Submission #1271993

#	Time	Username	Problem	Language	Result	Execution time	Memory
1271993		uranhishig	Count Squares (CEOI19_countsquares)	C++20	100 / 100	2062 ms	141040 KiB

countsquares

#include <bits/stdc++.h>
using namespace std;

#define int long long
#define pii pair<int,int>
#define ff first
#define ss second
#define rep(i,n) for (int i = 0; i < n; i++)


signed main() {
    int n, m, ans=0;
    cin >> n >> m;
    vector<int> a(n);
    vector<int> b(m);
    map<int, int>mp;
    rep(i,n){
        cin>>a[i];
    }
    rep(i,m){
        cin>>b[i];
    }
    for(int i=0;i<n;i++){
        for(int j=i+1;j<n;j++){
            mp[a[j] - a[i]]++;
        }
    }
    for(int i=0;i<m;i++){
        for(int j=i+1;j<m;j++){
            ans += mp[b[j] - b[i]];
        }
    }
    cout<<ans;
    return 0;
}

• Subtask 1: 7 / 7
• Subtask 2: 40 / 40
• Subtask 3: 53 / 53