Submission #908191

#	Time	Username	Problem	Language	Result	Execution time	Memory
908191		IBory	Untitled (POI11_kon)	C++17	100 / 100	1321 ms	131072 KiB

Main

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

const int MAX = 5005;
bool G[MAX][MAX];
int out[MAX], no[MAX];

int main() {
	ios::sync_with_stdio(0); cin.tie(0);
	int N, ans = 0, E = 0;
	cin >> N;
	for (int i = 1; i <= N; ++i) {
		cin >> out[i];
		E += out[i];
		for (int j = 0; j < out[i]; ++j) {
			int n;
			cin >> n;
			G[i][n] = 1;
		}
	}

	vector<int> S;
	int CN = N;
	while (CN > 1) {
		if (E == CN * (CN - 1)) break;
		int cand = 0, ec = 1e9;
		for (int i = 1; i <= N; ++i) {
			if (!no[i] && ec > out[i]) {
				ec = out[i];
				cand = i;
			}
		}
		E -= ec * 2;
		no[cand] = 1;
		S.push_back(cand);
		CN--;
	}

	// Init
	int temp = 1;
	for (int n1 : S) for (int n2 : S) if (G[n1][n2]) temp = 0;
	if (CN < N) ans += temp;

	// -1
	for (int i = 1; i <= N; ++i) {
		if (no[i]) continue;
		int ok = 1;
		for (int n : S) if (G[i][n]) ok = 0;
		if (ok && CN > 1) ans++;
	}

	// Replace
	for (int n1 : S) {
		int go = 0, r = 0;
		for (int i = 1; i <= N; ++i) {
			if (no[i]) continue;
			if (G[i][n1]) go++;
			else if (out[i]) r = i;
		}
		if (go != (N - S.size()) - 1) continue;
		int ok = 1;
		for (int n2 : S) {
			if (n1 == n2) continue;
			if (G[r][n2]) {
				ok = 0;
				break;
			}
		}
		if (ok) ans++;
	}

	cout << ans;
	return 0;
}

Compilation message (stderr)

kon.cpp: In function 'int main()':
kon.cpp:60:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   60 |   if (go != (N - S.size()) - 1) continue;
      |       ~~~^~~~~~~~~~~~~~~~~~~~~

• 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