oj.uz

Submission #642463

# Submission time Handle Problem Language Result Execution time Memory
642463 2022-09-19T13:47:53 Z dozer Joker (BOI20_joker) C++14
14 / 100
 2000 ms 16252 KB 
#include <bits/stdc++.h>
using namespace std;
#define fileio() freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout)
#define fastio() cin.tie(0), ios_base::sync_with_stdio(0)
#define sp " "
#define endl "\n"
#define pb push_back
#define pii pair<int, int>
#define st first
#define nd second
#define N 400005

const int modulo = 1e9 + 7;
int ans[N], u[N], v[N], l[N], r[N], n, sz[N];
vector<int> root;
vector<pii> block[N];
int res[N], s;

int find(vector<int> &b, int node)
{
	if (node < 0) return -(find(b, -node));
	if (node == b[node]) return node;
	return find(b, b[node]);
}


int32_t main()
{
	
	fastio();


	int m, q;
	cin>>n>>m>>q;
	root.resize(n + 5, 0);

	while(s * s < m) s++;
	for (int i = 1; i <= m; i++)
	{
		cin>>u[i]>>v[i];
	}

	int maks = 0;
	for (int i = 1; i <= q; i++)
	{
		cin>>l[i]>>r[i];
		block[l[i] / s].pb({r[i], i});
	}

	int it = 0;
	for (int i = 0; i <= m / s + 1; i++)
	{
		for (int j = 1; j <= n; j++) root[j] = j, sz[j] = 1;
		sort(block[i].rbegin(), block[i].rend());
		stack<pii> sl;
		int last = m;
		for (auto j : block[i])
		{
			while(!sl.empty())
			{
				root[sl.top().st] = sl.top().nd;
				sl.pop();
			}
			//cout<<j.nd<<sp<<l[j.nd]<<sp<<r[j.nd]<<endl;
			while(last > r[j.nd])
			{
				int a = find(root, u[last]), b = find(root, v[last]);
				if (a == b) 
				{
					res[j.nd] = 1;
					break;
				}
				else
				{
					if (sz[abs(a)] > sz[abs(b)]) swap(a, b);
					if (a < 0) a *= -1, b *= -1;
					root[a] = -b;
				}
				last--;
			}
			for (int k = 1; k < l[j.nd]; k++)
			{
				int a = find(root, u[k]), b = find(root, v[k]);
				if (a == b) 
				{
					res[j.nd] = 1;
					break;
				}
				else
				{
					if (sz[abs(a)] > sz[abs(b)]) swap(a, b);
					if (a < 0) a *= -1, b *= -1;
					sl.push({a, root[a]});
					root[a] = -b;
				}
			}
		}
	}
	

	for (int i = 1; i <= q; i++)
	{
		if (res[i]) cout<<"YES\n";
		else cout<<"NO\n";
	}
		
	cerr<<"time taken : "<<(float)clock() / CLOCKS_PER_SEC<<" seconds\n";
}

Compilation message

Joker.cpp: In function 'int32_t main()':
Joker.cpp:43:6: warning: unused variable 'maks' [-Wunused-variable]
   43 |  int maks = 0;
      |      ^~~~
Joker.cpp:50:6: warning: unused variable 'it' [-Wunused-variable]
   50 |  int it = 0;
      |      ^~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9684 KB Output is correct
2 Correct 6 ms 9684 KB Output is correct
3 Correct 5 ms 9684 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 6 ms 9728 KB Output is correct
7 Correct 5 ms 9684 KB Output is correct
8 Correct 5 ms 9684 KB Output is correct
9 Correct 6 ms 9684 KB Output is correct
10 Correct 6 ms 9684 KB Output is correct
11 Correct 6 ms 9684 KB Output is correct
12 Correct 6 ms 9684 KB Output is correct
13 Correct 5 ms 9684 KB Output is correct
14 Correct 6 ms 9684 KB Output is correct
15 Correct 6 ms 9684 KB Output is correct
16 Correct 7 ms 9724 KB Output is correct
17 Correct 5 ms 9684 KB Output is correct
18 Correct 6 ms 9684 KB Output is correct
19 Correct 6 ms 9728 KB Output is correct
20 Correct 5 ms 9732 KB Output is correct
21 Correct 6 ms 9684 KB Output is correct
22 Correct 5 ms 9732 KB Output is correct
23 Correct 5 ms 9684 KB Output is correct
24 Correct 5 ms 9732 KB Output is correct
25 Correct 5 ms 9728 KB Output is correct
26 Correct 6 ms 9728 KB Output is correct
27 Correct 6 ms 9684 KB Output is correct
28 Correct 6 ms 9724 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9684 KB Output is correct
2 Correct 6 ms 9684 KB Output is correct
3 Correct 5 ms 9684 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 6 ms 9728 KB Output is correct
7 Correct 5 ms 9684 KB Output is correct
8 Correct 5 ms 9684 KB Output is correct
9 Correct 6 ms 9684 KB Output is correct
10 Correct 6 ms 9684 KB Output is correct
11 Correct 6 ms 9684 KB Output is correct
12 Correct 6 ms 9684 KB Output is correct
13 Correct 5 ms 9684 KB Output is correct
14 Correct 6 ms 9684 KB Output is correct
15 Correct 6 ms 9684 KB Output is correct
16 Correct 7 ms 9724 KB Output is correct
17 Correct 5 ms 9684 KB Output is correct
18 Correct 6 ms 9684 KB Output is correct
19 Correct 6 ms 9728 KB Output is correct
20 Correct 5 ms 9732 KB Output is correct
21 Correct 6 ms 9684 KB Output is correct
22 Correct 5 ms 9732 KB Output is correct
23 Correct 5 ms 9684 KB Output is correct
24 Correct 5 ms 9732 KB Output is correct
25 Correct 5 ms 9728 KB Output is correct
26 Correct 6 ms 9728 KB Output is correct
27 Correct 6 ms 9684 KB Output is correct
28 Correct 6 ms 9724 KB Output is correct
29 Correct 21 ms 9848 KB Output is correct
30 Correct 25 ms 9880 KB Output is correct
31 Correct 26 ms 9864 KB Output is correct
32 Correct 18 ms 9864 KB Output is correct
33 Correct 14 ms 9792 KB Output is correct
34 Correct 20 ms 9880 KB Output is correct
35 Correct 37 ms 9888 KB Output is correct
36 Correct 28 ms 9884 KB Output is correct
37 Correct 36 ms 9888 KB Output is correct
38 Correct 55 ms 9872 KB Output is correct
39 Correct 60 ms 9872 KB Output is correct
40 Correct 37 ms 9876 KB Output is correct
41 Correct 29 ms 9872 KB Output is correct
42 Correct 31 ms 9880 KB Output is correct
43 Correct 17 ms 9800 KB Output is correct
44 Correct 16 ms 9860 KB Output is correct
45 Correct 12 ms 9800 KB Output is correct
46 Correct 25 ms 9884 KB Output is correct
47 Correct 31 ms 9868 KB Output is correct
48 Correct 30 ms 9872 KB Output is correct
49 Correct 30 ms 9812 KB Output is correct
50 Correct 32 ms 9812 KB Output is correct
51 Correct 136 ms 9864 KB Output is correct
52 Correct 100 ms 9864 KB Output is correct
53 Correct 47 ms 9864 KB Output is correct
54 Correct 32 ms 9872 KB Output is correct

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9684 KB Output is correct
2 Correct 6 ms 9684 KB Output is correct
3 Execution timed out 2096 ms 16252 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9684 KB Output is correct
2 Correct 6 ms 9684 KB Output is correct
3 Correct 5 ms 9684 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 6 ms 9728 KB Output is correct
7 Correct 5 ms 9684 KB Output is correct
8 Correct 5 ms 9684 KB Output is correct
9 Correct 6 ms 9684 KB Output is correct
10 Correct 6 ms 9684 KB Output is correct
11 Correct 6 ms 9684 KB Output is correct
12 Correct 6 ms 9684 KB Output is correct
13 Correct 5 ms 9684 KB Output is correct
14 Correct 6 ms 9684 KB Output is correct
15 Correct 6 ms 9684 KB Output is correct
16 Correct 7 ms 9724 KB Output is correct
17 Correct 5 ms 9684 KB Output is correct
18 Correct 6 ms 9684 KB Output is correct
19 Correct 6 ms 9728 KB Output is correct
20 Correct 5 ms 9732 KB Output is correct
21 Correct 6 ms 9684 KB Output is correct
22 Correct 5 ms 9732 KB Output is correct
23 Correct 5 ms 9684 KB Output is correct
24 Correct 5 ms 9732 KB Output is correct
25 Correct 5 ms 9728 KB Output is correct
26 Correct 6 ms 9728 KB Output is correct
27 Correct 6 ms 9684 KB Output is correct
28 Correct 6 ms 9724 KB Output is correct
29 Execution timed out 2096 ms 16252 KB Time limit exceeded
30 Halted 0 ms 0 KB -

Subtask #5
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9684 KB Output is correct
2 Correct 6 ms 9684 KB Output is correct
3 Correct 5 ms 9684 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 6 ms 9728 KB Output is correct
7 Correct 5 ms 9684 KB Output is correct
8 Correct 5 ms 9684 KB Output is correct
9 Correct 6 ms 9684 KB Output is correct
10 Correct 6 ms 9684 KB Output is correct
11 Correct 6 ms 9684 KB Output is correct
12 Correct 6 ms 9684 KB Output is correct
13 Correct 5 ms 9684 KB Output is correct
14 Correct 6 ms 9684 KB Output is correct
15 Correct 6 ms 9684 KB Output is correct
16 Correct 7 ms 9724 KB Output is correct
17 Correct 5 ms 9684 KB Output is correct
18 Correct 6 ms 9684 KB Output is correct
19 Correct 6 ms 9728 KB Output is correct
20 Correct 5 ms 9732 KB Output is correct
21 Correct 6 ms 9684 KB Output is correct
22 Correct 5 ms 9732 KB Output is correct
23 Correct 5 ms 9684 KB Output is correct
24 Correct 5 ms 9732 KB Output is correct
25 Correct 5 ms 9728 KB Output is correct
26 Correct 6 ms 9728 KB Output is correct
27 Correct 6 ms 9684 KB Output is correct
28 Correct 6 ms 9724 KB Output is correct
29 Correct 21 ms 9848 KB Output is correct
30 Correct 25 ms 9880 KB Output is correct
31 Correct 26 ms 9864 KB Output is correct
32 Correct 18 ms 9864 KB Output is correct
33 Correct 14 ms 9792 KB Output is correct
34 Correct 20 ms 9880 KB Output is correct
35 Correct 37 ms 9888 KB Output is correct
36 Correct 28 ms 9884 KB Output is correct
37 Correct 36 ms 9888 KB Output is correct
38 Correct 55 ms 9872 KB Output is correct
39 Correct 60 ms 9872 KB Output is correct
40 Correct 37 ms 9876 KB Output is correct
41 Correct 29 ms 9872 KB Output is correct
42 Correct 31 ms 9880 KB Output is correct
43 Correct 17 ms 9800 KB Output is correct
44 Correct 16 ms 9860 KB Output is correct
45 Correct 12 ms 9800 KB Output is correct
46 Correct 25 ms 9884 KB Output is correct
47 Correct 31 ms 9868 KB Output is correct
48 Correct 30 ms 9872 KB Output is correct
49 Correct 30 ms 9812 KB Output is correct
50 Correct 32 ms 9812 KB Output is correct
51 Correct 136 ms 9864 KB Output is correct
52 Correct 100 ms 9864 KB Output is correct
53 Correct 47 ms 9864 KB Output is correct
54 Correct 32 ms 9872 KB Output is correct
55 Execution timed out 2079 ms 13316 KB Time limit exceeded
56 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9684 KB Output is correct
2 Correct 6 ms 9684 KB Output is correct
3 Correct 5 ms 9684 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 6 ms 9728 KB Output is correct
7 Correct 5 ms 9684 KB Output is correct
8 Correct 5 ms 9684 KB Output is correct
9 Correct 6 ms 9684 KB Output is correct
10 Correct 6 ms 9684 KB Output is correct
11 Correct 6 ms 9684 KB Output is correct
12 Correct 6 ms 9684 KB Output is correct
13 Correct 5 ms 9684 KB Output is correct
14 Correct 6 ms 9684 KB Output is correct
15 Correct 6 ms 9684 KB Output is correct
16 Correct 7 ms 9724 KB Output is correct
17 Correct 5 ms 9684 KB Output is correct
18 Correct 6 ms 9684 KB Output is correct
19 Correct 6 ms 9728 KB Output is correct
20 Correct 5 ms 9732 KB Output is correct
21 Correct 6 ms 9684 KB Output is correct
22 Correct 5 ms 9732 KB Output is correct
23 Correct 5 ms 9684 KB Output is correct
24 Correct 5 ms 9732 KB Output is correct
25 Correct 5 ms 9728 KB Output is correct
26 Correct 6 ms 9728 KB Output is correct
27 Correct 6 ms 9684 KB Output is correct
28 Correct 6 ms 9724 KB Output is correct
29 Correct 21 ms 9848 KB Output is correct
30 Correct 25 ms 9880 KB Output is correct
31 Correct 26 ms 9864 KB Output is correct
32 Correct 18 ms 9864 KB Output is correct
33 Correct 14 ms 9792 KB Output is correct
34 Correct 20 ms 9880 KB Output is correct
35 Correct 37 ms 9888 KB Output is correct
36 Correct 28 ms 9884 KB Output is correct
37 Correct 36 ms 9888 KB Output is correct
38 Correct 55 ms 9872 KB Output is correct
39 Correct 60 ms 9872 KB Output is correct
40 Correct 37 ms 9876 KB Output is correct
41 Correct 29 ms 9872 KB Output is correct
42 Correct 31 ms 9880 KB Output is correct
43 Correct 17 ms 9800 KB Output is correct
44 Correct 16 ms 9860 KB Output is correct
45 Correct 12 ms 9800 KB Output is correct
46 Correct 25 ms 9884 KB Output is correct
47 Correct 31 ms 9868 KB Output is correct
48 Correct 30 ms 9872 KB Output is correct
49 Correct 30 ms 9812 KB Output is correct
50 Correct 32 ms 9812 KB Output is correct
51 Correct 136 ms 9864 KB Output is correct
52 Correct 100 ms 9864 KB Output is correct
53 Correct 47 ms 9864 KB Output is correct
54 Correct 32 ms 9872 KB Output is correct
55 Execution timed out 2096 ms 16252 KB Time limit exceeded
56 Halted 0 ms 0 KB -