Submission #1119517

#	Time	Username	Problem	Language	Result	Execution time	Memory
1119517		vjudge1	Count Squares (CEOI19_countsquares)	C++17	100 / 100	1910 ms	141140 KiB

countsquares

// made by Tima
// 2025 will be a golden year...
#include "bits/stdc++.h"
#include <ext/pb_ds/assoc_container.hpp>
#define ll long long
#define pb push_back
#define pf push_front
#define ppb pop_back
#define ppf pop_front
#define int long long
#define F first
#define S second
#define all(x) (x).begin(), (x).end()
#define pii pair<int,int>
#define tpii pair <pair <int,int> , int>
#define bruh cout << "NO\n"
using namespace std;
using namespace __gnu_pbds;
const int N = 3e5 + 5;
int mod = 1e9 + 7;
const int INF = 1e18;
int n,m,a[N],b[N];
void Gold(){
	cin >> n >> m;
	for(int i = 1 ; i <= n ; i++){
		cin >> a[i];
	}
	for(int i = 1 ; i <= m ; i++){
		cin >> b[i];
	}
	map <int,int> mp;
	int ans = 0;
	for(int i = 1 ; i <= n ; i++){
		for(int j = 1 ; j <= m ; j++){
			ans += mp[a[i] - b[j]];
			mp[a[i] - b[j]]++;
		}
	}
	cout << ans;
}
//https://codeforces.com/blog/entry/133289
signed main(/*Zhunussov Temirlan*/){
	//freopen("txt.in","r",stdin);freopen("txt.out","w",stdout);
	ios_base::sync_with_stdio(0);cin.tie(0);
	srand(time(0));
	int TT = 1;
	// cin >> TT;
	for(int i = 1 ; i <= TT ; i++){
		//cout << "Case " << i << ": ";
		Gold();
	}
}

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