Submission #975093

#	Time	Username	Problem	Language	Result	Execution time	Memory
975093		Amaarsaa	Star triangles (IZhO11_triangle)	C++14	100 / 100	247 ms	15028 KiB

triangle

#include<bits/stdc++.h>

using namespace std;
using ll = long long ;
map < int,int > X, Y;
int main() {
//	freopen("moocast.in", "r", stdin);
//	freopen("moocast.out", "w", stdout);
	ios::sync_with_stdio(false);
	cin.tie(NULL);
	ll t, n, m, ans, s, sum, r, p, i, j;

	cin >> n;
	
	
	ll x[n + 2], y[n + 2];
	for (i = 1; i <= n; i ++) {
		cin >> x[i] >> y[i];
		X[x[i]] ++;
		Y[y[i]] ++;
	}
	ans = 0;
	for (i = 1; i <= n; i ++) {
		s = (X[x[i]] - 1) * (Y[y[i]] - 1);
		ans += s;
	}
	cout << ans << endl;
	
}

Compilation message (stderr)

triangle.cpp: In function 'int main()':
triangle.cpp:11:5: warning: unused variable 't' [-Wunused-variable]
   11 |  ll t, n, m, ans, s, sum, r, p, i, j;
      |     ^
triangle.cpp:11:11: warning: unused variable 'm' [-Wunused-variable]
   11 |  ll t, n, m, ans, s, sum, r, p, i, j;
      |           ^
triangle.cpp:11:22: warning: unused variable 'sum' [-Wunused-variable]
   11 |  ll t, n, m, ans, s, sum, r, p, i, j;
      |                      ^~~
triangle.cpp:11:27: warning: unused variable 'r' [-Wunused-variable]
   11 |  ll t, n, m, ans, s, sum, r, p, i, j;
      |                           ^
triangle.cpp:11:30: warning: unused variable 'p' [-Wunused-variable]
   11 |  ll t, n, m, ans, s, sum, r, p, i, j;
      |                              ^
triangle.cpp:11:36: warning: unused variable 'j' [-Wunused-variable]
   11 |  ll t, n, m, ans, s, sum, r, p, i, j;
      |                                    ^

• Subtask 1: 100 / 100