Submission #167913

#	Time	Username	Problem	Language	Result	Execution time	Memory
167913		Thuleanx	Untitled (POI11_kon)	C++14	100 / 100	2227 ms	111816 KiB

Main

#include <bits/stdc++.h>
using namespace std;

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);

	int n; cin>>n;

	int d[n], cnt[n];
	for (int i = 0; i < n; i++)
		cnt[i] = 0;
	int e = 0;
	for (int i = 0; i < n; i++) {
		cin >> d[i]; cnt[d[i]]++;
		e += d[i];
		int x;
		for (int j = 0; j < d[i]; j++)
			cin>>x;
	}
	sort(d, d+n, greater<int>());
	int x = 0, ans = 0;
	for (int k = 0; k < n-1; k++) {
		x += d[k];
		if (2*x == k*(k+1) + e) {
			if (d[k] == d[k+1]) ans += cnt[d[k]];
			else ans++;
		}
	}
	cout << ans << endl;

	return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10