제출 #738173

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
738173	2023-05-08 08:40:02	Ronin13	Hotspot (NOI17_hotspot)	C++14	100 / 100	900 ms	7032 KiB

hotspot

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#include <bits/stdc++.h>
#define ll long long
#define f first
#define s second
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pb push_back
#define epb emplace_back
#define ull unsigned ll
using namespace std;
const int nmax = 200001;
vector <vector <int>  > g(nmax);
vector <double> ans(nmax);
int n;
void BFS(int a, int b){
    queue <int> q;
    vector <int> dp(n + 1, 0);
    dp[a] = 1;
    vector <int> d(n + 1, 1e9);
    d[a] = 0;
    q.push(a);
    while(!q.empty()){
        int v = q.front(); q.pop();
        for(int to : g[v]){
            if(d[to] == d[v]) continue;
            if(d[to] > d[v]) dp[to] += dp[v];
            if(d[to] == 1e9) d[to] = d[v] + 1, q.push(to);
        }
 
 
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