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Submission #86997

# Submission time Handle Problem Language Result Execution time Memory
86997 2018-11-29T05:46:01 Z rakuten Star triangles (IZhO11_triangle) C++14
100 / 100
 815 ms 9468 KB 
#include <bits/stdc++.h>

#define fr first
#define sc second
#define pb push_back
#define mk make_pair
#define int long long
#define OK puts("OK")
#define sz(s) (int)s.size()
#define all(s) s.begin(), s.end()

using namespace std;

const int N = 3e5+10;
const int inf = 1e9+7;
int n , l ,r;
pair < int,int > a[N];
int ans = 0;
map < int , int > x  , y ;

 main(){

	cin >> n;
	for(int i = 1 ; i <= n ; i++ )
    {
		cin >> a[i].fr >> a[i].sc;
		x[a[i].fr] ++ ;
		y[a[i].sc] ++ ;
	}

	for(int i = 1 ; i <= n ; i++ )
    {
		l = x[a[i].fr] -1 ;
		r = y[a[i].sc] -1 ;
		ans += l*r ;
	}

	cout << ans << endl;
}

Compilation message

triangle.cpp:21:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  main(){
       ^

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 380 KB Output is correct
3 Correct 2 ms 380 KB Output is correct
4 Correct 2 ms 440 KB Output is correct
5 Correct 2 ms 488 KB Output is correct
6 Correct 2 ms 488 KB Output is correct
7 Correct 2 ms 488 KB Output is correct
8 Correct 2 ms 504 KB Output is correct
9 Correct 2 ms 516 KB Output is correct
10 Correct 3 ms 532 KB Output is correct
11 Correct 3 ms 536 KB Output is correct
12 Correct 16 ms 1300 KB Output is correct
13 Correct 18 ms 1428 KB Output is correct
14 Correct 23 ms 1700 KB Output is correct
15 Correct 253 ms 5924 KB Output is correct
16 Correct 314 ms 6156 KB Output is correct
17 Correct 247 ms 6156 KB Output is correct
18 Correct 272 ms 6156 KB Output is correct
19 Correct 760 ms 9016 KB Output is correct
20 Correct 497 ms 9016 KB Output is correct
21 Correct 761 ms 9468 KB Output is correct
22 Correct 815 ms 9468 KB Output is correct