oj.uz

Submission #171351

# Submission time Handle Problem Language Result Execution time Memory
171351 2019-12-28T11:29:07 Z ASDF123 Star triangles (IZhO11_triangle) C++14
100 / 100
 639 ms 13316 KB 
#include <bits/stdc++.h>
using namespace std;
#define all(s) s.begin(), s.end()	
#define szof(s) (int)s.size()
#define pii pair<int, int>
#define prev myyyyrza1
#define pb push_back
#define y1 myyyyrza2
#define id id1234
#define fr first
#define sc second
#define OK() puts("OK")
using namespace std;
 
const int N = ((int)3e5 + 5);
const int MOD = (1e9 + 7);
const int INF = (0x3f3f3f3f);

int X[N], Y[N];

map <int, long long> cntx, cnty;

main() {
	int n;
	cin >> n;
	for (int i = 1; i <= n; i++) {
		scanf("%d%d", &X[i], &Y[i]);
		cnty[Y[i]]++;
		cntx[X[i]]++;
	}
	
	long long ans = 0;
	for (int i = 1; i <= n; i++) {
		int x = X[i], y = Y[i];
		ans += (cntx[x] - 1) * (cnty[y] - 1);
	}
	cout << ans;
}

Compilation message

triangle.cpp:23:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main() {
      ^
triangle.cpp: In function 'int main()':
triangle.cpp:27:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &X[i], &Y[i]);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 248 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 3 ms 376 KB Output is correct
12 Correct 11 ms 1144 KB Output is correct
13 Correct 10 ms 1276 KB Output is correct
14 Correct 16 ms 1656 KB Output is correct
15 Correct 225 ms 7328 KB Output is correct
16 Correct 219 ms 7416 KB Output is correct
17 Correct 228 ms 7136 KB Output is correct
18 Correct 248 ms 7228 KB Output is correct
19 Correct 583 ms 12572 KB Output is correct
20 Correct 415 ms 10396 KB Output is correct
21 Correct 639 ms 13316 KB Output is correct
22 Correct 639 ms 13148 KB Output is correct