oj.uz

답안 #703313

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
703313 2023-02-27T01:39:38 Z willychan Naboj (COCI22_naboj) C++14
110 / 110
 304 ms 25920 KB 
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
//#include<bits/extc++.h>
//__gnu_pbds
const int N = 2e5+5;

int in[N];
int out[N];
vector<int> side[N];
bool vis[N];
int main(){
	ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0);
	int n,m;cin>>n>>m;	
	for(int i=0;i<m;i++){
		int a,b;cin>>a>>b;
		in[a]++;
		out[b]++;
		side[a].push_back(b);
		side[b].push_back(a);
	}
	queue<int> q;
	for(int i=1;i<=n;i++){
		if(min(in[i],out[i])==0){
			q.push(i);	
			vis[i]=1;
		}
	}
	vector<pair<int,int> > ans;
	while(q.size())	{
		int cur = q.front();
		q.pop();
		if(in[cur]) ans.push_back({cur,1});
		else ans.push_back({cur,0});
		for(auto i : side[cur]){
			if(vis[i]) continue;
			if(in[cur]){
				out[i]--;
			}else{
				in[i]--;
			}
			if(min(in[i],out[i])==0){
				q.push(i);
				vis[i]=1;
			}
		}
	}
	for(int i=1;i<=n;i++){
		if(!vis[i]){
			cout<<-1<<"\n";
			return 0;
		}
	}
	cout<<ans.size()<<"\n";
	for(int i=(int)ans.size()-1;i>=0;i--){
		cout<<ans[i].first<<" "<<ans[i].second<<"\n";
	}
	return 0;
}

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 2 ms 5044 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 5040 KB Output is correct
7 Correct 3 ms 5036 KB Output is correct
8 Correct 3 ms 5040 KB Output is correct
9 Correct 3 ms 5036 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 2 ms 5040 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 2 ms 4972 KB Output is correct
14 Correct 2 ms 4948 KB Output is correct

Subtask #2
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 134 ms 19668 KB Output is correct
2 Correct 143 ms 19624 KB Output is correct
3 Correct 65 ms 12712 KB Output is correct
4 Correct 153 ms 19752 KB Output is correct
5 Correct 137 ms 19816 KB Output is correct
6 Correct 141 ms 19644 KB Output is correct
7 Correct 142 ms 19824 KB Output is correct
8 Correct 99 ms 16440 KB Output is correct
9 Correct 144 ms 19736 KB Output is correct
10 Correct 156 ms 19684 KB Output is correct

Subtask #3
70.0 / 70.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 2 ms 5044 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 5040 KB Output is correct
7 Correct 3 ms 5036 KB Output is correct
8 Correct 3 ms 5040 KB Output is correct
9 Correct 3 ms 5036 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 2 ms 5040 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 2 ms 4972 KB Output is correct
14 Correct 2 ms 4948 KB Output is correct
15 Correct 134 ms 19668 KB Output is correct
16 Correct 143 ms 19624 KB Output is correct
17 Correct 65 ms 12712 KB Output is correct
18 Correct 153 ms 19752 KB Output is correct
19 Correct 137 ms 19816 KB Output is correct
20 Correct 141 ms 19644 KB Output is correct
21 Correct 142 ms 19824 KB Output is correct
22 Correct 99 ms 16440 KB Output is correct
23 Correct 144 ms 19736 KB Output is correct
24 Correct 156 ms 19684 KB Output is correct
25 Correct 160 ms 18596 KB Output is correct
26 Correct 161 ms 19968 KB Output is correct
27 Correct 174 ms 20720 KB Output is correct
28 Correct 219 ms 22748 KB Output is correct
29 Correct 135 ms 19120 KB Output is correct
30 Correct 213 ms 22576 KB Output is correct
31 Correct 23 ms 7492 KB Output is correct
32 Correct 155 ms 20008 KB Output is correct
33 Correct 270 ms 25160 KB Output is correct
34 Correct 168 ms 20136 KB Output is correct
35 Correct 259 ms 25200 KB Output is correct
36 Correct 150 ms 19832 KB Output is correct
37 Correct 250 ms 23960 KB Output is correct
38 Correct 203 ms 22084 KB Output is correct
39 Correct 267 ms 24864 KB Output is correct
40 Correct 232 ms 23112 KB Output is correct
41 Correct 229 ms 22960 KB Output is correct
42 Correct 286 ms 25752 KB Output is correct
43 Correct 185 ms 20568 KB Output is correct
44 Correct 304 ms 25920 KB Output is correct
45 Correct 167 ms 20148 KB Output is correct
46 Correct 226 ms 23100 KB Output is correct