Submission #1158934

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1158934	2025-02-27 20:49:58	nikolashami	Valley (BOI19_valley)	C++20	100 / 100	123 ms	45664 KiB

valley

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#include<bits/stdc++.h>
using namespace std;
using ll=long long;
const ll N=1e5+4,inf=2e18;
vector<array<ll,2>>g[N];
ll f[N],shp[N],dep[N],up[N][17],fm[N][17];
array<ll,2>e[N];
ll tin[N],tout[N],ti,n,s,q,ext;
void dfs(ll u,ll p){
  f[u]=((shp[u]^1)*inf+dep[u]);
  up[u][0]=p;
  tin[u]=++ti;
  for(auto[v,w]:g[u]){
    if(!(v^p))continue;
    dep[v]=dep[u]+w;
    dfs(v,u);
    f[u]=min(f[u],f[v]);
  }
  tout[u]=++ti;
}
signed main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    
    cin>>n>>s>>q>>ext;
    for(int i=1,u,v,w;i<n;++i){
 
 
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• Subtask 1: 9 / 9
• Subtask 2: 27 / 27
• Subtask 3: 23 / 23
• Subtask 4: 41 / 41