Submission #362321

#	Time	Username	Problem	Language	Result	Execution time	Memory
362321		saifu	Traffic (IOI10_traffic)	C++14	0 / 100	16 ms	23788 KiB

traffic

// ----- In the name of ALLAH, the Most Gracious, the Most Merciful -----

#include "traffic.h"
#include<bits/stdc++.h>
using namespace std;

#define endl "\n"
#define mod 1000000007
#define inf (int)1e18 

const int mxn = 1e6+10;
vector<int> g[mxn];
int people[mxn];
int dp[mxn];
int children[mxn];
int total;

void dfs(int v, int p=-1){

    for(int u : g[v]){
        if(u==p) continue;
        dfs(u,v);
        children[v] += children[u];
        dp[v] = max(dp[v],children[u]);
    }

    dp[v] = max(dp[v],total-children[v]-people[v]);
    children[v] += people[v];
}

int LocateCentre (int n, int p[], int d[], int s[]){

    for(int i=0;i<n;i++) people[i] = p[i];

    for(int i=0;i<n-1;i++){
        g[s[i]].push_back(d[i]);
        g[d[i]].push_back(s[i]);
    }

    int mn = inf,idx=-1;
    for(int i=0;i<n;i++){
        if(mn>dp[i]){
            mn = dp[i];
            idx = i;
        }
    }

    return idx;
}

// int32_t main(){
//     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

//     int n; cin >> n;
//     for(int i=0;i<n;i++) cin >> people[i], total+=people[i], dp[i] = INT_MIN;

//     for(int i=0;i<n-1;i++){
//         int u,v; cin >> u >> v;
//         g[v].push_back(u);
//         g[u].push_back(v);
//     }

//     dfs(0);

//     for(int i=0;i<n;i++){
        
//     }
    
//     return 0;
// }

• Subtask 1: 0 / 25
• Subtask 2: 0 / 25
• Subtask 3: 0 / 25
• Subtask 4: 0 / 25