結果

問題 No.2677 Minmax Independent Set
ユーザー leaf_1415leaf_1415
提出日時 2024-03-15 22:20:00
言語 C++11
(gcc 13.3.0)
結果
AC  
実行時間 212 ms / 2,000 ms
コード長 11,064 bytes
コンパイル時間 1,639 ms
コンパイル使用メモリ 131,276 KB
実行使用メモリ 52,388 KB
最終ジャッジ日時 2024-09-30 01:42:23
合計ジャッジ時間 9,327 ms
ジャッジサーバーID
(参考情報)
judge2 / judge3
このコードへのチャレンジ
(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 1 ms
6,820 KB
testcase_01 AC 2 ms
6,816 KB
testcase_02 AC 2 ms
6,820 KB
testcase_03 AC 2 ms
6,820 KB
testcase_04 AC 2 ms
6,816 KB
testcase_05 AC 170 ms
32,748 KB
testcase_06 AC 163 ms
32,932 KB
testcase_07 AC 165 ms
33,300 KB
testcase_08 AC 164 ms
33,800 KB
testcase_09 AC 172 ms
34,664 KB
testcase_10 AC 140 ms
31,140 KB
testcase_11 AC 131 ms
31,140 KB
testcase_12 AC 190 ms
52,388 KB
testcase_13 AC 194 ms
38,308 KB
testcase_14 AC 178 ms
38,272 KB
testcase_15 AC 208 ms
42,804 KB
testcase_16 AC 200 ms
30,828 KB
testcase_17 AC 201 ms
30,700 KB
testcase_18 AC 125 ms
20,736 KB
testcase_19 AC 144 ms
23,904 KB
testcase_20 AC 35 ms
10,496 KB
testcase_21 AC 168 ms
26,120 KB
testcase_22 AC 9 ms
6,820 KB
testcase_23 AC 2 ms
6,816 KB
testcase_24 AC 2 ms
6,820 KB
testcase_25 AC 2 ms
6,820 KB
testcase_26 AC 2 ms
6,816 KB
testcase_27 AC 2 ms
6,816 KB
testcase_28 AC 120 ms
31,200 KB
testcase_29 AC 187 ms
44,300 KB
testcase_30 AC 1 ms
6,820 KB
testcase_31 AC 2 ms
6,820 KB
testcase_32 AC 1 ms
6,820 KB
testcase_33 AC 1 ms
6,820 KB
testcase_34 AC 2 ms
6,816 KB
testcase_35 AC 2 ms
6,816 KB
testcase_36 AC 2 ms
6,820 KB
testcase_37 AC 2 ms
6,816 KB
testcase_38 AC 2 ms
6,816 KB
testcase_39 AC 2 ms
6,820 KB
testcase_40 AC 3 ms
6,816 KB
testcase_41 AC 5 ms
6,816 KB
testcase_42 AC 8 ms
6,816 KB
testcase_43 AC 16 ms
6,816 KB
testcase_44 AC 32 ms
10,112 KB
testcase_45 AC 84 ms
16,640 KB
testcase_46 AC 188 ms
30,176 KB
testcase_47 AC 202 ms
30,596 KB
testcase_48 AC 212 ms
30,588 KB
testcase_49 AC 197 ms
30,668 KB
testcase_50 AC 43 ms
13,728 KB
testcase_51 AC 4 ms
6,820 KB
testcase_52 AC 105 ms
26,428 KB
testcase_53 AC 96 ms
24,544 KB
testcase_54 AC 4 ms
6,820 KB
testcase_55 AC 145 ms
31,312 KB
testcase_56 AC 154 ms
31,276 KB
testcase_57 AC 156 ms
31,352 KB
testcase_58 AC 152 ms
31,328 KB
testcase_59 AC 143 ms
31,320 KB
testcase_60 AC 78 ms
30,620 KB
testcase_61 AC 83 ms
30,884 KB
testcase_62 AC 84 ms
34,848 KB
testcase_63 AC 87 ms
41,876 KB
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <ctime>
#include <cstdlib>
#include <cassert>
#include <vector>
#include <list>
#include <stack>
#include <queue>
#include <deque>
#include <map>
#include <set>
#include <bitset>
#include <string>
#include <algorithm>
#include <utility>
#include <complex>
#include <array>
#include <unordered_set>
#include <unordered_map>
#define rep(x, s, t) for(ll x = (s); (x) <= (t); (x)++)
#define per(x, s, t) for(ll x = (s); (x) >= (t); (x)--)
#define reps(x, s) for(ll x = 0; (x) < (ll)(s).size(); (x)++)
#define pers(x, s) for(ll x = (ll)(s).size()-1; (x) >= 0; (x)--)
#define chmin(x, y) (x) = min((x), (y))
#define chmax(x, y) (x) = max((x), (y))
#define sz(x) ((ll)(x).size())
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()
#define outl(...) dump_func(__VA_ARGS__)
#define outf(x) cout << fixed << setprecision(16) << (x) << endl
#define pb push_back
#define fi first
#define se second
#define inf 2e18
#define eps 1e-9
const double PI = 3.1415926535897932384626433;
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<ll, ll> P;
struct edge{
ll to, cost;
edge(){}
edge(ll a, ll b){ to = a, cost = b;}
};
const int dx[] = {1, 0, -1, 0}, dy[] = {0, -1, 0, 1};
const int dx8[] = {1, 1, 0, -1, -1, -1, 0, 1}, dy8[] = {0, -1, -1, -1, 0, 1, 1, 1};
const int mod = 998244353;
//const int mod = 1000000007;
struct mint{
int x;
mint(ll y = 0){if(y < 0 || y >= mod) y = (y%mod+mod)%mod; x = y;}
mint(const mint &ope) {x = ope.x;}
mint operator-(){return mint(-x);}
mint operator+(const mint &ope){return mint(x) += ope;}
mint operator-(const mint &ope){return mint(x) -= ope;}
mint operator*(const mint &ope){return mint(x) *= ope;}
mint operator/(const mint &ope){return mint(x) /= ope;}
mint& operator+=(const mint &ope){x += ope.x; if(x >= mod) x -= mod; return *this;}
mint& operator-=(const mint &ope){x += mod - ope.x; if(x >= mod) x -= mod; return *this;}
mint& operator*=(const mint &ope){ll tmp = x; tmp *= ope.x, tmp %= mod; x = tmp; return *this;}
mint& operator/=(const mint &ope){
ll n = mod-2; mint mul = ope;
while(n){if(n & 1) *this *= mul; mul *= mul; n >>= 1;}
return *this;
}
mint inverse(){return mint(1) / *this;}
bool operator ==(const mint &ope){return x == ope.x;}
bool operator !=(const mint &ope){return x != ope.x;}
bool operator <(const mint &ope)const{return x < ope.x;}
};
mint modpow(mint a, ll n){
if(n == 0) return mint(1);
if(n % 2) return a * modpow(a, n-1);
else return modpow(a*a, n/2);
}
istream& operator >>(istream &is, mint &ope){ll t; is >> t, ope = mint(t); return is;}
ostream& operator <<(ostream &os, mint &ope){return os << ope.x;}
ostream& operator <<(ostream &os, const mint &ope){return os << ope.x;}
ll modpow(ll a, ll n, ll mod){
if(n == 0) return 1;
if(n % 2) return ((a%mod) * (modpow(a, n-1, mod)%mod)) % mod;
else return modpow((a*a)%mod, n/2, mod) % mod;
}
vector<mint> fact, fact_inv;
void make_fact(int n){
fact.resize(n+1), fact_inv.resize(n+1);
fact[0] = mint(1); rep(i, 1, n) fact[i] = fact[i-1] * mint(i);
fact_inv[n] = fact[n].inverse(); per(i, n-1, 0) fact_inv[i] = fact_inv[i+1] * mint(i+1);
}
mint comb(int n, int k){ if(n < 0 || k < 0 || n < k) return mint(0); return fact[n] * fact_inv[k] * fact_inv[n-k];}
mint perm(int n, int k){ return comb(n, k) * fact[k]; }
mint divide(int n, int k){ if(n == 0 && k == 0) return 1; return comb(n+k-1, k-1); }
template<typename T> T comb2(ll n, ll k){ if(n < 0 || k < 0 || n < k) return T(0); T ret = 1; rep(i, 1, k) ret *= n-k+i, ret /= i; return ret;}
vector<ll> prime, pvec, qrime;
void make_prime(int n){
prime.resize(n+1);
rep(i, 2, n){
if(prime[i] == 0) pvec.push_back(i), prime[i] = i;
for(auto p : pvec){ if(i*p > n || p > prime[i]) break; prime[i*p] = p;}
}
}
void make_qrime(int n){
qrime.resize(n+1);
rep(i, 2, n){int ni = i / prime[i]; if(prime[i] == prime[ni]) qrime[i] = qrime[ni] * prime[i]; else qrime[i] = prime[i];}
}
void factorize(ll n, map<ll, ll> &mp){
mp.clear();
for(auto p : pvec) while(n % p == 0) mp[p]++, n /= p;
if(n > 1) mp[n]++;
}
bool exceed(ll x, ll y, ll m){return y > 0 && x >= m / y + 1;}
void mark(){ cout << "*" << endl; }
void yes(){ cout << "Yes" << endl; }
void no(){ cout << "No" << endl; }
ll floor(ll a, ll b){ if(b < 0) a *= -1, b *= -1; if(a >= 0) return a/b; else return -((-a+b-1)/b); }
ll ceil(ll a, ll b){ if(b < 0) a *= -1, b *= -1; if(a >= 0) return (a+b-1)/b; else return -((-a)/b); }
ll modulo(ll a, ll b){ b = abs(b); return a - floor(a, b) * b;}
ll sgn(ll x){ if(x > 0) return 1; if(x < 0) return -1; return 0;}
ll gcd(ll a, ll b){if(b == 0) return a; return gcd(b, a%b);}
ll lcm(ll a, ll b){return a/gcd(a, b)*b;}
template<typename T> T arith(T x){return x*(x+1)/2;}
template<typename T> T arith2(T x){return x*(x+1)*(x*2+1)/6;}
ll digitnum(ll x, ll b = 10){ll ret = 0; for(; x; x /= b) ret++; return ret;}
ll digitsum(ll x, ll b = 10){ll ret = 0; for(; x; x /= b) ret += x % b; return ret;}
string lltos(ll x, ll b = 10){if(x == 0) return "0"; string ret; for(;x;x/=b) ret += x % b + '0'; reverse(all(ret)); return ret;}
ll stoll(string &s, ll b = 10){ll ret = 0; for(auto c : s) ret *= b, ret += c - '0'; return ret;}
template<typename T> void uniq(T &vec){sort(all(vec)); vec.erase(unique(all(vec)), vec.end());}
int popcount(ull x){
x -= ((x>>1)&0x5555555555555555ULL), x = (x & 0x3333333333333333ULL) + ((x>>2) & 0x3333333333333333ULL);
return (((x + (x>>4)) & 0x0F0F0F0F0F0F0F0FULL) * 0x0101010101010101ULL) >> 56;
}
template<typename T> vector<pair<T, ll>> rle(vector<T> vec){
vector<pair<T, ll>> ret;
for(auto x : vec){if(sz(ret) == 0 || ret.back().first != x) ret.push_back(P(x, 1)); else ret.back().second++;}
return ret;
}
vector<pair<char, ll>> rle(string s){ vector<char> vec; for(auto c : s) vec.push_back(c); return rle(vec);}
template<class S, class T> pair<S, T>& operator+=(pair<S, T> &s, const pair<S, T> &t){s.first += t.first, s.second += t.second; return s;}
template<class S, class T> pair<S, T>& operator-=(pair<S, T> &s, const pair<S, T> &t){s.first -= t.first, s.second -= t.second; return s;}
template<class S, class T> pair<S, T> operator+(const pair<S, T> &s, const pair<S, T> &t){return pair<S,T>(s.first+t.first, s.second+t.second);}
template<class S, class T> pair<S, T> operator-(const pair<S, T> &s, const pair<S, T> &t){return pair<S,T>(s.first-t.first, s.second-t.second);}
template<class T> T dot(const pair<T, T> &s, const pair<T, T> &t){return s.first*t.first + s.second*t.second;}
template<class T> T cross(const pair<T, T> &s, const pair<T, T> &t){return s.first*t.second - s.second*t.first;}
template<class T> T mdist(pair<T, T> s, pair<T, T> t){return abs(s.first-t.first) + abs(s.second-t.second);}
template<class T> T cdist(pair<T, T> s, pair<T, T> t){return max(abs(s.first-t.first), abs(s.second-t.second));}
template<class T> T edist2(pair<T, T> s, pair<T, T> t){return (s.first-t.first)*(s.first-t.first) + (s.second-t.second)*(s.second-t.second);}
template<typename T> ostream& operator << (ostream& os, vector<T>& vec){reps(i, vec) os << vec[i] << " "; return os;}
template<typename T> ostream& operator << (ostream& os, const vector<T>& vec){reps(i, vec) os << vec[i] << " "; return os;}
template<typename T> ostream& operator << (ostream& os, list<T>& ls){for(auto x : ls) os << x << " "; return os;}
template<typename T> ostream& operator << (ostream& os, const list<T>& ls){for(auto x : ls) os << x << " "; return os;}
template<typename T> ostream& operator << (ostream& os, deque<T>& deq){reps(i, deq) os << deq[i] << " "; return os;}
template<typename T, typename U> ostream& operator << (ostream& os, pair<T, U>& ope){ os << "(" << ope.first << ", " << ope.second << ")"; return os
    ;}
template<typename T, typename U> ostream& operator << (ostream& os, const pair<T, U>& ope){ os << "(" << ope.first << ", " << ope.second << ")";
    return os;}
template<typename T, typename U> ostream& operator << (ostream& os, map<T, U>& ope){ for(auto p : ope) os << "(" << p.first << ", " << p.second << "
    ),";return os;}
template<typename T> ostream& operator << (ostream& os, set<T>& ope){for(auto x : ope) os << x << " "; return os;}
template<typename T> ostream& operator << (ostream& os, multiset<T>& ope){for(auto x : ope) os << x << " "; return os;}
template<typename T> void outa(T a[], ll s, ll t){rep(i, s, t){ cout << a[i]; if(i < t) cout << " ";} cout << endl;}
template<typename T, size_t N> ostream& operator << (ostream& os, array<T, N>& arr){reps(i, arr) os << arr[i] << " "; return os;}
template<typename T, size_t N> ostream& operator << (ostream& os, const array<T, N>& arr){reps(i, arr) os << arr[i] << " "; return os;}
void dump_func(){cout << endl;}
template <class Head, class... Tail>
void dump_func(Head &&head, Tail &&... tail){cout << head; if(sizeof...(Tail) > 0) cout << " "; dump_func(std::move(tail)...);}
template<typename T> void bssert(bool b, T t){ if(!b) cout << t << endl, exit(0); }
struct Rerooting{
typedef P T;
struct edge{
int to;
edge(){}
edge(int a){to = a;}
};
int n;
vector<vector<edge> > G;
vector<int> parent;
vector<T> dp, dp2, ans;
vector<T> lsum, rsum;
Rerooting(){};
Rerooting(int n){
this->n = n;
init();
}
void init(){
G.clear(), G.resize(n+1);
parent.resize(n+1);
dp.resize(n+1), dp2.resize(n+1);
lsum.resize(n+1), rsum.resize(n+1);
ans.resize(n+1);
}
void add_edge(int u, int v){
G[u].push_back(edge(v));
G[v].push_back(edge(u));
}
T Ident(){ //
return P(0, 0);
}
T ope(T a){ //
swap(a.fi, a.se);
chmax(a.se, a.fi);
return a;
}
T ope2(T a, T b){ //
return a + b;
}
T ope3(int v, T sum){ //
sum.fi++;
return sum;
}
T& get(int u, int v){
if(parent[u] == v) return dp2[u];
else return dp[v];
}
void dfs(int v, int p)
{
parent[v] = p;
for(auto e : G[v]) if(e.to != p) dfs(e.to, v);
T sum = Ident();
for(auto e : G[v]) if(e.to != p) sum = ope2(sum, ope(get(v, e.to)));
dp[v] = ope3(v, sum);
}
void dfs2(int v, int p)
{
ll m = sz(G[v]); T sum;
sum = lsum[0] = Ident();
rep(i, 0, m-1){
sum = ope2(sum, ope(get(v, G[v][i].to)));
lsum[i+1] = sum;
}
sum = rsum[m+1] = Ident();
per(i, m-1, 0){
sum = ope2(sum, ope(get(v, G[v][i].to)));
rsum[i+1] = sum;
}
reps(i, G[v]){
int u = G[v][i].to;
if(u == p) continue;
T sum = ope2(lsum[i], rsum[i+2]);
dp2[u] = ope3(v, sum);
}
for(auto e : G[v]) if(e.to != p) dfs2(e.to, v);
}
void calc(){
dfs(1, -1), dfs2(1, -1);
rep(i, 1, n){
T sum = Ident();
for(auto e : G[i]) sum = ope2(sum, ope(get(i, e.to)));
ans[i] = ope3(i, sum);
}
}
void print(){
rep(i, 1, n) for(auto e : G[i]) outl(i, "->", e.to, ":", get(i, e.to));
}
};
ll n;
int main(void)
{
ios::sync_with_stdio(0);
cin.tie(0);
cin >> n;
Rerooting rt(n);
ll u, v;
rep(i, 1, n-1){
cin >> u >> v;
rt.add_edge(u, v);
}
rt.calc();
//for(auto p : rt.ans) outl(p);
ll mans = inf;
rep(i, 1, n) chmin(mans, rt.ans[i].fi);
outl(mans);
return 0;
}
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0