Submission #373488

#TimeUTC-0UsernameProblemLanguageResultExecution timeMemory
3734882021-03-04 20:00:27eulerdesojaTraffic (IOI10_traffic)C++14
50 / 100
5056 ms38532 KiB
#include<bits/stdc++.h>
#include<fstream>
using namespace std;
#define ll long long
#define pb push_back
#define sz(x) int(x.size())
typedef pair<int,int>ii;
typedef vector<int> vi;
const int mxn=1e6+6;
//maximum of congestion in a road
vi g[mxn];
int ma[mxn],sum[mxn];
void dfs(int i,int p,int a[]){
for(int j:g[i])if(j!=p){
dfs(j,i,a);
sum[i]+=sum[j];
ma[i]=max(ma[i],max(ma[j],sum[j]));
}
sum[i]+=a[i];
}
int LocateCentre(int n,int a[],int s[],int d[]){
for(int i=0;i<n-1;i++){
g[s[i]].pb(d[i]);
g[d[i]].pb(s[i]);
}
int ans=2e9+100,res=0;
 
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