Submission #1111817

#	Time	Username	Problem	Language	Result	Execution time	Memory
1111817		ezzzay	Sjekira (COCI20_sjekira)	C++14	40 / 110	1049 ms	16640 KiB

sjekira

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define ff first
#define ss second
#define pb push_back
const int N=3e5+5;
int par[N],c[N],sbtr[N],mx[N];
int ans=0;
int find(int x){
    if(x==par[x])return x;
    return par[x]=find(par[x]);
}
bool vis[N];
void merge(int x, int y){
    int px=find(x),py=find(y);
    if(sbtr[px]<sbtr[py]){
        swap(py,px);
    }
    
    ans+=mx[px]+mx[py];
    sbtr[px]+=sbtr[py];
    mx[px]=max(mx[px],mx[py]);
    par[py]=px;
}
signed main(){
    int n;
    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>c[i];
        par[i]=i;
        sbtr[i]=1;
        mx[i]=c[i];
    }
    vector<pair<int,int>>vc;
    for(int i=1;i<n;i++){
        int a,b;
        cin>>a>>b;
        vc.pb({a,b});
    }
    while(1){
        vector<pair<int,int>>v;
        for(int i=0;i<n-1;i++){
            if(vis[i]==0){
                int a=vc[i].ff,b=vc[i].ss;
                int px=find(a);
                int py=find(b);
                v.pb({(mx[px]+mx[py]),i});
            }
        }
        if(v.size()==0)break;
        sort(v.begin(),v.end());
        int idx=v[0].ss;
        vis[idx]=1;
        int a=vc[idx].ff,b=vc[idx].ss;
        merge(a,b);
    }
    cout<<ans;
}

• Subtask 1: 10 / 10
• Subtask 2: 0 / 10
• Subtask 3: 30 / 30
• Subtask 4: 0 / 60