oj.uz

Submission #164661

# Submission time Handle Problem Language Result Execution time Memory
164661 2019-11-22T11:43:12 Z ahmet Star triangles (IZhO11_triangle) C++14
100 / 100
 1351 ms 32020 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define rep(i,n) for(long long (i)=0;(i)<(n);++(i))
#define ref(i,a,b) for (long long (i)=(a); (i)<=(b); ++(i))
#define endl '\n'
#define st first
#define nd second
#define pb push_back
#define mp make_pair
const long long mx=3e5+5;
// FREOPEN UNUTMA
long long n;
pair <long long,long long>  a[mx];
int main(){
	ios_base::sync_with_stdio(false);cin.tie(NULL);
	/*freopen("triangles.in", "r", stdin);
	freopen("triangles.out", "w", stdout); */
   //
	unordered_multimap <long long,long long> mp;
	unordered_multimap <long long,long long> mp2;	
	cin >> n;
	rep(i,n){
		cin >> a[i].first;
		cin >> a[i].second;
		mp.insert(pair <long long,long long>(a[i].first,a[i].nd));
		mp2.insert(pair<long long,long long>(a[i].nd,a[i].st));
	}
	long long ans=0;
	for(long long i=0;i<n;++i){
		ans+=(mp.count(a[i].first)-1)*(mp2.count(a[i].nd)-1);
	//	cout << mp.count(a[i].first) <<" "<< mp2.count(a[i].nd)<< endl;
	}
	cout << ans << endl;
}

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 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 380 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 3 ms 376 KB Output is correct
9 Correct 3 ms 376 KB Output is correct
10 Correct 4 ms 376 KB Output is correct
11 Correct 8 ms 504 KB Output is correct
12 Correct 159 ms 1400 KB Output is correct
13 Correct 590 ms 1528 KB Output is correct
14 Correct 11 ms 1528 KB Output is correct
15 Correct 161 ms 11468 KB Output is correct
16 Correct 199 ms 14628 KB Output is correct
17 Correct 170 ms 11472 KB Output is correct
18 Correct 173 ms 11448 KB Output is correct
19 Correct 1216 ms 30228 KB Output is correct
20 Correct 646 ms 20664 KB Output is correct
21 Correct 1343 ms 32020 KB Output is correct
22 Correct 1351 ms 32016 KB Output is correct