제출 #480697

#제출 시각UTC-0아이디문제언어결과실행 시간메모리
4806972021-10-17 22:06:33hidden1Railway (BOI17_railway)C++14
0 / 100
111 ms23748 KiB
#include <bits/stdc++.h>
using namespace std;
//#pragma GCC optimize ("O3")
//#pragma GCC target ("sse4")
#define endl "\n"
typedef long long ll;
template<class T, class T2> inline ostream &operator <<(ostream &out, const pair<T, T2> &x) { out << x.first << " " << x.second; return out;}
template<class T, class T2> inline istream &operator >>(istream &in, pair<T, T2> &x) { in >> x.first >> x.second; return in;}
template<class T, class T2> inline bool chkmax(T &x, const T2 &y) { return x < y ? x = y, 1 : 0; }
template<class T, class T2> inline bool chkmin(T &x, const T2 &y) { return x > y ? x = y, 1 : 0; }
const ll mod = 1e9 + 7;
#ifndef LOCAL
#define cerr if(false) cerr
#endif
const int MAX_N = 1e5 + 10, MAX_LOG = 20;;
vector<pair<int, int> > g[MAX_N];
int par[MAX_N][MAX_LOG];
int d[MAX_N];
int ind[MAX_N], cnt[MAX_N];
vector<int> ans;
int n, m, k;
void dfs(int x, int p) {
par[x][0] = p;
for(int i = 1; i < MAX_LOG; i ++) {
par[x][i] = par[par[x][i - 1]][i - 1];
}
d[x] = d[p] + 1;
for(auto it : g[x]) {
 
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