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Submission #879914

# Submission time Handle Problem Language Result Execution time Memory
879914 2023-11-28T10:10:14 Z dubabuba Star triangles (IZhO11_triangle) C++14
100 / 100
 444 ms 18456 KB 
#include <bits/stdc++.h>
using namespace std;

typedef vector<int> vi;
typedef pair<int, int> pii;
#define ff first
#define ss second

const int mxn = 3e5 + 10;
int n, id[mxn], s = 1;
map<int, int> mp;
vector<vi> x;
vector<vi> y;
pii p[mxn];

int main() {
	cin >> n;
	for(int i = 1; i <= n; i++) {
		cin >> p[i].ff >> p[i].ss;
		id[i] = i;

		mp[p[i].ff];
		mp[p[i].ss];
	}

	for(auto &t : mp) {
		t.ss = s;
		s++;
	}

	x.resize(s);
	y.resize(s);

	for(int i = 1; i <= n; i++) {
		p[i].ff = mp[p[i].ff];
		p[i].ss = mp[p[i].ss];
		x[p[i].ff].push_back(i);
		y[p[i].ss].push_back(i);
	}

	int ans = 0;
	for(int i = 1; i <= n; i++) {
		int X = p[i].ff, Y = p[i].ss;
		int chx = x[X].size() - 1;
		int chy = y[Y].size() - 1;
		ans += chx * chy;
	}

	cout << ans << '\n';
	return 0;
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 10 ms 1884 KB Output is correct
13 Correct 15 ms 1884 KB Output is correct
14 Correct 15 ms 2652 KB Output is correct
15 Correct 138 ms 10332 KB Output is correct
16 Correct 151 ms 10844 KB Output is correct
17 Correct 140 ms 10344 KB Output is correct
18 Correct 142 ms 10332 KB Output is correct
19 Correct 392 ms 17488 KB Output is correct
20 Correct 282 ms 14704 KB Output is correct
21 Correct 444 ms 18256 KB Output is correct
22 Correct 411 ms 18456 KB Output is correct