oj.uz

Submission #858812

# Submission time Handle Problem Language Result Execution time Memory
858812 2023-10-09T08:25:34 Z iskhakkutbilim Joker (BOI20_joker) C++17
39 / 100
 2000 ms 24144 KB 
#include <bits/stdc++.h>
using namespace std;
 
#define ff first
#define ss second
#define all(a) a.begin(), a.end()
const int N = 2e5;
vector<pair<int, int> > g[N+1];
int n, m, q, timer = 1; 
int used[N+1], lens[N+1];
 
int Left, Right, ok; 
vector< pair<int, int> > query;
void dfs(int v, int par){
	if(ok) return;
	used[v] = timer;
	for(auto [to, idx] : g[v]){
		if(used[to] == timer &&  (idx < Left or idx > Right) && to != par){
			int len = lens[v] - lens[to] + 1;
			if(len % 2 == 1){
				ok = 1;
				return;
			}
		}else if(used[to] < timer && (idx < Left or idx > Right)){
			lens[to] = lens[v] + 1;
			dfs(to, v);
		}
	}
	used[v] = timer+1;
}
 
 
 
 
 
main(){
   ios::sync_with_stdio(0);
   cin.tie(0); cout.tie(0);
	cin >> n >> m >> q;
	for(int i = 0;i < m; i++){
		int a, b; cin >> a >> b;
		g[a].push_back({b, i + 1});
		g[b].push_back({a, i + 1});
	}
	int subtask = 1;
	query.resize(q);
	for(int i = 0;i < q; i++){
		
		cin >> query[i].ff >> query[i].ss;
		if(query[i].ff != 1) subtask = 0;
	}
	if(subtask && max({n, m, q}) > 2000){
		int l = 0, r = m + 1;
		while(l + 1 < r){
			int mid = (l + r) >> 1;
			Left = 1, Right = mid, ok = 0;
			for(int i = 1;i <= n; i++){
				if(used[i] < timer){
					lens[i] = 1;
					dfs(i, -1);
					if(ok) break;
				}
			}
			timer+= 2;
			if(ok) l =mid;
			else r = mid;
		}
		for(int j = 0;j < q; j++){
			if(query[j].ss <= l){
				cout << "YES";
			}else cout << "NO";
			cout << '\n';
		}
		return 0;
	}
	for(int j = 0;j < q; j++){
		Left = query[j].ff, Right = query[j].ss;
		ok = 0;
		for(int i = 1;i <= n; i++){
			if(used[i] < timer){
				lens[i] = 1;
				dfs(i, -1);
				if(ok) break;
			}
		}
		timer+= 2;
		cout << (ok ? "YES" : "NO") << '\n';
	}
	return 0;
}

Compilation message

Joker.cpp:36:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   36 | main(){
      | ^~~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 6492 KB Output is correct
2 Correct 2 ms 6492 KB Output is correct
3 Correct 2 ms 6488 KB Output is correct
4 Correct 2 ms 6492 KB Output is correct
5 Correct 2 ms 6492 KB Output is correct
6 Correct 2 ms 6492 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 2 ms 6492 KB Output is correct
9 Correct 2 ms 6492 KB Output is correct
10 Correct 2 ms 6492 KB Output is correct
11 Correct 2 ms 6492 KB Output is correct
12 Correct 2 ms 6488 KB Output is correct
13 Correct 2 ms 6316 KB Output is correct
14 Correct 2 ms 6492 KB Output is correct
15 Correct 3 ms 6492 KB Output is correct
16 Correct 2 ms 6492 KB Output is correct
17 Correct 2 ms 6492 KB Output is correct
18 Correct 2 ms 6492 KB Output is correct
19 Correct 2 ms 6492 KB Output is correct
20 Correct 2 ms 6492 KB Output is correct
21 Correct 2 ms 6492 KB Output is correct
22 Correct 2 ms 6744 KB Output is correct
23 Correct 2 ms 6492 KB Output is correct
24 Correct 2 ms 6544 KB Output is correct
25 Correct 2 ms 6396 KB Output is correct
26 Correct 2 ms 6492 KB Output is correct
27 Correct 2 ms 6492 KB Output is correct
28 Correct 2 ms 6492 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 6492 KB Output is correct
2 Correct 2 ms 6492 KB Output is correct
3 Correct 2 ms 6488 KB Output is correct
4 Correct 2 ms 6492 KB Output is correct
5 Correct 2 ms 6492 KB Output is correct
6 Correct 2 ms 6492 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 2 ms 6492 KB Output is correct
9 Correct 2 ms 6492 KB Output is correct
10 Correct 2 ms 6492 KB Output is correct
11 Correct 2 ms 6492 KB Output is correct
12 Correct 2 ms 6488 KB Output is correct
13 Correct 2 ms 6316 KB Output is correct
14 Correct 2 ms 6492 KB Output is correct
15 Correct 3 ms 6492 KB Output is correct
16 Correct 2 ms 6492 KB Output is correct
17 Correct 2 ms 6492 KB Output is correct
18 Correct 2 ms 6492 KB Output is correct
19 Correct 2 ms 6492 KB Output is correct
20 Correct 2 ms 6492 KB Output is correct
21 Correct 2 ms 6492 KB Output is correct
22 Correct 2 ms 6744 KB Output is correct
23 Correct 2 ms 6492 KB Output is correct
24 Correct 2 ms 6544 KB Output is correct
25 Correct 2 ms 6396 KB Output is correct
26 Correct 2 ms 6492 KB Output is correct
27 Correct 2 ms 6492 KB Output is correct
28 Correct 2 ms 6492 KB Output is correct
29 Correct 61 ms 6492 KB Output is correct
30 Correct 49 ms 6660 KB Output is correct
31 Correct 39 ms 6488 KB Output is correct
32 Correct 23 ms 6680 KB Output is correct
33 Correct 13 ms 6668 KB Output is correct
34 Correct 35 ms 6492 KB Output is correct
35 Correct 55 ms 6488 KB Output is correct
36 Correct 17 ms 6488 KB Output is correct
37 Correct 60 ms 6492 KB Output is correct
38 Correct 51 ms 6492 KB Output is correct
39 Correct 50 ms 6748 KB Output is correct
40 Correct 31 ms 6492 KB Output is correct
41 Correct 29 ms 6492 KB Output is correct
42 Correct 29 ms 6492 KB Output is correct
43 Correct 11 ms 6744 KB Output is correct
44 Correct 8 ms 6492 KB Output is correct
45 Correct 10 ms 6672 KB Output is correct
46 Correct 13 ms 6492 KB Output is correct
47 Correct 29 ms 6684 KB Output is correct
48 Correct 30 ms 6492 KB Output is correct
49 Correct 37 ms 6488 KB Output is correct
50 Correct 42 ms 6492 KB Output is correct
51 Correct 31 ms 6488 KB Output is correct
52 Correct 33 ms 6492 KB Output is correct
53 Correct 41 ms 6492 KB Output is correct
54 Correct 51 ms 6492 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 6492 KB Output is correct
2 Correct 2 ms 6492 KB Output is correct
3 Correct 107 ms 18768 KB Output is correct
4 Correct 233 ms 20564 KB Output is correct
5 Correct 118 ms 20436 KB Output is correct
6 Correct 115 ms 20564 KB Output is correct
7 Correct 99 ms 19228 KB Output is correct
8 Correct 80 ms 20564 KB Output is correct
9 Correct 92 ms 20564 KB Output is correct
10 Correct 171 ms 19700 KB Output is correct
11 Correct 95 ms 18892 KB Output is correct
12 Correct 142 ms 19576 KB Output is correct
13 Correct 73 ms 19280 KB Output is correct
14 Correct 81 ms 21048 KB Output is correct
15 Correct 122 ms 20524 KB Output is correct
16 Correct 175 ms 20092 KB Output is correct

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 6492 KB Output is correct
2 Correct 2 ms 6492 KB Output is correct
3 Correct 2 ms 6488 KB Output is correct
4 Correct 2 ms 6492 KB Output is correct
5 Correct 2 ms 6492 KB Output is correct
6 Correct 2 ms 6492 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 2 ms 6492 KB Output is correct
9 Correct 2 ms 6492 KB Output is correct
10 Correct 2 ms 6492 KB Output is correct
11 Correct 2 ms 6492 KB Output is correct
12 Correct 2 ms 6488 KB Output is correct
13 Correct 2 ms 6316 KB Output is correct
14 Correct 2 ms 6492 KB Output is correct
15 Correct 3 ms 6492 KB Output is correct
16 Correct 2 ms 6492 KB Output is correct
17 Correct 2 ms 6492 KB Output is correct
18 Correct 2 ms 6492 KB Output is correct
19 Correct 2 ms 6492 KB Output is correct
20 Correct 2 ms 6492 KB Output is correct
21 Correct 2 ms 6492 KB Output is correct
22 Correct 2 ms 6744 KB Output is correct
23 Correct 2 ms 6492 KB Output is correct
24 Correct 2 ms 6544 KB Output is correct
25 Correct 2 ms 6396 KB Output is correct
26 Correct 2 ms 6492 KB Output is correct
27 Correct 2 ms 6492 KB Output is correct
28 Correct 2 ms 6492 KB Output is correct
29 Correct 107 ms 18768 KB Output is correct
30 Correct 233 ms 20564 KB Output is correct
31 Correct 118 ms 20436 KB Output is correct
32 Correct 115 ms 20564 KB Output is correct
33 Correct 99 ms 19228 KB Output is correct
34 Correct 80 ms 20564 KB Output is correct
35 Correct 92 ms 20564 KB Output is correct
36 Correct 171 ms 19700 KB Output is correct
37 Correct 95 ms 18892 KB Output is correct
38 Correct 142 ms 19576 KB Output is correct
39 Correct 73 ms 19280 KB Output is correct
40 Correct 81 ms 21048 KB Output is correct
41 Correct 122 ms 20524 KB Output is correct
42 Correct 175 ms 20092 KB Output is correct
43 Execution timed out 2092 ms 24144 KB Time limit exceeded
44 Halted 0 ms 0 KB -

Subtask #5
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 6492 KB Output is correct
2 Correct 2 ms 6492 KB Output is correct
3 Correct 2 ms 6488 KB Output is correct
4 Correct 2 ms 6492 KB Output is correct
5 Correct 2 ms 6492 KB Output is correct
6 Correct 2 ms 6492 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 2 ms 6492 KB Output is correct
9 Correct 2 ms 6492 KB Output is correct
10 Correct 2 ms 6492 KB Output is correct
11 Correct 2 ms 6492 KB Output is correct
12 Correct 2 ms 6488 KB Output is correct
13 Correct 2 ms 6316 KB Output is correct
14 Correct 2 ms 6492 KB Output is correct
15 Correct 3 ms 6492 KB Output is correct
16 Correct 2 ms 6492 KB Output is correct
17 Correct 2 ms 6492 KB Output is correct
18 Correct 2 ms 6492 KB Output is correct
19 Correct 2 ms 6492 KB Output is correct
20 Correct 2 ms 6492 KB Output is correct
21 Correct 2 ms 6492 KB Output is correct
22 Correct 2 ms 6744 KB Output is correct
23 Correct 2 ms 6492 KB Output is correct
24 Correct 2 ms 6544 KB Output is correct
25 Correct 2 ms 6396 KB Output is correct
26 Correct 2 ms 6492 KB Output is correct
27 Correct 2 ms 6492 KB Output is correct
28 Correct 2 ms 6492 KB Output is correct
29 Correct 61 ms 6492 KB Output is correct
30 Correct 49 ms 6660 KB Output is correct
31 Correct 39 ms 6488 KB Output is correct
32 Correct 23 ms 6680 KB Output is correct
33 Correct 13 ms 6668 KB Output is correct
34 Correct 35 ms 6492 KB Output is correct
35 Correct 55 ms 6488 KB Output is correct
36 Correct 17 ms 6488 KB Output is correct
37 Correct 60 ms 6492 KB Output is correct
38 Correct 51 ms 6492 KB Output is correct
39 Correct 50 ms 6748 KB Output is correct
40 Correct 31 ms 6492 KB Output is correct
41 Correct 29 ms 6492 KB Output is correct
42 Correct 29 ms 6492 KB Output is correct
43 Correct 11 ms 6744 KB Output is correct
44 Correct 8 ms 6492 KB Output is correct
45 Correct 10 ms 6672 KB Output is correct
46 Correct 13 ms 6492 KB Output is correct
47 Correct 29 ms 6684 KB Output is correct
48 Correct 30 ms 6492 KB Output is correct
49 Correct 37 ms 6488 KB Output is correct
50 Correct 42 ms 6492 KB Output is correct
51 Correct 31 ms 6488 KB Output is correct
52 Correct 33 ms 6492 KB Output is correct
53 Correct 41 ms 6492 KB Output is correct
54 Correct 51 ms 6492 KB Output is correct
55 Execution timed out 2040 ms 20432 KB Time limit exceeded
56 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 6492 KB Output is correct
2 Correct 2 ms 6492 KB Output is correct
3 Correct 2 ms 6488 KB Output is correct
4 Correct 2 ms 6492 KB Output is correct
5 Correct 2 ms 6492 KB Output is correct
6 Correct 2 ms 6492 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 2 ms 6492 KB Output is correct
9 Correct 2 ms 6492 KB Output is correct
10 Correct 2 ms 6492 KB Output is correct
11 Correct 2 ms 6492 KB Output is correct
12 Correct 2 ms 6488 KB Output is correct
13 Correct 2 ms 6316 KB Output is correct
14 Correct 2 ms 6492 KB Output is correct
15 Correct 3 ms 6492 KB Output is correct
16 Correct 2 ms 6492 KB Output is correct
17 Correct 2 ms 6492 KB Output is correct
18 Correct 2 ms 6492 KB Output is correct
19 Correct 2 ms 6492 KB Output is correct
20 Correct 2 ms 6492 KB Output is correct
21 Correct 2 ms 6492 KB Output is correct
22 Correct 2 ms 6744 KB Output is correct
23 Correct 2 ms 6492 KB Output is correct
24 Correct 2 ms 6544 KB Output is correct
25 Correct 2 ms 6396 KB Output is correct
26 Correct 2 ms 6492 KB Output is correct
27 Correct 2 ms 6492 KB Output is correct
28 Correct 2 ms 6492 KB Output is correct
29 Correct 61 ms 6492 KB Output is correct
30 Correct 49 ms 6660 KB Output is correct
31 Correct 39 ms 6488 KB Output is correct
32 Correct 23 ms 6680 KB Output is correct
33 Correct 13 ms 6668 KB Output is correct
34 Correct 35 ms 6492 KB Output is correct
35 Correct 55 ms 6488 KB Output is correct
36 Correct 17 ms 6488 KB Output is correct
37 Correct 60 ms 6492 KB Output is correct
38 Correct 51 ms 6492 KB Output is correct
39 Correct 50 ms 6748 KB Output is correct
40 Correct 31 ms 6492 KB Output is correct
41 Correct 29 ms 6492 KB Output is correct
42 Correct 29 ms 6492 KB Output is correct
43 Correct 11 ms 6744 KB Output is correct
44 Correct 8 ms 6492 KB Output is correct
45 Correct 10 ms 6672 KB Output is correct
46 Correct 13 ms 6492 KB Output is correct
47 Correct 29 ms 6684 KB Output is correct
48 Correct 30 ms 6492 KB Output is correct
49 Correct 37 ms 6488 KB Output is correct
50 Correct 42 ms 6492 KB Output is correct
51 Correct 31 ms 6488 KB Output is correct
52 Correct 33 ms 6492 KB Output is correct
53 Correct 41 ms 6492 KB Output is correct
54 Correct 51 ms 6492 KB Output is correct
55 Correct 107 ms 18768 KB Output is correct
56 Correct 233 ms 20564 KB Output is correct
57 Correct 118 ms 20436 KB Output is correct
58 Correct 115 ms 20564 KB Output is correct
59 Correct 99 ms 19228 KB Output is correct
60 Correct 80 ms 20564 KB Output is correct
61 Correct 92 ms 20564 KB Output is correct
62 Correct 171 ms 19700 KB Output is correct
63 Correct 95 ms 18892 KB Output is correct
64 Correct 142 ms 19576 KB Output is correct
65 Correct 73 ms 19280 KB Output is correct
66 Correct 81 ms 21048 KB Output is correct
67 Correct 122 ms 20524 KB Output is correct
68 Correct 175 ms 20092 KB Output is correct
69 Execution timed out 2092 ms 24144 KB Time limit exceeded
70 Halted 0 ms 0 KB -