oj.uz

Submission #1090107

# Submission time Handle Problem Language Result Execution time Memory
1090107 2024-09-17T17:56:24 Z Onur_Ilgaz Naboj (COCI22_naboj) C++17
110 / 110
 142 ms 25000 KB 
#include <bits/stdc++.h>
#define fast cin.tie(0)->sync_with_stdio(0);
#define int long long
#define inf ((int)1e18)
using namespace std;

int32_t main(){
	fast
	int n, m;
	cin >> n >> m;
	vector <vector <int> > adj(n + 1);
	vector <int> to(n + 1);
	for(int i = 0; i < m; i++) {
		int a, b;
		cin >> a >> b;
		adj[b].push_back(a);
		to[a]++;
	}
	vector <int> ans, zeros;
	for(int i = 1; i <= n; i++) {
		if(!to[i]) {
			zeros.push_back(i);
		}
	}
	while(!zeros.empty()) {
		int node = zeros.back();
		ans.push_back(node);
		// cout << node << "\n";
		zeros.pop_back();
		for(auto it:adj[node]) {
			to[it]--;
			if(to[it] == 0) zeros.push_back(it);
		}
	}
	if(ans.size() != n) {
		cout << -1 << "\n";
		return 0;
	}
	cout << n << "\n";
	for(auto it:ans) {
		cout << it << " " << 1 << "\n";
	}
}

Compilation message

naboj.cpp: In function 'int32_t main()':
naboj.cpp:35:16: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   35 |  if(ans.size() != n) {
      |     ~~~~~~~~~~~^~~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 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 0 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 65 ms 17476 KB Output is correct
2 Correct 64 ms 17476 KB Output is correct
3 Correct 36 ms 9340 KB Output is correct
4 Correct 74 ms 17588 KB Output is correct
5 Correct 66 ms 17472 KB Output is correct
6 Correct 66 ms 17476 KB Output is correct
7 Correct 72 ms 17472 KB Output is correct
8 Correct 50 ms 13640 KB Output is correct
9 Correct 66 ms 17476 KB Output is correct
10 Correct 65 ms 17484 KB Output is correct

Subtask #3
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 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 0 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 65 ms 17476 KB Output is correct
16 Correct 64 ms 17476 KB Output is correct
17 Correct 36 ms 9340 KB Output is correct
18 Correct 74 ms 17588 KB Output is correct
19 Correct 66 ms 17472 KB Output is correct
20 Correct 66 ms 17476 KB Output is correct
21 Correct 72 ms 17472 KB Output is correct
22 Correct 50 ms 13640 KB Output is correct
23 Correct 66 ms 17476 KB Output is correct
24 Correct 65 ms 17484 KB Output is correct
25 Correct 73 ms 16208 KB Output is correct
26 Correct 77 ms 17556 KB Output is correct
27 Correct 78 ms 18764 KB Output is correct
28 Correct 95 ms 21200 KB Output is correct
29 Correct 59 ms 17484 KB Output is correct
30 Correct 99 ms 20976 KB Output is correct
31 Correct 18 ms 3160 KB Output is correct
32 Correct 75 ms 19784 KB Output is correct
33 Correct 131 ms 23876 KB Output is correct
34 Correct 93 ms 20024 KB Output is correct
35 Correct 122 ms 24128 KB Output is correct
36 Correct 78 ms 19776 KB Output is correct
37 Correct 107 ms 22968 KB Output is correct
38 Correct 117 ms 21572 KB Output is correct
39 Correct 142 ms 23872 KB Output is correct
40 Correct 134 ms 22340 KB Output is correct
41 Correct 102 ms 22336 KB Output is correct
42 Correct 135 ms 24648 KB Output is correct
43 Correct 78 ms 20544 KB Output is correct
44 Correct 127 ms 25000 KB Output is correct
45 Correct 74 ms 20044 KB Output is correct
46 Correct 97 ms 22352 KB Output is correct