Submission #377140

#	Time	Username	Problem	Language	Result	Execution time	Memory
377140		kevinxiehk	Traffic (IOI10_traffic)	C++17	Compilation error	0 ms	0 KiB

traffic

#include <bits/stdc++.h>
#define mp make_pair
#define pb emplace_back
#define fi first
#define se second
#define ick cout<<"ickbmi32.9\n"
using namespace std;
int ans=0,arr[1000005],wt[1000005],n,t,tt;
vector<int>conn[1000005];
void dfs1(int now){
    wt[now]=arr[now];
    for(auto x:conn[now]){
        if(wt[x]!=-1)continue;
        dfs1(x);
        wt[now]+=wt[x];
    }
    return;
}
signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);cout.tie(0);
    cin>>n;
    for(int i=0;i<n;i++)cin>>arr[i];
    for(int i=1;i<n;i++){
        cin>>t>>tt;
        conn[t].pb(tt);conn[tt].pb(t);
    }
    memset(wt,-1,sizeof wt);
    dfs1(0);
    while(1){
        //for(int i=0;i<n;i++)cout<<wt[i]<<' ';
        //cout<<ans<<'\n';
        int tm=-1,tmid=-1;
        for(auto x:conn[ans]){
            if(wt[x]>tm){
                tm=wt[x];
                tmid=x;
            }
        }
        if(wt[ans]-wt[tmid]>=tm){
            cout<<ans<<'\n';
            return 0;
        }
        wt[tmid]=wt[ans];
        wt[ans]=-1;
        ans=tmid;
    }
    return 0;
}

Compilation message (stderr)

/tmp/ccWKIvH0.o: In function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'
/tmp/cczvYe1H.o:traffic.cpp:(.text.startup+0x0): first defined here
/tmp/ccWKIvH0.o: In function `main':
grader.cpp:(.text.startup+0xd9): undefined reference to `LocateCentre(int, int*, int*, int*)'
collect2: error: ld returned 1 exit status