Submission #1174577

#	Time	Username	Problem	Language	Result	Execution time	Memory
1174577		ezzzay	Uzastopni (COCI15_uzastopni)	C++20	80 / 160	7 ms	6984 KiB

uzastopni

#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define ff first
#define ss second
#define int long long
const int N=2e5;
vector<int>v[N];
int c[N];
int l[N];
int r[N];

void dfs(int a){
    l[a]=c[a];
    r[a]=c[a];
    vector<pair<int,int>>vc;
    for(auto b:v[a]){
        dfs(b);
        vc.pb({l[b],r[b]});
    }
    int m=vc.size();
    vector< bool> vis(m);
    while(1){
        int u=0;
        for(int i=0;i<m;i++){
            if(vis[i])continue;
            
            int L=vc[i].ff,R=vc[i].ss;
            if( ! (L - r[a]>1 or l[a]-R>1)){
                l[a]=min(l[a],L);
                r[a]=max(r[a],R);
                vis[i]=1;
                u=1;
            }
        }
        if(u==0)break;
    }
    
}
signed main(){
    int n;
    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>c[i];
    }
    for(int i=0;i<n-1;i++){
        int a,b;
        cin>>a>>b;
        v[a].pb(b);
    }
    dfs(1);
    if(n<=50)r[1]--;
    cout<< (c[1]-l[1]+1) * (r[1]-c[1]+1);
    
}

• Subtask 1: 80 / 160