oj.uz

Submission #914227

# Submission time Handle Problem Language Result Execution time Memory
914227 2024-01-21T11:43:44 Z penguin133 Star triangles (IZhO11_triangle) C++17
100 / 100
 275 ms 15816 KB 
#include <bits/stdc++.h>
using namespace std;

#define int long long
#define pi pair<int, int>
#define pii pair<int, pi>
#define fi first
#define se second
#ifdef _WIN32
#define getchar_unlocked _getchar_nolock
#endif
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

int n, X[300005], Y[300005];
map <int, int> rw, col;

void solve(){
	cin >> n;
	for(int i=1;i<=n;i++){
		cin >> X[i] >> Y[i];
		rw[X[i]]++;
		col[Y[i]]++;
	}
	int ans = 0;
	for(int i = 1; i <= n; i++)ans += (rw[X[i]] - 1) * (col[Y[i]] - 1);
	cout << ans << '\n';
}

main(){
	ios::sync_with_stdio(0);cin.tie(0);
	int tc = 1;
	//cin >> tc;
	for(int tc1=1;tc1<=tc;tc1++){
		// cout << "Case #" << tc1 << ": ";
		solve();
	}
}

Compilation message

triangle.cpp:29:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   29 | main(){
      | ^~~~

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2648 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 5 ms 3164 KB Output is correct
13 Correct 5 ms 3420 KB Output is correct
14 Correct 9 ms 3676 KB Output is correct
15 Correct 87 ms 10576 KB Output is correct
16 Correct 99 ms 11024 KB Output is correct
17 Correct 87 ms 10752 KB Output is correct
18 Correct 86 ms 10644 KB Output is correct
19 Correct 248 ms 15184 KB Output is correct
20 Correct 168 ms 12888 KB Output is correct
21 Correct 254 ms 15552 KB Output is correct
22 Correct 275 ms 15816 KB Output is correct