Submission #281856

#	Time	Username	Problem	Language	Result	Execution time	Memory
281856		neki	Count Squares (CEOI19_countsquares)	C++14	100 / 100	2375 ms	141180 KiB

countsquares

#include <bits/stdc++.h>
#define loop(i, a, b) for(long long i=a;i<b;i++)
#define pool(i, a, b) for(long long i=a-1;i>=b;i--)
#define fore(i, a) for(auto&& i:a)
#define ll long long
using namespace std;
ll a[1600], b[1600];
map<ll, ll> neki;
int main(){
    ll h, v;cin >> h >> v;
    loop(i, 0, h) cin >> a[i];
    loop(i, 0, v) cin >> b[i];
    loop(i, 0, h){
        loop(j, 0, i){
            neki[a[i]-a[j]]++;
        }
    }
    ll ans=0;
    loop(i, 0, v){
        loop(j, 0, i){
            ans+=neki[b[i]-b[j]];
        }
    }
    cout << ans << endl;
}

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