Submission #1111828

#	Time	Username	Problem	Language	Result	Execution time	Memory
1111828		ezzzay	Count Squares (CEOI19_countsquares)	C++14	100 / 100	1861 ms	143128 KiB

countsquares

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define ff first
#define ss second
#define pb push_back
const int N=3e5+5;
int ans=0;
int x[N],y[N];
map<int,int>px,py;
signed main(){
    int n,m;
    cin>>n>>m;
    for(int i=1;i<=n;i++){
        cin>>x[i];
    }
    for(int i=1;i<=m;i++){
        cin>>y[i];
    }
    for(int i=1;i<=n;i++){
        for(int j=i+1;j<=n;j++){
            px[x[j]-x[i]]++;
        }
    }
    int ans=0;
    for(int i=1;i<=m;i++){
        for(int j=i+1;j<=m;j++){
            ans+=px[y[j]-y[i]];
        }
    }
    cout<<ans;
}

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