Submission #441671

#	Time	Username	Problem	Language	Result	Execution time	Memory
441671		mate	Traffic (IOI10_traffic)	C++14	Compilation error	0 ms	0 KiB

traffic

#include<bits/stdc++.h>
#define int long long
#define ull unsigned ll
#define pii pair<int,int>
#define pll pair<ll,ll>
#define ff first
#define ss second
#define pb push_back
#define INF LLONG_MAX

using namespace std;

const int NMAX=200001;
int p[NMAX],d[NMAX];
vector<int> g[NMAX];

void DFS(int v,int e=-1){
    d[v]=p[v];
    for(int u: g[v])
        if(u!=e){
            DFS(u,v);
            d[v]+=d[u];
        }
}
int mn=INF;
void dfs(int v,int e=-1){
    int ans=d[1]-d[v];
    for(int u: g[v])
        if(u!=e){
            dfs(u,v);
            ans=max(ans,d[u]);
        }
    mn=min(mn,ans);
}
main(){
    int n;
    cin >> n;
    for(int i=1;i<=n;i++)
        cin >> p[i];
    for(int i=1;i<n;i++){
        int v,u;
        cin >> v >> u;
        g[v].pb(u);
        g[u].pb(v);
    }
    DFS(1);
    dfs(1);
    cout << mn;

}

Compilation message (stderr)

traffic.cpp:35:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   35 | main(){
      | ^~~~
/usr/bin/ld: /tmp/cct7zO6k.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/cccvKBnm.o:traffic.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/cct7zO6k.o: in function `main':
grader.cpp:(.text.startup+0xe1): undefined reference to `LocateCentre(int, int*, int*, int*)'
collect2: error: ld returned 1 exit status