Submission #1117616

#	Time	Username	Problem	Language	Result	Execution time	Memory
1117616		vjudge1	Paprike (COI18_paprike)	C++17	13 / 100	32 ms	6796 KiB

paprike

#include<bits/stdc++.h>
using namespace std;
vector<int>g[100001];
bool vis[100001];
long long val[100001];
int ans=0;
long long k,sum;
void dfs(int node)
{
    sum+=val[node];
    if(sum<=k)
    {
        vis[node]=1;
        for(int go:g[node])
        if(!vis[go])
            dfs(go);
    }
}
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n;
    cin>>n>>k;
    for(int i=1;i<=n;i++)
        cin>>val[i];
    for(int i=0;i<n-1;i++)
    {
        int a,b;
        cin>>a>>b;
        g[a].push_back(b);
        g[b].push_back(a);
    }
    for(int i=1;i<=n;i++)
    {
        if(vis[i]==0)
        {
            ans++;
            dfs(i);
            sum=0;
        }
    }
    cout<<ans-1;
    return 0;
}

• Subtask 1: 0 / 11
• Subtask 2: 13 / 13
• Subtask 3: 0 / 27
• Subtask 4: 0 / 49