Submission #420916

#	Time	Username	Problem	Language	Result	Execution time	Memory
420916		Joo	Traffic (IOI10_traffic)	C++17	Compilation error	0 ms	0 KiB

traffic

#include<bits/stdc++.h>
#define int long long
using namespace std;

const int N = 1e6+10;

int dp[N],sum[N],val[N],sumall;
vector<int> vec[N];

void fisum(int u, int p){
    sum[u] = val[u];
    sumall += val[u];
    for(int v : vec[u]){
        if(v == p) continue;
        fisum(v, u);
        sum[u] += sum[v];
    }
}

void solve(int u, int p){
    int res = -1e18;
    for(int v : vec[u]){
        if(v == p) continue;
        solve(v, u);
        dp[u] = min(dp[u], dp[v]);
        res = max(res, sum[v]);
    }
    res = max(res, sumall-sum[u]);
    dp[u] = min(dp[u], res);
}

int LocateCentre(int n, int P[], int E1[], int E2[]){
    for(int i=0; i<n; i++){
        val[i] = P[i];
        dp[i] = 1e18;
    }
    for(int i=0; i<n-1; i++){
        vec[E1[i]].emplace_back(E2[i]);
        vec[E2[i]].emplace_back(E1[i]);
    }
    fisum(0, 0);
    solve(0, 0);
    return dp[0];
}
/*main(){
    int n,P[N],S[N],D[N];
    cin >> n;
    cout << "TEST";
    for(int i=0; i<n; i++){
        cin >> P[i];
    }
    for(int i=0; i<n-1; i++){
        cin >> S[i] >> D[i];
    }
    cout << LocateCentre(n, P, S, D);
}*/

Compilation message (stderr)

/usr/bin/ld: /tmp/ccsYdiMx.o: in function `main':
grader.cpp:(.text.startup+0xe1): undefined reference to `LocateCentre(int, int*, int*, int*)'
collect2: error: ld returned 1 exit status