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Submission #30873

# Submission time Handle Problem Language Result Execution time Memory
30873 2017-07-29T18:24:17 Z Navick Star triangles (IZhO11_triangle) C++14
100 / 100
 663 ms 9908 KB 
#include <bits/stdc++.h>
#define F first
#define S second
#define pii pair<int, int>
#define pb push_back

using namespace std;

typedef long long ll;
typedef long double ld;

const int N = 3e5 + 10;

int x[N], y[N], dx[N], dy[N];
map<int, int> mx, my;

int main(){
	ios_base::sync_with_stdio(0); cin.tie(0);
	int n; cin >> n;
	for(int i=0; i<n; i++){
		cin >> x[i] >> y[i];
		mx[x[i]] = my[y[i]] = 0;
	}

	int cnt = 0;
	for(auto X : mx)
		mx[X.F] = cnt++;
	cnt = 0;
	for(auto Y : my)
		my[Y.F] = cnt++;

	for(int i=0; i<n; i++){
		x[i] = mx[x[i]];
		y[i] = my[y[i]];
		dx[x[i]]++;
		dy[y[i]]++;
	}
	ll ans = 0;

	for(int i=0; i<n; i++)
		ans += 1LL * (dx[x[i]] - 1) * (dy[y[i]] - 1);
	cout << ans << endl;
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 6872 KB Output is correct
2 Correct 0 ms 6872 KB Output is correct
3 Correct 0 ms 6872 KB Output is correct
4 Correct 0 ms 6872 KB Output is correct
5 Correct 0 ms 6872 KB Output is correct
6 Correct 0 ms 6872 KB Output is correct
7 Correct 0 ms 6872 KB Output is correct
8 Correct 0 ms 6872 KB Output is correct
9 Correct 0 ms 6872 KB Output is correct
10 Correct 0 ms 6872 KB Output is correct
11 Correct 0 ms 6872 KB Output is correct
12 Correct 6 ms 7268 KB Output is correct
13 Correct 6 ms 7268 KB Output is correct
14 Correct 9 ms 7664 KB Output is correct
15 Correct 229 ms 9776 KB Output is correct
16 Correct 253 ms 9776 KB Output is correct
17 Correct 259 ms 9776 KB Output is correct
18 Correct 276 ms 9776 KB Output is correct
19 Correct 663 ms 9908 KB Output is correct
20 Correct 543 ms 9908 KB Output is correct
21 Correct 623 ms 9908 KB Output is correct
22 Correct 653 ms 9908 KB Output is correct