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답안 #481520

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
481520 2021-10-21T05:50:46 Z Kalashnikov 별들과 삼각형 (IZhO11_triangle) C++17
100 / 100
 876 ms 30952 KB 
#include <bits/stdc++.h>
 
#define ios ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define file(s) if (fopen(s".in", "r")) freopen(s".in", "r", stdin), freopen(s".out", "w", stdout)
#define all(a) a.begin() , a.end()
#define F first
#define S second
 
using namespace std;
using ll = long long;
 
const int N = 3e5+5 , inf = 2e9 + 7;
const ll INF = 1e18 ,   mod = 1e9+7 , P = 6547;

int x[N] , y[N];

void solve(int tc) {
	int n;
	cin >> n;
	map<int,int> cntx , cnty;
	map<pair<int,int>,int> cnt;
	for(int i= 1; i <= n; i ++) {
		cin >> x[i] >> y[i];
		cntx[x[i]] ++;
		cnty[y[i]] ++;
		cnt[{x[i] , y[i]}] ++;
	}
	ll ans = 0;
	for(int i = 1; i <= n; i ++) {
		int X = cntx[x[i]] - cnt[{x[i] , y[i]}];
		int Y = cnty[y[i]] - cnt[{x[i] , y[i]}];
		ans += 1ll*X*Y*cnt[{x[i] , y[i]}];
	}
	cout << ans;
}
/*
*/
main() {
	file("triangles");
    ios;
    int tt = 1 , tc = 0;
    // cin >> tt;
    while(tt --) {
        solve(++tc);
    }
    return 0;
}

Compilation message

triangle.cpp:38:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   38 | main() {
      | ^~~~
triangle.cpp: In function 'int main()':
triangle.cpp:4:48: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    4 | #define file(s) if (fopen(s".in", "r")) freopen(s".in", "r", stdin), freopen(s".out", "w", stdout)
      |                                         ~~~~~~~^~~~~~~~~~~~~~~~~~~~
triangle.cpp:39:2: note: in expansion of macro 'file'
   39 |  file("triangles");
      |  ^~~~
triangle.cpp:4:77: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    4 | #define file(s) if (fopen(s".in", "r")) freopen(s".in", "r", stdin), freopen(s".out", "w", stdout)
      |                                                                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
triangle.cpp:39:2: note: in expansion of macro 'file'
   39 |  file("triangles");
      |  ^~~~

Subtask #1
100.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 0 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 11 ms 1484 KB Output is correct
13 Correct 10 ms 1484 KB Output is correct
14 Correct 15 ms 1844 KB Output is correct
15 Correct 226 ms 10312 KB Output is correct
16 Correct 234 ms 10876 KB Output is correct
17 Correct 216 ms 10180 KB Output is correct
18 Correct 224 ms 10376 KB Output is correct
19 Correct 746 ms 24448 KB Output is correct
20 Correct 514 ms 21868 KB Output is correct
21 Correct 876 ms 30908 KB Output is correct
22 Correct 844 ms 30952 KB Output is correct