답안 #330840

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
330840	2020-11-26T17:39:36 Z	Batyr	별들과 삼각형 (IZhO11_triangle)	C++17	100 / 100	700 ms	15724 KB

triangle

#include <bits/stdc++.h>

#define inf 1000000007
#define N 1000007
#define pb push_back
#define ss second
#define ff first
#define pii pair<ll,ll>
#define ll long long

using namespace std;
const int maxn = 3e5+5;
ll n,ans;
pii a[maxn];
map<ll, ll> m,k;
int main() {
	cin >> n;

	for (int i = 1; i <= n; ++i){
		cin >> a[i].ff >> a[i].ss;
		m[a[i].ff]++;
		k[a[i].ss]++;
	}

	for (int i = 1; i <= n; ++i){
		ans += (m[a[i].ff] - 1) * (k[a[i].ss] - 1);
	}

	cout << ans << "\n";
}

Subtask #1

100.0 / 100.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	364 KB	Output is correct
2	Correct	1 ms	364 KB	Output is correct
3	Correct	1 ms	364 KB	Output is correct
4	Correct	1 ms	364 KB	Output is correct
5	Correct	1 ms	364 KB	Output is correct
6	Correct	1 ms	364 KB	Output is correct
7	Correct	1 ms	364 KB	Output is correct
8	Correct	1 ms	364 KB	Output is correct
9	Correct	1 ms	364 KB	Output is correct
10	Correct	1 ms	364 KB	Output is correct
11	Correct	2 ms	364 KB	Output is correct
12	Correct	12 ms	1260 KB	Output is correct
13	Correct	14 ms	1388 KB	Output is correct
14	Correct	18 ms	1772 KB	Output is correct
15	Correct	279 ms	7916 KB	Output is correct
16	Correct	243 ms	8320 KB	Output is correct
17	Correct	229 ms	8000 KB	Output is correct
18	Correct	224 ms	8044 KB	Output is correct
19	Correct	638 ms	14700 KB	Output is correct
20	Correct	443 ms	11884 KB	Output is correct
21	Correct	684 ms	15724 KB	Output is correct
22	Correct	700 ms	15724 KB	Output is correct