結果
| 問題 | No.470 Inverse S+T Problem |
| ユーザー |
 smiken_61
|
| 提出日時 | 2018-11-04 01:21:39 |
| 言語 | C++11 (gcc 11.4.0) |
| 結果 |
AC
|
| 実行時間 | 2 ms / 2,000 ms |
| コード長 | 15,242 bytes |
| コンパイル時間 | 1,688 ms |
| コンパイル使用メモリ | 181,200 KB |
| 実行使用メモリ | 6,944 KB |
| 最終ジャッジ日時 | 2024-06-01 22:57:14 |
| 合計ジャッジ時間 | 2,746 ms |
|
ジャッジサーバーID （参考情報） |
judge4 / judge3 |
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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 | AC | 2 ms
6,940 KB |
| testcase_03 | AC | 2 ms
6,940 KB |
| testcase_04 | AC | 1 ms
6,944 KB |
| testcase_05 | AC | 1 ms
6,944 KB |
| testcase_06 | AC | 2 ms
6,940 KB |
| testcase_07 | AC | 2 ms
6,940 KB |
| testcase_08 | AC | 2 ms
6,940 KB |
| testcase_09 | AC | 2 ms
6,944 KB |
| testcase_10 | AC | 2 ms
6,944 KB |
| testcase_11 | AC | 1 ms
6,940 KB |
| testcase_12 | AC | 2 ms
6,940 KB |
| testcase_13 | AC | 2 ms
6,940 KB |
| testcase_14 | AC | 2 ms
6,940 KB |
| testcase_15 | AC | 1 ms
6,940 KB |
| testcase_16 | AC | 2 ms
6,940 KB |
| testcase_17 | AC | 2 ms
6,940 KB |
| testcase_18 | AC | 2 ms
6,940 KB |
| testcase_19 | AC | 2 ms
6,944 KB |
| testcase_20 | AC | 2 ms
6,940 KB |
| testcase_21 | AC | 2 ms
6,940 KB |
| testcase_22 | AC | 1 ms
6,944 KB |
| testcase_23 | AC | 2 ms
6,940 KB |
| testcase_24 | AC | 1 ms
6,940 KB |
| testcase_25 | AC | 1 ms
6,940 KB |
| testcase_26 | AC | 2 ms
6,944 KB |
| testcase_27 | AC | 1 ms
6,940 KB |
| testcase_28 | AC | 1 ms
6,944 KB |
| testcase_29 | AC | 2 ms
6,940 KB |
| testcase_30 | AC | 2 ms
6,940 KB |
ソースコード
#include <bits/stdc++.h>
// #include <boost/multiprecision/cpp_int.hpp>
#define int long long
#define inf 1000000007
#define pa pair<int,int>
#define ll long long
#define pal pair<double,double>
#define ppap pair<pa,int>
#define PI 3.14159265358979323846
#define paa pair<int,char>
#define mp make_pair
#define pb push_back
#define EPS (1e-10)
int dx[8]={0,1,0,-1,1,1,-1,-1};
int dy[8]={1,0,-1,0,-1,1,1,-1};
using namespace std;
class pa3{
public:
int x,y,z;
pa3(int x=0,int y=0,int z=0):x(x),y(y),z(z) {}
bool operator < (const pa3 &p) const{
if(x!=p.x) return x<p.x;
if(y!=p.y) return y<p.y;
return z<p.z;
//return x != p.x ? x<p.x: y<p.y;
}
bool operator > (const pa3 &p) const{
if(x!=p.x) return x>p.x;
if(y!=p.y) return y>p.y;
return z>p.z;
//return x != p.x ? x<p.x: y<p.y;
}
bool operator == (const pa3 &p) const{
return x==p.x && y==p.y && z==p.z;
}
bool operator != (const pa3 &p) const{
return !( x==p.x && y==p.y && z==p.z);
}
};
class pa4{
public:
int x;
int y,z,w;
pa4(int x=0,int y=0,int z=0,int w=0):x(x),y(y),z(z),w(w) {}
bool operator < (const pa4 &p) const{
if(x!=p.x) return x<p.x;
if(y!=p.y) return y<p.y;
if(z!=p.z)return z<p.z;
return w<p.w;
//return x != p.x ? x<p.x: y<p.y;
}
bool operator > (const pa4 &p) const{
if(x!=p.x) return x>p.x;
if(y!=p.y) return y>p.y;
if(z!=p.z)return z>p.z;
return w>p.w;
//return x != p.x ? x<p.x: y<p.y;
}
bool operator == (const pa4 &p) const{
return x==p.x && y==p.y && z==p.z &&w==p.w;
}
};
class pa2{
public:
int x,y;
pa2(int x=0,int y=0):x(x),y(y) {}
pa2 operator + (pa2 p) {return pa2(x+p.x,y+p.y);}
pa2 operator - (pa2 p) {return pa2(x-p.x,y-p.y);}
bool operator < (const pa2 &p) const{
return y != p.y ? y<p.y: x<p.x;
}
bool operator > (const pa2 &p) const{
return x != p.x ? x<p.x: y<p.y;
}
bool operator == (const pa2 &p) const{
return abs(x-p.x)==0 && abs(y-p.y)==0;
}
bool operator != (const pa2 &p) const{
return !(abs(x-p.x)==0 && abs(y-p.y)==0);
}
};
/*
class Point{
public:
double x,y;
Point(double x=0,double y=0):x(x),y(y) {}
Point operator + (Point p) {return Point(x+p.x,y+p.y);}
Point operator - (Point p) {return Point(x-p.x,y-p.y);}
Point operator * (double a) {return Point(x*a,y*a);}
Point operator / (double a) {return Point(x/a,y/a);}
double absv() {return sqrt(norm());}
double norm() {return x*x+y*y;}
bool operator < (const Point &p) const{
return x != p.x ? x<p.x: y<p.y;
}
bool operator == (const Point &p) const{
return fabs(x-p.x)<EPS && fabs(y-p.y)<EPS;
}
};
typedef Point Vector;
#define pl pair<int,pas>
struct Segment{
Point p1,p2;
};
double dot(Vector a,Vector b){
return a.x*b.x+a.y*b.y;
}
double cross(Vector a,Vector b){
return a.x*b.y-a.y*b.x;
}
bool parareru(Point a,Point b,Point c,Point d){
// if(abs(cross(a-b,d-c))<EPS)cout<<"dd "<<cross(a-b,d-c)<<endl;
return abs(cross(a-b,d-c))<EPS;
}
double distance_ls_p(Point a, Point b, Point c) {
if ( dot(b-a, c-a) < EPS ) return (c-a).absv();
if ( dot(a-b, c-b) < EPS ) return (c-b).absv();
return abs(cross(b-a, c-a)) / (b-a).absv();
}
bool is_intersected_ls(Segment a,Segment b) {
if(a.p1==b.p1||a.p2==b.p1||a.p1==b.p2||a.p2==b.p2) return false;
if(parareru((a.p2),(a.p1),(a.p1),(b.p2))&¶reru((a.p2),(a.p1),(a.p1),(b.p1))){
// cout<<"sss"<<endl;
if(dot(a.p1-b.p1,a.p1-b.p2)<EPS) return true;
if(dot(a.p2-b.p1,a.p2-b.p2)<EPS) return true;
if(dot(a.p1-b.p1,a.p2-b.p1)<EPS) return true;
if(dot(a.p1-b.p2,a.p2-b.p2)<EPS) return true;
return false;
}
else return ( cross(a.p2-a.p1, b.p1-a.p1) * cross(a.p2-a.p1, b.p2-a.p1) < EPS ) && ( cross(b.p2-b.p1, a.p1-b.p1) * cross(b.p2-b.p1, a.p2-b.p1) < EPS );
}
double segment_dis(Segment a,Segment b){
if(is_intersected_ls(a,b))return 0;
double r=distance_ls_p(a.p1, a.p2, b.p1);
r=min(r,distance_ls_p(a.p1, a.p2, b.p2));
r=min(r,distance_ls_p(b.p1, b.p2, a.p2));
r=min(r,distance_ls_p(b.p1, b.p2, a.p1));
return r;
}
Point intersection_ls(Segment a, Segment b) {
Point ba = b.p2-b.p1;
double d1 = abs(cross(ba, a.p1-b.p1));
double d2 = abs(cross(ba, a.p2-b.p1));
double t = d1 / (d1 + d2);
return a.p1 + (a.p2-a.p1) * t;
}
*/
string itos( int i ) {
ostringstream s ;
s << i ;
return s.str() ;
}
int gcd(int v,int b){
if(v>b) return gcd(b,v);
if(v==b) return b;
if(b%v==0) return v;
return gcd(v,b%v);
}
double distans(double x1,double y1,double x2,double y2){
double rr=(x1-x2)*(x1-x2)+(y1-y2)*(y1-y2);
return sqrt(rr);
}
int mod;
int pr[500010];
int inv[500010];
int beki(int wa,int rr,int warukazu){
if(rr==0) return 1%warukazu;
if(rr==1) return wa%warukazu;
wa%=warukazu;
if(rr%2==1) return ((ll)beki(wa,rr-1,warukazu)*(ll)wa)%warukazu;
ll zx=beki(wa,rr/2,warukazu);
return (zx*zx)%warukazu;
}
double bekid(double w,int r){
if(r==0) return 1.0;
if(r==1) return w;
if(r%2) return bekid(w,r-1)*w;
double f=bekid(w,r/2);
return f*f;
}
int comb(int nn,int rr){
int r=pr[nn]*inv[rr];
r%=mod;
r*=inv[nn-rr];
r%=mod;
return r;
}
/*
void gya(int ert){
pr[0]=1;
for(int i=1;i<ert;i++){
pr[i]=(pr[i-1]*i)%mod;
}
for(int i=0;i<ert;i++) inv[i]=beki(pr[i],mod-2,mod);
}
*/
// cin.tie(0);
// ios::sync_with_stdio(false);
//priority_queue<pa3,vector<pa3>,greater<pa3>> pq;
//sort(ve.begin(),ve.end(),greater<int>());
//----------------kokomade tenpure------------
//vector<double> ans(100000000),ans2(100000000)
vector<pa> ve;
vector<int> gr[5100];
vector<int> igr[5100];
vector<int> ban;
int V;
int visit[5100]={0},gro[5100]={0};
void addedge(int i,int j){
gr[i].pb(j);
igr[j].pb(i);
// cout<<i-1500<<" "<<j-1500<<endl;
}
void dfs(int i){
if(visit[i]==0){
visit[i]=1;
for(int k=0;k<gr[i].size();k++) dfs(gr[i][k]);
ban.push_back(i);
}
}
void idfs(int i,int h){
if(visit[i]==0){
visit[i]=1;
gro[i]=h;
for(int k=0;k<igr[i].size();k++) idfs(igr[i][k],h);
}
}
void kyouren(){
for(int i=0;i<V;i++){
dfs(i);
}
for(int i=0;i<V;i++) visit[i]=0;
for(int i=V-1;i>=0;i--){
idfs(ban[i],ban[i]);
}
}
set<pa> se;
vector<int> D[3000];
string s[1500];
int w[1500];
int iri[3000]={0};
vector<int> topo;
int jun[3000];
signed main(){
cin.tie(0);
ios::sync_with_stdio(false);
int n;
cin>>n;
if(n>=1400){
cout<<"Impossible"<<endl;
return 0;
}
for(int i=1;i<=n;i++)cin>>s[i];
for(int i=1;i<=n;i++)for(int j=i+1;j<=n;j++){
int b=0;
if(s[i][0]!=s[j][0] && (s[i][1]!=s[j][1]||s[i][2]!=s[j][2])) b+=2;
if(s[i][0]!=s[j][2] && (s[i][1]!=s[j][0]||s[i][2]!=s[j][1])) b+=1;
if(s[i][2]!=s[j][0] && (s[i][0]!=s[j][1]||s[i][1]!=s[j][2])) b+=4;
if(s[i][2]!=s[j][2] && (s[i][0]!=s[j][0]||s[i][1]!=s[j][1])) b+=8;
//cout<<i<<" "<<j<<" "<<b<<endl;
if(b==0){
cout<<"Impossible"<<endl;
return 0;
}
if(b==1){
ve.pb({i,i});
ve.pb({-j,-j});
}
if(b==2){
ve.pb({i,i});
ve.pb({j,j});
}
if(b==4){
ve.pb({-i,-i});
ve.pb({j,j});
}
if(b==8){
ve.pb({-i,-i});
ve.pb({-j,-j});
}
if(b==3){
ve.pb({i,i});
}
if(b==9){
// ve.pb(i,i);
ve.pb({-j,-j});
}
if(b==6){
ve.pb({j,j});
// ve.pb(-j,-j);
}
if(b==12){
ve.pb({-i,-i});
// ve.pb(-j,-j);
}
if(b==5){
ve.pb({i,j});
ve.pb({-i,-j});
}
if(b==10){
ve.pb({i,-j});
ve.pb({-i,j});
}
if(b==7){
ve.pb({i,j});
}
if(b==11){
ve.pb({i,-j});
}
if(b==13){
ve.pb({-i,-j});
}
if(b==14){
ve.pb({-i,j});
}
}
for(auto &v:ve){
v.first+=1500;
v.second+=1500;
}
for(auto v:ve){
if(v.first==v.second){
addedge(3000-v.first,v.second);
}
else{
addedge(3000-v.first,v.second);
addedge(3000-v.second,v.first);
}
}
V=3000;
kyouren();
// cout<<endl;
// for(int i=1;i<=n;i++)cout<<gro[1500+i]-1500<<" "<<gro[1500-i]-1500<<endl;
for(int i=1;i<=n;i++)if(gro[1500-i]==gro[1500+i]){
// cout<<i<<endl;
cout<<"Impossible"<<endl;
return 0;
}
for(int i=0;i<3000;i++){
for(auto v:gr[i])if(gro[i]!=gro[v])if(se.count({gro[i],gro[v]})==0){
D[gro[i]].pb(gro[v]);
iri[gro[v]]++;
// cout<<" "<<gro[i]-1500<<" "<<gro[v]-1500<<endl;
se.insert({gro[i],gro[v]});
}
}
queue<int> qu;
for(int i=0;i<3000;i++)if(iri[i]==0)qu.push(i);
while(qu.size()){
int z=qu.front();
topo.pb(z);
qu.pop();
for(auto v:D[z]){
iri[v]--;
if(iri[v]==0)qu.push(v);
}
}
// cout<<topo.size()<<endl;
assert(topo.size()==3000);
for(int i=0;i<3000;i++)jun[topo[i]]=i;
for(int i=1;i<=n;i++){
int g1=gro[1500+i];
int g2=gro[1500-i];
if(jun[g1]<jun[g2])w[i]=-1;
else w[i]=1;
if(w[i]==1) cout<<s[i][0]<<" "<<s[i][1]<<s[i][2]<<endl;
else cout<<s[i][0]<<s[i][1]<<" "<<s[i][2]<<endl;
}
}