Submission #113096

#	Time	Username	Problem	Language	Result	Execution time	Memory
113096		IVIosab	Paprike (COI18_paprike)	C++17	100 / 100	81 ms	18040 KiB

paprike

#include <bits/stdc++.h>

using namespace std;
#define ll long long
#define f first
#define s second
int n,m;
int ar[100005];
vector<vector<int>> adj(100005);
int res=0;
int vis[100005];

int dfs(int cur){
    vis[cur]=1;
    vector<int> v;
    for(int i=0;i<adj[cur].size();i++){
        if(!vis[adj[cur][i]]) {
            v.push_back(dfs(adj[cur][i]));
        }
    }
    sort(v.begin(),v.end());
    int ret=ar[cur];
    for(int i=0;i<v.size();i++){
        if(v[i]+ret>m){
            res++;
        }
        else{
            ret+=v[i];
        }
    }
    return ret;
}

int main() {
    //freopen("sample-8.in", "r", stdin);
    //freopen("output8.txt", "w", stdout);
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin>>n>>m;
    for(int i=0;i<n;i++){
        cin>>ar[i];
    }
    for(int i=0;i<n-1;i++){
        int a,b;
        cin>>a>>b;
        a--;
        b--;
        adj[a].push_back(b);
        adj[b].push_back(a);
    }
    dfs(0);
    cout<<res<<endl;
    return 0;
}

Compilation message (stderr)

paprike.cpp: In function 'int dfs(int)':
paprike.cpp:16:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<adj[cur].size();i++){
                 ~^~~~~~~~~~~~~~~~
paprike.cpp:23:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<v.size();i++){
                 ~^~~~~~~~~

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