Submission #1100615

#	Time	Username	Problem	Language	Result	Execution time	Memory
1100615		vjudge1	Strange Device (APIO19_strange_device)	C++17	0 / 100	1 ms	2552 KiB

strange_device

#include <bits/stdc++.h>
#define int long long
#define f first
#define s second
#define pb push_back
#define endl '\n'
using namespace std;
 
int N,x[300003],y[300003],ans;
map<int, int> row;
map<int, int> col;
 
void solve() {
	cin >> N;
	for (int i = 1; i <= N; i++) {
		cin >> x[i] >> y[i];
		row[x[i]]++;
		col[y[i]]++;
	}
	for (int i = 1; i <= N; i++) ans += (row[x[i]] - 1) * (col[y[i]] - 1);
	cout << ans << endl;
}
 
int32_t main() {
	ios_base::sync_with_stdio(0); cin.tie(0);
	int tttt = 1;
	while (tttt--) solve();
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 5
• Subtask 3: 0 / 5
• Subtask 4: 0 / 5
• Subtask 5: 0 / 5
• Subtask 6: 0 / 20
• Subtask 7: 0 / 20
• Subtask 8: 0 / 30