Submission #765060

#TimeUTC-0UsernameProblemLanguageResultExecution timeMemory
7650602023-06-24 08:03:15vjudge1Roadside Advertisements (NOI17_roadsideadverts)C++17
30 / 100
31 ms12076 KiB
//#pragma GCC optomize ("Ofast")
//#pragma GCC optomize ("unroll-loops")
//#pragma GCC target ("avx,avx2,fma")
#include <bits/stdc++.h>
#define F first
#define S second
#define ll long long
#define int long long
#define pb push_back
#define all(x) (x.begin(),x.end())
#define ios ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
using namespace std;
const ll N = 2e5+9, INF = 1e18 , inf = 1e9 , mod = 1e9+7;
vector<pair<int,int>>g[N];
int p[N];
int dep[N];
int pref[N];
bool was[N];
void dfs(int v){
was[v]=1;
for(auto to:g[v]){
if(to.F==p[v]||was[to.F])continue;
p[to.F]=v;
 
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