Submission #642467

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
642467	2022-09-19T13:53:22 Z	dozer	Joker (BOI20_joker)	C++14	14 / 100	2000 ms	17932 KB

Joker

#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, slz;
		int last = m;
		for (auto j : block[i])
		{
			while(!sl.empty())
			{
				root[sl.top().st] = sl.top().nd;
				sl.pop();
				sz[slz.top().st] = slz.top().nd;
				slz.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;
					sz[abs(b)] += sz[a];
					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;
					slz.push({abs(b), sz[abs(b)]});
					sz[abs(b)] += sz[a];
					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:42:6: warning: unused variable 'maks' [-Wunused-variable]
   42 |  int maks = 0;
      |      ^~~~
Joker.cpp:49:6: warning: unused variable 'it' [-Wunused-variable]
   49 |  int it = 0;
      |      ^~

Subtask #1
6.0 / 6.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	5 ms	9684 KB	Output is correct
2	Correct	5 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	4 ms	9684 KB	Output is correct
6	Correct	5 ms	9684 KB	Output is correct
7	Correct	5 ms	9684 KB	Output is correct
8	Correct	5 ms	9684 KB	Output is correct
9	Correct	5 ms	9684 KB	Output is correct
10	Correct	5 ms	9684 KB	Output is correct
11	Correct	5 ms	9704 KB	Output is correct
12	Correct	6 ms	9684 KB	Output is correct
13	Correct	6 ms	9684 KB	Output is correct
14	Correct	5 ms	9760 KB	Output is correct
15	Correct	6 ms	9684 KB	Output is correct
16	Correct	5 ms	9684 KB	Output is correct
17	Correct	5 ms	9684 KB	Output is correct
18	Correct	5 ms	9684 KB	Output is correct
19	Correct	5 ms	9684 KB	Output is correct
20	Correct	5 ms	9684 KB	Output is correct
21	Correct	5 ms	9684 KB	Output is correct
22	Correct	5 ms	9684 KB	Output is correct
23	Correct	5 ms	9684 KB	Output is correct
24	Correct	5 ms	9684 KB	Output is correct
25	Correct	5 ms	9684 KB	Output is correct
26	Correct	5 ms	9684 KB	Output is correct
27	Correct	6 ms	9684 KB	Output is correct
28	Correct	5 ms	9696 KB	Output is correct

Subtask #2
8.0 / 8.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	5 ms	9684 KB	Output is correct
2	Correct	5 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	4 ms	9684 KB	Output is correct
6	Correct	5 ms	9684 KB	Output is correct
7	Correct	5 ms	9684 KB	Output is correct
8	Correct	5 ms	9684 KB	Output is correct
9	Correct	5 ms	9684 KB	Output is correct
10	Correct	5 ms	9684 KB	Output is correct
11	Correct	5 ms	9704 KB	Output is correct
12	Correct	6 ms	9684 KB	Output is correct
13	Correct	6 ms	9684 KB	Output is correct
14	Correct	5 ms	9760 KB	Output is correct
15	Correct	6 ms	9684 KB	Output is correct
16	Correct	5 ms	9684 KB	Output is correct
17	Correct	5 ms	9684 KB	Output is correct
18	Correct	5 ms	9684 KB	Output is correct
19	Correct	5 ms	9684 KB	Output is correct
20	Correct	5 ms	9684 KB	Output is correct
21	Correct	5 ms	9684 KB	Output is correct
22	Correct	5 ms	9684 KB	Output is correct
23	Correct	5 ms	9684 KB	Output is correct
24	Correct	5 ms	9684 KB	Output is correct
25	Correct	5 ms	9684 KB	Output is correct
26	Correct	5 ms	9684 KB	Output is correct
27	Correct	6 ms	9684 KB	Output is correct
28	Correct	5 ms	9696 KB	Output is correct
29	Correct	34 ms	9836 KB	Output is correct
30	Correct	43 ms	9852 KB	Output is correct
31	Correct	43 ms	9852 KB	Output is correct
32	Correct	28 ms	9848 KB	Output is correct
33	Correct	21 ms	9840 KB	Output is correct
34	Correct	33 ms	9852 KB	Output is correct
35	Correct	49 ms	9856 KB	Output is correct
36	Correct	45 ms	9852 KB	Output is correct
37	Correct	58 ms	9812 KB	Output is correct
38	Correct	65 ms	9848 KB	Output is correct
39	Correct	48 ms	9860 KB	Output is correct
40	Correct	37 ms	9856 KB	Output is correct
41	Correct	37 ms	9856 KB	Output is correct
42	Correct	36 ms	9812 KB	Output is correct
43	Correct	12 ms	9812 KB	Output is correct
44	Correct	17 ms	9852 KB	Output is correct
45	Correct	16 ms	9812 KB	Output is correct
46	Correct	29 ms	9852 KB	Output is correct
47	Correct	44 ms	9848 KB	Output is correct
48	Correct	44 ms	9812 KB	Output is correct
49	Correct	43 ms	9856 KB	Output is correct
50	Correct	46 ms	9860 KB	Output is correct
51	Correct	106 ms	9840 KB	Output is correct
52	Correct	80 ms	9848 KB	Output is correct
53	Correct	46 ms	9848 KB	Output is correct
54	Correct	48 ms	9848 KB	Output is correct

Subtask #3
0 / 25.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	5 ms	9684 KB	Output is correct
2	Correct	5 ms	9684 KB	Output is correct
3	Correct	106 ms	16656 KB	Output is correct
4	Correct	151 ms	17300 KB	Output is correct
5	Correct	144 ms	17932 KB	Output is correct
6	Correct	117 ms	17172 KB	Output is correct
7	Correct	118 ms	17228 KB	Output is correct
8	Execution timed out	2029 ms	15532 KB	Time limit exceeded
9	Halted	0 ms	0 KB	-

Subtask #4
0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	5 ms	9684 KB	Output is correct
2	Correct	5 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	4 ms	9684 KB	Output is correct
6	Correct	5 ms	9684 KB	Output is correct
7	Correct	5 ms	9684 KB	Output is correct
8	Correct	5 ms	9684 KB	Output is correct
9	Correct	5 ms	9684 KB	Output is correct
10	Correct	5 ms	9684 KB	Output is correct
11	Correct	5 ms	9704 KB	Output is correct
12	Correct	6 ms	9684 KB	Output is correct
13	Correct	6 ms	9684 KB	Output is correct
14	Correct	5 ms	9760 KB	Output is correct
15	Correct	6 ms	9684 KB	Output is correct
16	Correct	5 ms	9684 KB	Output is correct
17	Correct	5 ms	9684 KB	Output is correct
18	Correct	5 ms	9684 KB	Output is correct
19	Correct	5 ms	9684 KB	Output is correct
20	Correct	5 ms	9684 KB	Output is correct
21	Correct	5 ms	9684 KB	Output is correct
22	Correct	5 ms	9684 KB	Output is correct
23	Correct	5 ms	9684 KB	Output is correct
24	Correct	5 ms	9684 KB	Output is correct
25	Correct	5 ms	9684 KB	Output is correct
26	Correct	5 ms	9684 KB	Output is correct
27	Correct	6 ms	9684 KB	Output is correct
28	Correct	5 ms	9696 KB	Output is correct
29	Correct	106 ms	16656 KB	Output is correct
30	Correct	151 ms	17300 KB	Output is correct
31	Correct	144 ms	17932 KB	Output is correct
32	Correct	117 ms	17172 KB	Output is correct
33	Correct	118 ms	17228 KB	Output is correct
34	Execution timed out	2029 ms	15532 KB	Time limit exceeded
35	Halted	0 ms	0 KB	-

Subtask #5
0 / 22.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	5 ms	9684 KB	Output is correct
2	Correct	5 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	4 ms	9684 KB	Output is correct
6	Correct	5 ms	9684 KB	Output is correct
7	Correct	5 ms	9684 KB	Output is correct
8	Correct	5 ms	9684 KB	Output is correct
9	Correct	5 ms	9684 KB	Output is correct
10	Correct	5 ms	9684 KB	Output is correct
11	Correct	5 ms	9704 KB	Output is correct
12	Correct	6 ms	9684 KB	Output is correct
13	Correct	6 ms	9684 KB	Output is correct
14	Correct	5 ms	9760 KB	Output is correct
15	Correct	6 ms	9684 KB	Output is correct
16	Correct	5 ms	9684 KB	Output is correct
17	Correct	5 ms	9684 KB	Output is correct
18	Correct	5 ms	9684 KB	Output is correct
19	Correct	5 ms	9684 KB	Output is correct
20	Correct	5 ms	9684 KB	Output is correct
21	Correct	5 ms	9684 KB	Output is correct
22	Correct	5 ms	9684 KB	Output is correct
23	Correct	5 ms	9684 KB	Output is correct
24	Correct	5 ms	9684 KB	Output is correct
25	Correct	5 ms	9684 KB	Output is correct
26	Correct	5 ms	9684 KB	Output is correct
27	Correct	6 ms	9684 KB	Output is correct
28	Correct	5 ms	9696 KB	Output is correct
29	Correct	34 ms	9836 KB	Output is correct
30	Correct	43 ms	9852 KB	Output is correct
31	Correct	43 ms	9852 KB	Output is correct
32	Correct	28 ms	9848 KB	Output is correct
33	Correct	21 ms	9840 KB	Output is correct
34	Correct	33 ms	9852 KB	Output is correct
35	Correct	49 ms	9856 KB	Output is correct
36	Correct	45 ms	9852 KB	Output is correct
37	Correct	58 ms	9812 KB	Output is correct
38	Correct	65 ms	9848 KB	Output is correct
39	Correct	48 ms	9860 KB	Output is correct
40	Correct	37 ms	9856 KB	Output is correct
41	Correct	37 ms	9856 KB	Output is correct
42	Correct	36 ms	9812 KB	Output is correct
43	Correct	12 ms	9812 KB	Output is correct
44	Correct	17 ms	9852 KB	Output is correct
45	Correct	16 ms	9812 KB	Output is correct
46	Correct	29 ms	9852 KB	Output is correct
47	Correct	44 ms	9848 KB	Output is correct
48	Correct	44 ms	9812 KB	Output is correct
49	Correct	43 ms	9856 KB	Output is correct
50	Correct	46 ms	9860 KB	Output is correct
51	Correct	106 ms	9840 KB	Output is correct
52	Correct	80 ms	9848 KB	Output is correct
53	Correct	46 ms	9848 KB	Output is correct
54	Correct	48 ms	9848 KB	Output is correct
55	Execution timed out	2080 ms	13888 KB	Time limit exceeded
56	Halted	0 ms	0 KB	-

Subtask #6
0 / 29.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	5 ms	9684 KB	Output is correct
2	Correct	5 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	4 ms	9684 KB	Output is correct
6	Correct	5 ms	9684 KB	Output is correct
7	Correct	5 ms	9684 KB	Output is correct
8	Correct	5 ms	9684 KB	Output is correct
9	Correct	5 ms	9684 KB	Output is correct
10	Correct	5 ms	9684 KB	Output is correct
11	Correct	5 ms	9704 KB	Output is correct
12	Correct	6 ms	9684 KB	Output is correct
13	Correct	6 ms	9684 KB	Output is correct
14	Correct	5 ms	9760 KB	Output is correct
15	Correct	6 ms	9684 KB	Output is correct
16	Correct	5 ms	9684 KB	Output is correct
17	Correct	5 ms	9684 KB	Output is correct
18	Correct	5 ms	9684 KB	Output is correct
19	Correct	5 ms	9684 KB	Output is correct
20	Correct	5 ms	9684 KB	Output is correct
21	Correct	5 ms	9684 KB	Output is correct
22	Correct	5 ms	9684 KB	Output is correct
23	Correct	5 ms	9684 KB	Output is correct
24	Correct	5 ms	9684 KB	Output is correct
25	Correct	5 ms	9684 KB	Output is correct
26	Correct	5 ms	9684 KB	Output is correct
27	Correct	6 ms	9684 KB	Output is correct
28	Correct	5 ms	9696 KB	Output is correct
29	Correct	34 ms	9836 KB	Output is correct
30	Correct	43 ms	9852 KB	Output is correct
31	Correct	43 ms	9852 KB	Output is correct
32	Correct	28 ms	9848 KB	Output is correct
33	Correct	21 ms	9840 KB	Output is correct
34	Correct	33 ms	9852 KB	Output is correct
35	Correct	49 ms	9856 KB	Output is correct
36	Correct	45 ms	9852 KB	Output is correct
37	Correct	58 ms	9812 KB	Output is correct
38	Correct	65 ms	9848 KB	Output is correct
39	Correct	48 ms	9860 KB	Output is correct
40	Correct	37 ms	9856 KB	Output is correct
41	Correct	37 ms	9856 KB	Output is correct
42	Correct	36 ms	9812 KB	Output is correct
43	Correct	12 ms	9812 KB	Output is correct
44	Correct	17 ms	9852 KB	Output is correct
45	Correct	16 ms	9812 KB	Output is correct
46	Correct	29 ms	9852 KB	Output is correct
47	Correct	44 ms	9848 KB	Output is correct
48	Correct	44 ms	9812 KB	Output is correct
49	Correct	43 ms	9856 KB	Output is correct
50	Correct	46 ms	9860 KB	Output is correct
51	Correct	106 ms	9840 KB	Output is correct
52	Correct	80 ms	9848 KB	Output is correct
53	Correct	46 ms	9848 KB	Output is correct
54	Correct	48 ms	9848 KB	Output is correct
55	Correct	106 ms	16656 KB	Output is correct
56	Correct	151 ms	17300 KB	Output is correct
57	Correct	144 ms	17932 KB	Output is correct
58	Correct	117 ms	17172 KB	Output is correct
59	Correct	118 ms	17228 KB	Output is correct
60	Execution timed out	2029 ms	15532 KB	Time limit exceeded
61	Halted	0 ms	0 KB	-

Submission #642467

Compilation message

Subtask #1 6.0 / 6.0

Subtask #2 8.0 / 8.0

Subtask #3 0 / 25.0

Subtask #4 0 / 10.0

Subtask #5 0 / 22.0

Subtask #6 0 / 29.0

Subtask #1
6.0 / 6.0

Subtask #2
8.0 / 8.0

Subtask #3
0 / 25.0

Subtask #4
0 / 10.0

Subtask #5
0 / 22.0

Subtask #6
0 / 29.0