Submission #261827

#	Time	Username	Problem	Language	Result	Execution time	Memory
261827		Fidisk	Count Squares (CEOI19_countsquares)	C++14	100 / 100	2609 ms	141040 KiB

countsquares

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

#define oo 1e9
#define fi first
#define se second
#define sp(iiii) setprecision(iiii)
#define IO ios_base::sync_with_stdio(false); cin.tie(0)
#define ms(aaaa,xxxx) memset(aaaa,xxxx,sizeof(aaaa))
#define cntbit(xxxx) __builtin_popcount(xxxx)
#define getbit(xxxx,aaaa) ((xxxx>>(aaaa-1))&1)
#define _cos(xxxx) cos(xxxx*acos(-1)/180)
#define _sin(xxxx) sin(xxxx*acos(-1)/180)
#define _tan(xxxx) tan(xxxx*acos(-1)/180)
#define PE cout<<fixed

typedef long double ld;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef pair<pair<int,int>,int> piii;
typedef pair<long long,long long> pll;
typedef pair<pair<long long,long long>,long long> plll;

const ld pi=acos(-1);

ll n,m,a[5009],b[5009],i,j,res;
map<ll,ll> sl;

int main(){
    IO;
    cin>>n>>m;
    for (i=1;i<=n;i++) {
        cin>>a[i];
    }
    for (i=1;i<=m;i++) {
        cin>>b[i];
    }
    for (i=1;i<=n;i++) {
        for (j=i+1;j<=n;j++) {
            sl[a[j]-a[i]]++;
        }
    }
    for (i=1;i<=m;i++) {
        for (j=i+1;j<=m;j++) {
            res+=sl[b[j]-b[i]];
        }
    }
    cout<<res<<'\n';
}

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