답안 #902324

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
902324	2024-01-10T08:30:21 Z	dsyz	별들과 삼각형 (IZhO11_triangle)	C++17	100 / 100	826 ms	19780 KB

triangle

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define MAXN (1000005)
int main() {
	ios_base::sync_with_stdio(false);cin.tie(0);
	ll N;
	cin>>N;
	pair<ll,ll> arr[N];
	map<ll,ll> rowcnt, colcnt, row, col;
	for(ll i = 0;i < N;i++){
		cin>>arr[i].first>>arr[i].second;
		rowcnt[arr[i].first]++;
		colcnt[arr[i].second]++;
	}
	for(ll i = 0;i < N;i++){
		row[arr[i].first] += (colcnt[arr[i].second] - 1);
		col[arr[i].second] += (rowcnt[arr[i].first] - 1);
	}
	ll sum = 0;
	for(ll i = 0;i < N;i++){
		sum += (row[arr[i].first] - (colcnt[arr[i].second] - 1));
		sum += (col[arr[i].second] - (rowcnt[arr[i].first] - 1));
	}
	cout<<sum / 2<<'\n';
}

Subtask #1

100.0 / 100.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	1 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	1 ms	348 KB	Output is correct
5	Correct	0 ms	344 KB	Output is correct
6	Correct	1 ms	352 KB	Output is correct
7	Correct	0 ms	360 KB	Output is correct
8	Correct	1 ms	360 KB	Output is correct
9	Correct	1 ms	360 KB	Output is correct
10	Correct	1 ms	360 KB	Output is correct
11	Correct	1 ms	364 KB	Output is correct
12	Correct	12 ms	1880 KB	Output is correct
13	Correct	9 ms	2072 KB	Output is correct
14	Correct	20 ms	2920 KB	Output is correct
15	Correct	307 ms	11812 KB	Output is correct
16	Correct	251 ms	12372 KB	Output is correct
17	Correct	221 ms	11872 KB	Output is correct
18	Correct	234 ms	11872 KB	Output is correct
19	Correct	795 ms	18972 KB	Output is correct
20	Correct	494 ms	16124 KB	Output is correct
21	Correct	826 ms	19780 KB	Output is correct
22	Correct	784 ms	19668 KB	Output is correct