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Submission #642298

# Submission time Handle Problem Language Result Execution time Memory
642298 2022-09-19T08:08:46 Z dozer Joker (BOI20_joker) C++14
14 / 100
 157 ms 262144 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 200005

const int modulo = 1e9 + 7;
int ans[N], u[N], v[N], l[N], r[N], n;
vector<int> ind[N], root, gh[N];
map<int, int> res[N];

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


int32_t main()
{
	fastio();


	int m, q;
	cin>>n>>m>>q;
	root.resize(n + 5, 0);
	for (int i = 1; i <= n; i++)
		root[i] = i;

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

	for (int i = 1; i <= q; i++)
	{
		cin>>l[i]>>r[i];
		ind[r[i]].pb(l[i]);
	}

	for (int i = m; i >= 1; i--)
	{
		sort(ind[i].begin(), ind[i].end());
		if (ind[i].size() > 0)
		{
			vector<int> tmp(root.begin(), root.end());
			gh[i] = tmp;

		}
		if (ans[i] == 1) 
		{
			ans[i - 1] = 1;
			continue;
		}
		int a = find(root, u[i]), b = find(root, v[i]);
		if (a == b) ans[i - 1] = 1;
		else
		{
			if (a < 0) a *= -1, b *= -1;
			root[a] = -b;
		}
		//cout<<i<<sp<<ans[i]<<endl;
	}

	for (int i = m; i >= 1; i--)
	{
		if (gh[i].empty()) continue;
		int last = 1;
		for (auto j : ind[i])
		{
			if (ans[i] == 1 || res[i][last] == 1) 
			{
				res[i][j] = 1;
				continue;
			}
			for (int k = last; k < j; k++)
			{
				int a = find(gh[i], u[k]), b = find(gh[i], v[k]);
				if (a == b)
				{
					res[i][j] = 1;
					break;
				} 
				if (a < 0) a *= -1, b *= -1;
				gh[i][a] = -b;
			}
			last = j;
		}
	}

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

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 19028 KB Output is correct
2 Correct 11 ms 19156 KB Output is correct
3 Correct 11 ms 19028 KB Output is correct
4 Correct 9 ms 19028 KB Output is correct
5 Correct 9 ms 19028 KB Output is correct
6 Correct 9 ms 19028 KB Output is correct
7 Correct 11 ms 19096 KB Output is correct
8 Correct 10 ms 19156 KB Output is correct
9 Correct 12 ms 19156 KB Output is correct
10 Correct 10 ms 19156 KB Output is correct
11 Correct 11 ms 19188 KB Output is correct
12 Correct 10 ms 19184 KB Output is correct
13 Correct 9 ms 19096 KB Output is correct
14 Correct 10 ms 19156 KB Output is correct
15 Correct 10 ms 19236 KB Output is correct
16 Correct 10 ms 19156 KB Output is correct
17 Correct 10 ms 19156 KB Output is correct
18 Correct 9 ms 19156 KB Output is correct
19 Correct 9 ms 19116 KB Output is correct
20 Correct 11 ms 19156 KB Output is correct
21 Correct 9 ms 19156 KB Output is correct
22 Correct 9 ms 19156 KB Output is correct
23 Correct 10 ms 19084 KB Output is correct
24 Correct 10 ms 19156 KB Output is correct
25 Correct 11 ms 19156 KB Output is correct
26 Correct 10 ms 19104 KB Output is correct
27 Correct 10 ms 19156 KB Output is correct
28 Correct 12 ms 19112 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 19028 KB Output is correct
2 Correct 11 ms 19156 KB Output is correct
3 Correct 11 ms 19028 KB Output is correct
4 Correct 9 ms 19028 KB Output is correct
5 Correct 9 ms 19028 KB Output is correct
6 Correct 9 ms 19028 KB Output is correct
7 Correct 11 ms 19096 KB Output is correct
8 Correct 10 ms 19156 KB Output is correct
9 Correct 12 ms 19156 KB Output is correct
10 Correct 10 ms 19156 KB Output is correct
11 Correct 11 ms 19188 KB Output is correct
12 Correct 10 ms 19184 KB Output is correct
13 Correct 9 ms 19096 KB Output is correct
14 Correct 10 ms 19156 KB Output is correct
15 Correct 10 ms 19236 KB Output is correct
16 Correct 10 ms 19156 KB Output is correct
17 Correct 10 ms 19156 KB Output is correct
18 Correct 9 ms 19156 KB Output is correct
19 Correct 9 ms 19116 KB Output is correct
20 Correct 11 ms 19156 KB Output is correct
21 Correct 9 ms 19156 KB Output is correct
22 Correct 9 ms 19156 KB Output is correct
23 Correct 10 ms 19084 KB Output is correct
24 Correct 10 ms 19156 KB Output is correct
25 Correct 11 ms 19156 KB Output is correct
26 Correct 10 ms 19104 KB Output is correct
27 Correct 10 ms 19156 KB Output is correct
28 Correct 12 ms 19112 KB Output is correct
29 Correct 20 ms 25856 KB Output is correct
30 Correct 17 ms 23444 KB Output is correct
31 Correct 16 ms 22712 KB Output is correct
32 Correct 15 ms 21332 KB Output is correct
33 Correct 13 ms 20308 KB Output is correct
34 Correct 16 ms 23124 KB Output is correct
35 Correct 19 ms 23764 KB Output is correct
36 Correct 14 ms 21332 KB Output is correct
37 Correct 31 ms 25724 KB Output is correct
38 Correct 60 ms 29260 KB Output is correct
39 Correct 18 ms 22704 KB Output is correct
40 Correct 14 ms 21168 KB Output is correct
41 Correct 12 ms 21204 KB Output is correct
42 Correct 12 ms 21076 KB Output is correct
43 Correct 13 ms 22228 KB Output is correct
44 Correct 16 ms 24192 KB Output is correct
45 Correct 17 ms 27092 KB Output is correct
46 Correct 25 ms 29012 KB Output is correct
47 Correct 15 ms 20880 KB Output is correct
48 Correct 17 ms 21460 KB Output is correct
49 Correct 16 ms 22180 KB Output is correct
50 Correct 18 ms 23516 KB Output is correct
51 Correct 13 ms 20600 KB Output is correct
52 Correct 14 ms 21332 KB Output is correct
53 Correct 19 ms 22228 KB Output is correct
54 Correct 19 ms 23648 KB Output is correct

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 19028 KB Output is correct
2 Correct 11 ms 19156 KB Output is correct
3 Runtime error 157 ms 262144 KB Execution killed with signal 9
4 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 19028 KB Output is correct
2 Correct 11 ms 19156 KB Output is correct
3 Correct 11 ms 19028 KB Output is correct
4 Correct 9 ms 19028 KB Output is correct
5 Correct 9 ms 19028 KB Output is correct
6 Correct 9 ms 19028 KB Output is correct
7 Correct 11 ms 19096 KB Output is correct
8 Correct 10 ms 19156 KB Output is correct
9 Correct 12 ms 19156 KB Output is correct
10 Correct 10 ms 19156 KB Output is correct
11 Correct 11 ms 19188 KB Output is correct
12 Correct 10 ms 19184 KB Output is correct
13 Correct 9 ms 19096 KB Output is correct
14 Correct 10 ms 19156 KB Output is correct
15 Correct 10 ms 19236 KB Output is correct
16 Correct 10 ms 19156 KB Output is correct
17 Correct 10 ms 19156 KB Output is correct
18 Correct 9 ms 19156 KB Output is correct
19 Correct 9 ms 19116 KB Output is correct
20 Correct 11 ms 19156 KB Output is correct
21 Correct 9 ms 19156 KB Output is correct
22 Correct 9 ms 19156 KB Output is correct
23 Correct 10 ms 19084 KB Output is correct
24 Correct 10 ms 19156 KB Output is correct
25 Correct 11 ms 19156 KB Output is correct
26 Correct 10 ms 19104 KB Output is correct
27 Correct 10 ms 19156 KB Output is correct
28 Correct 12 ms 19112 KB Output is correct
29 Runtime error 157 ms 262144 KB Execution killed with signal 9
30 Halted 0 ms 0 KB -

Subtask #5
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 19028 KB Output is correct
2 Correct 11 ms 19156 KB Output is correct
3 Correct 11 ms 19028 KB Output is correct
4 Correct 9 ms 19028 KB Output is correct
5 Correct 9 ms 19028 KB Output is correct
6 Correct 9 ms 19028 KB Output is correct
7 Correct 11 ms 19096 KB Output is correct
8 Correct 10 ms 19156 KB Output is correct
9 Correct 12 ms 19156 KB Output is correct
10 Correct 10 ms 19156 KB Output is correct
11 Correct 11 ms 19188 KB Output is correct
12 Correct 10 ms 19184 KB Output is correct
13 Correct 9 ms 19096 KB Output is correct
14 Correct 10 ms 19156 KB Output is correct
15 Correct 10 ms 19236 KB Output is correct
16 Correct 10 ms 19156 KB Output is correct
17 Correct 10 ms 19156 KB Output is correct
18 Correct 9 ms 19156 KB Output is correct
19 Correct 9 ms 19116 KB Output is correct
20 Correct 11 ms 19156 KB Output is correct
21 Correct 9 ms 19156 KB Output is correct
22 Correct 9 ms 19156 KB Output is correct
23 Correct 10 ms 19084 KB Output is correct
24 Correct 10 ms 19156 KB Output is correct
25 Correct 11 ms 19156 KB Output is correct
26 Correct 10 ms 19104 KB Output is correct
27 Correct 10 ms 19156 KB Output is correct
28 Correct 12 ms 19112 KB Output is correct
29 Correct 20 ms 25856 KB Output is correct
30 Correct 17 ms 23444 KB Output is correct
31 Correct 16 ms 22712 KB Output is correct
32 Correct 15 ms 21332 KB Output is correct
33 Correct 13 ms 20308 KB Output is correct
34 Correct 16 ms 23124 KB Output is correct
35 Correct 19 ms 23764 KB Output is correct
36 Correct 14 ms 21332 KB Output is correct
37 Correct 31 ms 25724 KB Output is correct
38 Correct 60 ms 29260 KB Output is correct
39 Correct 18 ms 22704 KB Output is correct
40 Correct 14 ms 21168 KB Output is correct
41 Correct 12 ms 21204 KB Output is correct
42 Correct 12 ms 21076 KB Output is correct
43 Correct 13 ms 22228 KB Output is correct
44 Correct 16 ms 24192 KB Output is correct
45 Correct 17 ms 27092 KB Output is correct
46 Correct 25 ms 29012 KB Output is correct
47 Correct 15 ms 20880 KB Output is correct
48 Correct 17 ms 21460 KB Output is correct
49 Correct 16 ms 22180 KB Output is correct
50 Correct 18 ms 23516 KB Output is correct
51 Correct 13 ms 20600 KB Output is correct
52 Correct 14 ms 21332 KB Output is correct
53 Correct 19 ms 22228 KB Output is correct
54 Correct 19 ms 23648 KB Output is correct
55 Runtime error 139 ms 262144 KB Execution killed with signal 9
56 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 19028 KB Output is correct
2 Correct 11 ms 19156 KB Output is correct
3 Correct 11 ms 19028 KB Output is correct
4 Correct 9 ms 19028 KB Output is correct
5 Correct 9 ms 19028 KB Output is correct
6 Correct 9 ms 19028 KB Output is correct
7 Correct 11 ms 19096 KB Output is correct
8 Correct 10 ms 19156 KB Output is correct
9 Correct 12 ms 19156 KB Output is correct
10 Correct 10 ms 19156 KB Output is correct
11 Correct 11 ms 19188 KB Output is correct
12 Correct 10 ms 19184 KB Output is correct
13 Correct 9 ms 19096 KB Output is correct
14 Correct 10 ms 19156 KB Output is correct
15 Correct 10 ms 19236 KB Output is correct
16 Correct 10 ms 19156 KB Output is correct
17 Correct 10 ms 19156 KB Output is correct
18 Correct 9 ms 19156 KB Output is correct
19 Correct 9 ms 19116 KB Output is correct
20 Correct 11 ms 19156 KB Output is correct
21 Correct 9 ms 19156 KB Output is correct
22 Correct 9 ms 19156 KB Output is correct
23 Correct 10 ms 19084 KB Output is correct
24 Correct 10 ms 19156 KB Output is correct
25 Correct 11 ms 19156 KB Output is correct
26 Correct 10 ms 19104 KB Output is correct
27 Correct 10 ms 19156 KB Output is correct
28 Correct 12 ms 19112 KB Output is correct
29 Correct 20 ms 25856 KB Output is correct
30 Correct 17 ms 23444 KB Output is correct
31 Correct 16 ms 22712 KB Output is correct
32 Correct 15 ms 21332 KB Output is correct
33 Correct 13 ms 20308 KB Output is correct
34 Correct 16 ms 23124 KB Output is correct
35 Correct 19 ms 23764 KB Output is correct
36 Correct 14 ms 21332 KB Output is correct
37 Correct 31 ms 25724 KB Output is correct
38 Correct 60 ms 29260 KB Output is correct
39 Correct 18 ms 22704 KB Output is correct
40 Correct 14 ms 21168 KB Output is correct
41 Correct 12 ms 21204 KB Output is correct
42 Correct 12 ms 21076 KB Output is correct
43 Correct 13 ms 22228 KB Output is correct
44 Correct 16 ms 24192 KB Output is correct
45 Correct 17 ms 27092 KB Output is correct
46 Correct 25 ms 29012 KB Output is correct
47 Correct 15 ms 20880 KB Output is correct
48 Correct 17 ms 21460 KB Output is correct
49 Correct 16 ms 22180 KB Output is correct
50 Correct 18 ms 23516 KB Output is correct
51 Correct 13 ms 20600 KB Output is correct
52 Correct 14 ms 21332 KB Output is correct
53 Correct 19 ms 22228 KB Output is correct
54 Correct 19 ms 23648 KB Output is correct
55 Runtime error 157 ms 262144 KB Execution killed with signal 9
56 Halted 0 ms 0 KB -