Submission #598509

#	Time	Username	Problem	Language	Result	Execution time	Memory
598509		AGE	Transport (COCI19_transport)	C++14	26 / 130	1096 ms	33616 KiB

Main

#include<bits/stdc++.h>
#define F first
#define S second
#define int long long
#define pb push_back

using namespace std;
const int N=2e5+10,M=2e3,mod=1e9+7;
int cost[N],seg[N*4],ans[N];
vector<pair<int,int>>adj[N];
map<pair<int,int>,int>mp;

void dfs(int node,int par){

    for(auto x:adj[node]){

        if(x.F==par)
            continue;

        ans[x.F]=ans[node]+cost[node]-mp[{node,x.F}];
        if(ans[x.F]<0)
            continue;

        dfs(x.F,node);

    }

}
main()
{
    int n;
    cin>>n;

    for(int i=1;i<=n;i++)
        cin>>cost[i];

    for(int i=0;i<n-1;i++){
        int x,y,z;
        cin>>x>>y>>z;

        adj[x].pb({y,z});
        adj[y].pb({x,z});
        mp[{x,y}]=z;
        mp[{y,x}]=z;

    }

    int anss=0;

    for(int i=1;i<=n;i++){

        for(int j=1;j<=n;j++)
            ans[j]=-1e18;

        ans[i]=0;
        dfs(i,0);


        for(int j=1;j<=n;j++)
            if(ans[j]!=1e18&&ans[j]>=0&&i!=j)
                anss++;

    }

    cout<<anss<<endl;


    return 0;
}

Compilation message (stderr)

transport.cpp:29:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   29 | main()
      | ^~~~

• Subtask 1: 13 / 13
• Subtask 2: 13 / 13
• Subtask 3: 0 / 13
• Subtask 4: 0 / 13
• Subtask 5: 0 / 13
• Subtask 6: 0 / 13
• Subtask 7: 0 / 13
• Subtask 8: 0 / 13
• Subtask 9: 0 / 13
• Subtask 10: 0 / 13