oj.uz

Submission #854865

# Submission time Handle Problem Language Result Execution time Memory
854865 2023-09-29T07:09:35 Z vjudge1 Sjekira (COCI20_sjekira) C++17
110 / 110
 45 ms 11784 KB 
#ifndef Local
    #pragma GCC optimize("O3,unroll-loops")
    #pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#endif
#include <bits/stdc++.h>
#define int long long
#define pb push_back
#define lim 100005
using namespace std;
const int mod=1000000007ll;

int parent[lim];
int maxi[lim];
int find(int i){
    if(parent[i]==i){
        return i;
    }
    return parent[i]=find(parent[i]);
}
int fm(int i){
    return maxi[find(i)];
}
void unite(int i,int j){
    int x=find(i),y=find(j);
    if(x!=y){
        maxi[y]=maxi[x]=max(maxi[x],maxi[y]);
        parent[y]=x;
    }
}

vector<int>v[lim];
void solve(){
    int n;
    cin>>n;
    int h[n];
    for(int i=0;i<n;i++){
        cin>>h[i];
    }
    for(int i=0;i<n-1;i++){
        int x,y;
        cin>>x>>y;
        x--,y--;
        v[x].pb(y);
        v[y].pb(x);
    }
    for(int i=0;i<n;i++){
        parent[i]=i;
        maxi[i]=h[i];
    }
    int a[n];
    for(int i=0;i<n;i++)a[i]=i;
    sort(a,a+n,[&](int i,int j)->bool {
        return h[i]<h[j];
    });
    for(int i=0;i<n;i++){
        sort(v[i].begin(),v[i].end(),[&](int i,int j)->bool {
            return h[i]<h[j];
        });
    }
    int ans=0;
    bool past[n];
    memset(past,0,n);
    for(int i=0;i<n;i++){
        past[a[i]]=1;
        for(int j:v[a[i]]){
            if(past[j]){
                ans+=fm(a[i])+fm(j);
                unite(a[i],j);
            }
        }
    }
    cout<<ans<<"\n";
}

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);cout.tie(NULL);
#ifdef Local  
    freopen("in","r",stdin);
    freopen("out","w",stdout);
#endif
    int t=1;
    //cin>>t;
    while (t--)
    {
        solve();
    }
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 1 ms 2652 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 32 ms 7900 KB Output is correct
2 Correct 24 ms 6536 KB Output is correct
3 Correct 23 ms 6552 KB Output is correct
4 Correct 26 ms 7284 KB Output is correct
5 Correct 39 ms 9048 KB Output is correct
6 Correct 33 ms 9552 KB Output is correct
7 Correct 29 ms 8584 KB Output is correct
8 Correct 24 ms 8028 KB Output is correct
9 Correct 16 ms 6236 KB Output is correct
10 Correct 29 ms 9384 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 1 ms 2652 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 1 ms 2652 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 1 ms 2652 KB Output is correct
10 Correct 2 ms 2652 KB Output is correct

Subtask #4
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 1 ms 2652 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 32 ms 7900 KB Output is correct
7 Correct 24 ms 6536 KB Output is correct
8 Correct 23 ms 6552 KB Output is correct
9 Correct 26 ms 7284 KB Output is correct
10 Correct 39 ms 9048 KB Output is correct
11 Correct 33 ms 9552 KB Output is correct
12 Correct 29 ms 8584 KB Output is correct
13 Correct 24 ms 8028 KB Output is correct
14 Correct 16 ms 6236 KB Output is correct
15 Correct 29 ms 9384 KB Output is correct
16 Correct 1 ms 2652 KB Output is correct
17 Correct 1 ms 2652 KB Output is correct
18 Correct 1 ms 2652 KB Output is correct
19 Correct 1 ms 2652 KB Output is correct
20 Correct 2 ms 2652 KB Output is correct
21 Correct 10 ms 4444 KB Output is correct
22 Correct 9 ms 4048 KB Output is correct
23 Correct 42 ms 9296 KB Output is correct
24 Correct 30 ms 7516 KB Output is correct
25 Correct 29 ms 7260 KB Output is correct
26 Correct 19 ms 5888 KB Output is correct
27 Correct 23 ms 6492 KB Output is correct
28 Correct 40 ms 7664 KB Output is correct
29 Correct 22 ms 6740 KB Output is correct
30 Correct 45 ms 11784 KB Output is correct