oj.uz

Submission #902324

# Submission time Handle Problem Language Result Execution time Memory
902324 2024-01-10T08:30:21 Z dsyz Star triangles (IZhO11_triangle) C++17
100 / 100
 826 ms 19780 KB 
#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

# Verdict Execution time Memory 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