv_a(row,0);
vector<vector<T>> a=_A;
//掃き出し法
REP(i,row){
buf=1/a[i][i];
REP(j,row){
a[i][j]*=buf;
inv_a[i][j]*=buf;
}
REP(j,row){
if(i!=j){
buf=a[j][i];
REP(k,row){
a[j][k]-=a[i][k]*buf;
inv_a[j][k]-=inv_a[i][k]*buf;
}
}
}
}
return inv_a;
}
// O( n^3 ).
int rank() {
vector<vector<T>> A=_A;
const int n = row, m = col;
int r = 0;
for(int i = 0; r < n && i < m; ++i) {
int pivot = r;
for(int j = r+1; j < n; ++j) if(fabs(A[j][i]) > fabs(A[pivot][i])) pivot = j;
swap(A[pivot], A[r]);
if(fabs(A[r][i]) < eps) continue;
for (int k = m-1; k >= i; --k) A[r][k] /= A[r][i];
rep(j,r+1,n) rep(k,i,m) A[j][k] -= A[r][k] * A[j][i];
++r;
}
return r;
}
};
class UnionFind{//UnionFind木
private:
vector<int> Parent,es;
vector<ll> diff_weight;
public:
UnionFind(int N){
es.resize(N,0);
Parent.resize(N,-1);
diff_weight.resize(N,0LL);
}
int root(int A){
if(Parent[A]<0) return A;
else{
int r = root(Parent[A]);
diff_weight[A] += diff_weight[Parent[A]]; // 累積和をとる
return Parent[A]=r;
}
}
bool issame(int A,int B){
return root(A)==root(B);
}
ll weight(int x) {
root(x); // 経路圧縮
return diff_weight[x];
}
ll diff(int x, int y) {
return weight(y) - weight(x);
}
int size(int A){
return -Parent[root(A)];
}
int eize(int A){
return es[root(A)];
}
bool connect(int A,int B){
A=root(A); B=root(B);
if(A==B) return false;
if(size(A)<size(B)) swap(A,B);
Parent[A]+=Parent[B];
es[A]+=es[B]+1;
Parent[B]=A;
return true;
}
void unite(int A,int B){
A=root(A); B=root(B);
if(A==B){
es[A]++;
return;
}
if(size(A)<size(B)) swap(A,B);
Parent[A]+=Parent[B];
es[A]+=es[B]+1;
Parent[B]=A;
return;
}
bool merge(int A, int B, ll w) {
// x と y それぞれについて、 root との重み差分を補正
w += weight(A); w -= weight(B);
A=root(A); B=root(B);
if(A==B) return false;
if(size(A)<size(B)) swap(A,B),w=-w;
Parent[A]+=Parent[B];
Parent[B]=A;
// x が y の親になるので、x と y の差分を diff_weight[y] に記録
diff_weight[B] = w;
return true;
}
};
class Factorial{//階乗とその逆元を求めて計算に利用するクラス
private:
vector<ll> fac;
vector<ll> ifac;
public:
Factorial(ll N){
fac.push_back(1);
REP(i,N) fac.push_back(fac[i]*(i+1)%mod);
ifac.resize(N+1);
ifac[N]=inv_mod(fac[N]);
REP(i,N) ifac[N-1-i]=(ifac[N-i]*(N-i))%mod;
}
ll fact(ll a){return fac[a];}
ll ifact(ll a){return ifac[a];}
ll cmb(ll a,ll b){
if(a==0&&b==0) return 1;
if(a<b||a<0||b<0) return 0;
ll tmp =ifact(a-b)*ifact(b)%mod;
return tmp*fac[a]%mod;
}
ll per(ll a,ll b){
if(a==0&&b==0) return 1;
if(a<b||a<0||b<0) return 0;
return fac[a]*ifac[a-b]%mod;
}
};
class SOSU{
private:
vector<int> Prime_Number;
vector<bool> isp;
public:
SOSU(int N){
isp.resize(N+1,true);
isp[0]=isp[1]=false;
rep(i,2,N+1) if(isp[i]){
Prime_Number.push_back(i);
for(int j=2*i;j<=N;j+=i) isp[j]=false;
}
}
int operator[](int i){return Prime_Number[i];}
int size(){return Prime_Number.size();}
int back(){return Prime_Number.back();}
bool isPrime(int q){return isp[q];}
};
class Divisor{//素因数分解をしてから約数列挙、分解結果はＰ(底,指数)でpfacにまとめている
private:
vector<ll> F;
vector<P> pfactorize;
public:
Divisor(ll N){
for(ll i = 1; i * i <= N; i++) {
if(N % i == 0) {
F.push_back(i);
if(i * i != N) F.push_back(N / i);
}
}
sort(begin(F), end(F));
SOSU p(SQRT(N)+1);
REP(i,p.size()){
pfactorize.push_back(P(p[i],0));
while(N%p[i]==0){
N/=p[i];
pfactorize.back().second++;
}
if(pfactorize.size()==0) pfactorize.pop_back();
}
if(N>1) pfactorize.push_back(P(N,1));
}
int size(){return F.size();}
vector<P> pfac(){return pfactorize;}
ll operator[](int k){return F[k];}
};
struct Solutions{
ll napsack(int kinds,int MAX_W,const vl &weight,const vl &cost){
vector<vector<ll>> dp(kinds+1,vector<ll>(MAX_W+1,0));
REP(i,kinds) REP(j,MAX_W+1){
if(j<weight[i]) dp[i+1][j]=dp[i][j];
else dp[i+1][j]=max(dp[i][j],dp[i][j-weight[i]]+cost[i]);
}
return dp[kinds][MAX_W];
}
ll cost_based_napsack(int kinds,int MAX_W,const vl &weight,const vl &cost){
int MAX_V=0;
REP(i,kinds) MAX_V=max(MAX_V,(int)cost[i]);
vvl dp(kinds+1,vl(kinds*MAX_V+1,1LL<<58));
dp[0][0] = 0;
REP(i,kinds) REP(j,kinds*MAX_V+1){
if(j<cost[i]) dp[i+1][j]=dp[i][j];
else dp[i+1][j] = min(dp[i][j],dp[i][j-cost[i]]+weight[i]);
}
int res=0;
REP(i,kinds*MAX_V+1) if(dp[kinds][i]<=MAX_W) res=i;
return res;
}
ll unlimited_napsack(int kinds,int MAX_W,const vl &weight,const vl &cost){
vector<vector<ll>> dp(kinds+1,vector<ll>(MAX_W+1,0));
REP(i,kinds) REP(j,MAX_W+1){
if(j<weight[i]) dp[i+1][j]=dp[i][j];
else dp[i+1][j]=max(dp[i][j],dp[i+1][j-weight[i]]+cost[i]);
}
return dp[kinds][MAX_W];
}
ll huge_napsack(int kinds,ll MAX_W,const vl &weight,const vl &cost){
int n2=kinds/2;
vector<P> ps(1<<(kinds/2));
REP(i,1<<n2){
ll sw=0,sv=0;
REP(j,n2){
if(i>>j&1){
sw += weight[j];
sv += cost[j];
}
}
ps[i] = P(sw,sv);
}
sort(ps.begin(),ps.begin() + (1<<n2) );
int m=1;
rep(i,1,1<<n2){
if(ps[m-1].second<ps[i].second) ps[m++] = ps[i];
}
ll res=0;
REP(i,1<<(kinds-n2)){
ll sw=0,sv=0;
REP(j,kinds-n2){
if((i>>j)&1){
sw += weight[n2+j];
sv += cost[n2+j];
}
}
if(sw<=MAX_W){
ll tv = (lower_bound(ps.begin(),ps.begin()+m,P(MAX_W-sw,LLONG_MAX))-1)->second;
res = max(res,sv+tv);
}
}
return res;
}
ll choose_MonN(int N,int M,const vl &cost){
vvl dp(N+1,vl(M+1,-1LL<<58));
REP(i,N+1) dp[i][0]=0;
REP(i,N) REP(j,M){
if(j>i) break;
dp[i+1][j+1]=max(dp[i][j+1],dp[i][j]+cost[i]);
}
return dp[N][M];
}
ll Partition_Func(int n,int k){
vector<vector<ll>> dp(k+1,vector<ll> (n+1,0));
dp[0][0]=1;
rep(i,1,k+1) REP(j,n+1){
if(j-i>=0) dp[i][j]=(dp[i][j-i]+dp[i-1][j]);
else dp[i][j]=dp[i-1][j];
}
return dp[k][n];
}
int LCS(string s,string t){
int n=s.length(),m=s.length();
vector<vector<int>> dp(n+1,vector<int>(m+1));
REP(i,n) REP(j,m){
if (s[i] == t[j]) dp[i+1][j+1] = dp[i][j] + 1;
else dp[i+1][j+1] = max(dp[i][j+1], dp[i+1][j]);
}
return dp[n][m];
}
int LIS(const vector<ll> a){
int n=a.size();
ll INF=1LL<<50;
vector<ll> dp(n+1,INF);
REP(i,n) *lower_bound(All(dp),a[i])=a[i];
int k=lower_bound(All(dp),INF)-dp.begin();
return k;
}
int max_flow(int s,int t,const vector<vector<P>> &g){
struct edge_{int to,cap, rev;};
vector<bool> used(g.size(),false);
vector<vector<edge_>> G(g.size());
REP(i,g.size()) REP(j,g[i].size()){
int from = i, to = g[i][j].second;
int cap = g[i][j].first;
G[from].push_back((edge_){to,cap,(int)G[to].size()});
G[to].push_back((edge_){from,0,(int)G[from].size()-1});
}
auto dfs = [&](auto&& f,int v,int t,int fl)->int{
if(v==t) return fl;
used[v] = true;
REP(i,G[v].size()){
edge_ &e = G[v][i];
if(!used[e.to] && e.cap>0){
int d = f(f, e.to,t,min(fl,e.cap));
if(d>0){
e.cap -= d;
G[e.to][e.rev].cap += d;
return d;
}
}
}
return 0;
};
int flow=0;
while(1){
used.assign(used.size(),false);
int f = dfs(dfs,s,t,INT_MAX);
if(f==0) return flow;
flow += f;
}
}
int bipartite_matching_calculate(const Graph &g){
int V = g.size();
vi match(V,-1);
vector<bool> used(V,false);
auto dfs = [&](auto&& f,int v)->bool{
used[v]=true;
REP(i,g[v].size()){
int u = g[v][i], w = match[u];
if(w<0 || !used[w] && f(f,w)){
match[v]=u;
match[u]=v;
return true;
}
}
return false;
};
int res=0;
REP(v,V){
if(match[v] < 0){
used.assign(V,false);
if(dfs(dfs,v)) res++;
}
}
return res;
}
int bipartite_matching(int l,int r,function<bool(int,int)> F){
int V = l+r;
Graph G(V);
REP(i,l) REP(j,r) if(F(i,j)){
G[i].push_back(l+j);
G[l+j].push_back(i);
}
return bipartite_matching_calculate(G);
}
};
struct compress{
map<ll,int> zip;
vector<ll> unzip;
compress(vector<ll> x){
unzip=x;
sort(All(x));
x.erase(unique(All(x)),x.end());
REP(i,x.size()){
zip[x[i]]=i;
}
}
int operator[](int k){return zip[unzip[k]];}
};
struct edge{
int from;int to;ll cost;
void push(int a,int b,int c){
from=a;to=b;cost=c;
}
bool operator<(const edge& y) const{
if(cost!=y.cost) return cost<y.cost;
else if(to!=y.to) return to<y.to;
else return from<y.from;}
bool operator>(const edge& y) const{
if(cost!=y.cost) return cost>y.cost;
else if(to!=y.to) return to>y.to;
else return from>y.from;}
bool operator==(const edge& y) const{return *this==y;}
};
class lca {
public:
const int n = 0;
const int log2_n = 0;
std::vector<std::vector<int>> parent;
std::vector<int> depth;
lca() {}
lca(const Graph &g, int root)
: n(g.size()), log2_n(log2(n) + 1), parent(log2_n, std::vector<int>(n)), depth(n) {
dfs(g, root, -1, 0);
for (int k = 0; k + 1 < log2_n; k++) {
for (int v = 0; v < (int)g.size(); v++) {
if (parent[k][v] < 0)
parent[k + 1][v] = -1;
else
parent[k + 1][v] = parent[k][parent[k][v]];
}
}
}
void dfs(const Graph &g, int v, int p, int d) {
parent[0][v] = p;
depth[v] = d;
REP(j,g[v].size()) {
if (g[v][j] != p) dfs(g, g[v][j], v, d + 1);
}
}
int get(int u, int v) {
if (depth[u] > depth[v]) std::swap(u, v);
for (int k = 0; k < log2_n; k++) {
if ((depth[v] - depth[u]) >> k & 1) {
v = parent[k][v];
}
}
if (u == v) return u;
for (int k = log2_n - 1; k >= 0; k--) {
if (parent[k][u] != parent[k][v]) {
u = parent[k][u];
v = parent[k][v];
}
}
return parent[0][u];
}
};
template <typename T,typename E> //SegmentTree((要素数) int n_,(演算) F f,(更新) G g,(初期値) T d1)
struct SegmentTree{
typedef function<T(T,T)> F;
typedef function<T(T,E)> G;
int n;
F f;
G g;
T d1;
E d0;
vector<T> dat;
SegmentTree(){};
SegmentTree(int n_,F f,G g,T d1,
vector<T> v=vector<T>()):
f(f),g(g),d1(d1){
init(n_);
if(n_==(int)v.size()) build(n_,v);
}
void init(int n_){
n=1;
while(n<n_) n*=2;
dat.clear();
dat.resize(2*n-1,d1);
}
void build(int n_, vector<T> v){
for(int i=0;i<n_;i++) dat[i+n-1]=v[i];
for(int i=n-2;i>=0;i--)
dat[i]=f(dat[i*2+1],dat[i*2+2]);
}
void update(int k,E a){
k+=n-1;
dat[k]=g(dat[k],a);
while(k>0){
k=(k-1)/2;
dat[k]=f(dat[k*2+1],dat[k*2+2]);
}
}
inline T query(int a,int b){
T vl=d1,vr=d1;
for(int l=a+n,r=b+n;l<r;l>>=1,r>>=1) {
if(l&1) vl=f(vl,dat[(l++)-1]);
if(r&1) vr=f(dat[(--r)-1],vr);
}
return f(vl,vr);
}
};
struct GP{
double x,y;
GP(double X=0,double Y=0):x(X),y(Y){}
GP(const GP &cp){
x=cp.x;y=cp.y;
}
GP& set(double X,double Y){
x=X;y=Y;
return *this;
}
GP& operator=(const GP &p){return set(p.x , p.y);}
GP operator+(const GP &p)const{return GP(x+p.x , y+p.y);}
GP operator-(const GP &p)const{return GP(x-p.x , y-p.y);}
GP operator*(double s)const{return GP(x*s,y*s);}
GP operator/(double s)const{return GP(x/s,y/s);}
friend GP operator*(double s,const GP &r){return GP(r.x*s,r.y*s);}
friend GP operator/(double s,const GP &r){return GP(r.x/s,r.y/s);}
double operator*(GP p)const{return dot(p);}
double operator^(GP p)const{return cross(p);}
GP& operator+=(const GP &p){return set(x+p.x , y+p.y);}
GP& operator-=(const GP &p){return set(x-p.x , y-p.y);}
GP& operator*=(double s){return set(x*s,y*s);}
GP& operator/=(double s){return set(x/s,y/s);}
double dot(const GP &p)const{return x*p.x + y*p.y;}
double cross(const GP &p)const{return x*p.y-p.x*y;}
int ort()const{
if(fabs(x)<eps && fabs(y)<eps) return 0;
if(y>0) return (x>0)?1:2;
else return (x<=0)?3:4;
}
bool operator<(const GP &p)const{
int o=ort(),po=p.ort();
if(o!=po) return o<po;
else{
double cr=cross(p);
if(cr==0){
double d=norm(),pd=p.norm();
return d<pd;
}
return cr>0;
}
}
friend istream& operator>>(istream &is, GP &x){double valX,valY; is>>valX>>valY; x.set(valX,valY); return is;}
friend ostream& operator<<(ostream &os, const GP &v){ os << v.x<<" "<<v.y<<endl; return os; }
double norm2()const{return x*x+y*y;}
double norm()const{return sqrt(norm2());}
double rad()const{
if(x==0){
if(y>0) return PI/2.0;
if(y==0) return -1.0;
if(y<0) return -PI/2.0;
}else{
if(y==0){
if(x<0) return PI;
if(x>0) return 0.0;
}
else return atan2(y,x);
}
}
void rotate(double theta){
double X=x,Y=y;
x=cos(theta)*X-sin(theta)*Y;
y=sin(theta)*X+cos(theta)*Y;
}
};
struct Line{
GP A,B;
Line(GP p1=GP(0,0),GP p2=GP(1,1)):A(p1),B(p2){}
double len()const{return (B-A).norm();}
GP shortest_point(const GP &x)const{
double a=B.x-A.x,b=B.y-A.y;
double t=-(a*(A.x-x.x)+b*(A.y-x.y))/(a*a+b*b);
return GP(a*t+A.x,b*t+A.y);
}
double dist(const GP &x)const{
return (x-shortest_point(x)).norm();
}
bool online(const GP &x)const{
return ((B-A)^(x-A))==0&&(x-A).norm()<=len()&&(x-B).norm()<=len();
}
friend istream& operator>>(istream &is, Line &x){GP X,Y; is>>X>>Y;x.A=X;x.B=Y;return is;}
friend ostream& operator<<(ostream &os, const Line &x){ os << x.A << x.B; return os; }
};
struct Triangle{
GP a,b,c;
Triangle(GP p1=GP(0,0),GP p2=GP(1,0),GP p3=(0,1)):a(p1),b(p2),c(p3){}
double A()const{double res=fabs((b-a).rad()-(c-a).rad());if(res>=PI) res-=PI;return res;}
double B()const{double res=fabs((a-b).rad()-(c-b).rad());if(res>=PI) res-=PI;return res;}
double C()const{double res=fabs((a-c).rad()-(b-c).rad());if(res>=PI) res-=PI;return res;}
Line AB()const{return Line(a,b);}
Line BC()const{return Line(b,c);}
Line CA()const{return Line(c,a);}
GP G()const{return (a+b+c)/3;}
GP O()const{return (sin(2*A())*a+sin(2*B())*b+sin(2*C())*c)/(sin(2*A())+sin(2*B())+sin(2*C()));}
double R()const{return a.norm()/(2*sin(A()));}
GP I()const{return (a.norm()*a+b.norm()*b+c.norm()*c)/(a.norm()+b.norm()+c.norm());}
double r()const{return 2*area()/((a-b).norm()+(b-c).norm()+(c-a).norm());}
GP H()const{return (tan(A())*a+tan(B())*b+tan(C())*c)/(tan(A())+tan(B())+tan(C()));}
double AH()const{return 2*R()*cos(A());}
double BH()const{return 2*R()*cos(B());}
double CH()const{return 2*R()*cos(C());}
double area()const{return ((b-a)^(c-a))/2;}
bool inside(const GP &x)const{
return ((b-a)^(x-a))*((c-a)^(x-a))<0&&
((a-b)^(x-b))*((c-b)^(x-b))<0&&
((a-c)^(x-c))*((b-c)^(x-c))<0;
}
bool online(const GP &x)const{return AB().online(x)||BC().online(x)||CA().online(x);}
bool outside(const GP &x)const{return (!inside(x)&&!online(x));}
friend istream& operator>>(istream &is, Triangle &x){GP X,Y,Z; is>>X>>Y>>Z; x.a=X;x.b=Y;x.c=Z;return is;}
friend ostream& operator<<(ostream &os, const Triangle &v){ os << v.a << v.b; return os; }
};
struct rational{
ll a,b;
rational(ll A=1,ll B=1):a(A),b(B){
ll g=gcd(llabs(a),llabs(b));
a/=g;b/=g;
};
rational operator+(const rational &r)const{return rational(a*r.b+b*r.a,b*r.b);}
rational operator-(const rational &r)const{return rational(a*r.b-b*r.a,b*r.b);}
rational operator*(const rational &r)const{return rational(a*r.a,b*r.b);}
rational operator/(const rational &r)const{return rational(a*r.b,b*r.a);}
rational& set(ll A,ll B){ll g=gcd(llabs(A),llabs(B));a=A/g;b=B/g;return *this;}
rational& operator+=(const rational &r){return set(a*r.b+b*r.a,b*r.b);}
rational& operator-=(const rational &r){return set(a*r.b-b*r.a,b*r.b);}
rational& operator*=(const rational &r){return set(a*r.a,b*r.b);}
rational& operator/=(const rational &r){return set(a*r.b,b*r.a);}
bool operator<(const rational &r)const{
if(b*r.b>=0) return a*r.b<b*r.a;
else return a*r.b>b*r.a;
}
bool operator==(const rational &r)const{return a*r.b==b*r.a;}
bool operator>(const rational &r)const{
if(b*r.b>=0) return a*r.b>b*r.a;
else return a*r.b<b*r.a;
}
explicit operator double(){return (double)a/(double)b;}
friend ostream& operator<<(ostream &os, const rational &x){ printf("%.16f",(double)x.a/(double)x.b); return os; }
friend istream& operator>>(istream &is, rational &x){ll vala,valb; is>>vala>>valb; x.set(vala,valb); return is;}
};
int main(){
cin.tie(nullptr);
ios::sync_with_stdio(false);
solve();
return 0;
}
void solve(){
int N;cin>>N;
vector<rational> ans(N);
REP(i,N) cin>>ans[i];
sort(rAll(ans));
REP(i,N) cout<<ans[i].a<<" "<<ans[i].b<<endl;
}