oj.uz

Submission #642541

# Submission time Handle Problem Language Result Execution time Memory
642541 2022-09-19T20:19:02 Z dozer Joker (BOI20_joker) C++14
49 / 100
 2000 ms 18040 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, int flag)
{
	if (node < 0) return -(find(b, -node, flag));
	if (node == b[node]) return node;
	if (flag) return b[node] = find(b, b[node], flag);
	return find(b, b[node], flag);
}


int32_t main()
{
	fastio();


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

	while(s * s < q) 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], 1), b = find(root, v[last], 1);
				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], 0), b = find(root, v[k], 0);
				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:44:6: warning: unused variable 'maks' [-Wunused-variable]
   44 |  int maks = 0;
      |      ^~~~
Joker.cpp:51:6: warning: unused variable 'it' [-Wunused-variable]
   51 |  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 9724 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 5 ms 9724 KB Output is correct
7 Correct 5 ms 9728 KB Output is correct
8 Correct 6 ms 9728 KB Output is correct
9 Correct 6 ms 9648 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 6 ms 9684 KB Output is correct
14 Correct 6 ms 9684 KB Output is correct
15 Correct 6 ms 9732 KB Output is correct
16 Correct 5 ms 9684 KB Output is correct
17 Correct 6 ms 9728 KB Output is correct
18 Correct 5 ms 9684 KB Output is correct
19 Correct 6 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 6 ms 9728 KB Output is correct
23 Correct 6 ms 9728 KB Output is correct
24 Correct 5 ms 9684 KB Output is correct
25 Correct 6 ms 9724 KB Output is correct
26 Correct 6 ms 9684 KB Output is correct
27 Correct 6 ms 9684 KB Output is correct
28 Correct 6 ms 9684 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 9724 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 5 ms 9724 KB Output is correct
7 Correct 5 ms 9728 KB Output is correct
8 Correct 6 ms 9728 KB Output is correct
9 Correct 6 ms 9648 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 6 ms 9684 KB Output is correct
14 Correct 6 ms 9684 KB Output is correct
15 Correct 6 ms 9732 KB Output is correct
16 Correct 5 ms 9684 KB Output is correct
17 Correct 6 ms 9728 KB Output is correct
18 Correct 5 ms 9684 KB Output is correct
19 Correct 6 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 6 ms 9728 KB Output is correct
23 Correct 6 ms 9728 KB Output is correct
24 Correct 5 ms 9684 KB Output is correct
25 Correct 6 ms 9724 KB Output is correct
26 Correct 6 ms 9684 KB Output is correct
27 Correct 6 ms 9684 KB Output is correct
28 Correct 6 ms 9684 KB Output is correct
29 Correct 37 ms 9864 KB Output is correct
30 Correct 42 ms 9884 KB Output is correct
31 Correct 42 ms 9888 KB Output is correct
32 Correct 31 ms 9812 KB Output is correct
33 Correct 21 ms 9884 KB Output is correct
34 Correct 35 ms 9880 KB Output is correct
35 Correct 51 ms 9812 KB Output is correct
36 Correct 47 ms 9812 KB Output is correct
37 Correct 61 ms 9888 KB Output is correct
38 Correct 66 ms 9880 KB Output is correct
39 Correct 51 ms 9888 KB Output is correct
40 Correct 40 ms 9872 KB Output is correct
41 Correct 38 ms 9884 KB Output is correct
42 Correct 38 ms 9812 KB Output is correct
43 Correct 10 ms 9888 KB Output is correct
44 Correct 14 ms 9888 KB Output is correct
45 Correct 16 ms 9812 KB Output is correct
46 Correct 31 ms 9896 KB Output is correct
47 Correct 47 ms 9884 KB Output is correct
48 Correct 45 ms 9812 KB Output is correct
49 Correct 46 ms 9884 KB Output is correct
50 Correct 48 ms 9896 KB Output is correct
51 Correct 104 ms 9872 KB Output is correct
52 Correct 79 ms 9812 KB Output is correct
53 Correct 49 ms 9876 KB Output is correct
54 Correct 51 ms 9892 KB Output is correct

Subtask #3
25.0 / 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 108 ms 16988 KB Output is correct
4 Correct 171 ms 16928 KB Output is correct
5 Correct 138 ms 17636 KB Output is correct
6 Correct 115 ms 17060 KB Output is correct
7 Correct 126 ms 17100 KB Output is correct
8 Correct 104 ms 16976 KB Output is correct
9 Correct 116 ms 17204 KB Output is correct
10 Correct 148 ms 18040 KB Output is correct
11 Correct 118 ms 17256 KB Output is correct
12 Correct 141 ms 17732 KB Output is correct
13 Correct 93 ms 16472 KB Output is correct
14 Correct 107 ms 16792 KB Output is correct
15 Correct 131 ms 17436 KB Output is correct
16 Correct 148 ms 17860 KB Output is correct

Subtask #4
10.0 / 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 9724 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 5 ms 9724 KB Output is correct
7 Correct 5 ms 9728 KB Output is correct
8 Correct 6 ms 9728 KB Output is correct
9 Correct 6 ms 9648 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 6 ms 9684 KB Output is correct
14 Correct 6 ms 9684 KB Output is correct
15 Correct 6 ms 9732 KB Output is correct
16 Correct 5 ms 9684 KB Output is correct
17 Correct 6 ms 9728 KB Output is correct
18 Correct 5 ms 9684 KB Output is correct
19 Correct 6 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 6 ms 9728 KB Output is correct
23 Correct 6 ms 9728 KB Output is correct
24 Correct 5 ms 9684 KB Output is correct
25 Correct 6 ms 9724 KB Output is correct
26 Correct 6 ms 9684 KB Output is correct
27 Correct 6 ms 9684 KB Output is correct
28 Correct 6 ms 9684 KB Output is correct
29 Correct 108 ms 16988 KB Output is correct
30 Correct 171 ms 16928 KB Output is correct
31 Correct 138 ms 17636 KB Output is correct
32 Correct 115 ms 17060 KB Output is correct
33 Correct 126 ms 17100 KB Output is correct
34 Correct 104 ms 16976 KB Output is correct
35 Correct 116 ms 17204 KB Output is correct
36 Correct 148 ms 18040 KB Output is correct
37 Correct 118 ms 17256 KB Output is correct
38 Correct 141 ms 17732 KB Output is correct
39 Correct 93 ms 16472 KB Output is correct
40 Correct 107 ms 16792 KB Output is correct
41 Correct 131 ms 17436 KB Output is correct
42 Correct 148 ms 17860 KB Output is correct
43 Correct 597 ms 17016 KB Output is correct
44 Correct 712 ms 16908 KB Output is correct
45 Correct 720 ms 17812 KB Output is correct
46 Correct 524 ms 17036 KB Output is correct
47 Correct 531 ms 17092 KB Output is correct
48 Correct 182 ms 17060 KB Output is correct
49 Correct 742 ms 17948 KB Output is correct
50 Correct 974 ms 16916 KB Output is correct
51 Correct 824 ms 17352 KB Output is correct
52 Correct 756 ms 17772 KB Output is correct
53 Correct 708 ms 16428 KB Output is correct
54 Correct 1286 ms 16868 KB Output is correct
55 Correct 819 ms 17340 KB Output is correct
56 Correct 740 ms 17816 KB Output is correct

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 9724 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 5 ms 9724 KB Output is correct
7 Correct 5 ms 9728 KB Output is correct
8 Correct 6 ms 9728 KB Output is correct
9 Correct 6 ms 9648 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 6 ms 9684 KB Output is correct
14 Correct 6 ms 9684 KB Output is correct
15 Correct 6 ms 9732 KB Output is correct
16 Correct 5 ms 9684 KB Output is correct
17 Correct 6 ms 9728 KB Output is correct
18 Correct 5 ms 9684 KB Output is correct
19 Correct 6 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 6 ms 9728 KB Output is correct
23 Correct 6 ms 9728 KB Output is correct
24 Correct 5 ms 9684 KB Output is correct
25 Correct 6 ms 9724 KB Output is correct
26 Correct 6 ms 9684 KB Output is correct
27 Correct 6 ms 9684 KB Output is correct
28 Correct 6 ms 9684 KB Output is correct
29 Correct 37 ms 9864 KB Output is correct
30 Correct 42 ms 9884 KB Output is correct
31 Correct 42 ms 9888 KB Output is correct
32 Correct 31 ms 9812 KB Output is correct
33 Correct 21 ms 9884 KB Output is correct
34 Correct 35 ms 9880 KB Output is correct
35 Correct 51 ms 9812 KB Output is correct
36 Correct 47 ms 9812 KB Output is correct
37 Correct 61 ms 9888 KB Output is correct
38 Correct 66 ms 9880 KB Output is correct
39 Correct 51 ms 9888 KB Output is correct
40 Correct 40 ms 9872 KB Output is correct
41 Correct 38 ms 9884 KB Output is correct
42 Correct 38 ms 9812 KB Output is correct
43 Correct 10 ms 9888 KB Output is correct
44 Correct 14 ms 9888 KB Output is correct
45 Correct 16 ms 9812 KB Output is correct
46 Correct 31 ms 9896 KB Output is correct
47 Correct 47 ms 9884 KB Output is correct
48 Correct 45 ms 9812 KB Output is correct
49 Correct 46 ms 9884 KB Output is correct
50 Correct 48 ms 9896 KB Output is correct
51 Correct 104 ms 9872 KB Output is correct
52 Correct 79 ms 9812 KB Output is correct
53 Correct 49 ms 9876 KB Output is correct
54 Correct 51 ms 9892 KB Output is correct
55 Execution timed out 2071 ms 14116 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 9724 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 5 ms 9724 KB Output is correct
7 Correct 5 ms 9728 KB Output is correct
8 Correct 6 ms 9728 KB Output is correct
9 Correct 6 ms 9648 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 6 ms 9684 KB Output is correct
14 Correct 6 ms 9684 KB Output is correct
15 Correct 6 ms 9732 KB Output is correct
16 Correct 5 ms 9684 KB Output is correct
17 Correct 6 ms 9728 KB Output is correct
18 Correct 5 ms 9684 KB Output is correct
19 Correct 6 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 6 ms 9728 KB Output is correct
23 Correct 6 ms 9728 KB Output is correct
24 Correct 5 ms 9684 KB Output is correct
25 Correct 6 ms 9724 KB Output is correct
26 Correct 6 ms 9684 KB Output is correct
27 Correct 6 ms 9684 KB Output is correct
28 Correct 6 ms 9684 KB Output is correct
29 Correct 37 ms 9864 KB Output is correct
30 Correct 42 ms 9884 KB Output is correct
31 Correct 42 ms 9888 KB Output is correct
32 Correct 31 ms 9812 KB Output is correct
33 Correct 21 ms 9884 KB Output is correct
34 Correct 35 ms 9880 KB Output is correct
35 Correct 51 ms 9812 KB Output is correct
36 Correct 47 ms 9812 KB Output is correct
37 Correct 61 ms 9888 KB Output is correct
38 Correct 66 ms 9880 KB Output is correct
39 Correct 51 ms 9888 KB Output is correct
40 Correct 40 ms 9872 KB Output is correct
41 Correct 38 ms 9884 KB Output is correct
42 Correct 38 ms 9812 KB Output is correct
43 Correct 10 ms 9888 KB Output is correct
44 Correct 14 ms 9888 KB Output is correct
45 Correct 16 ms 9812 KB Output is correct
46 Correct 31 ms 9896 KB Output is correct
47 Correct 47 ms 9884 KB Output is correct
48 Correct 45 ms 9812 KB Output is correct
49 Correct 46 ms 9884 KB Output is correct
50 Correct 48 ms 9896 KB Output is correct
51 Correct 104 ms 9872 KB Output is correct
52 Correct 79 ms 9812 KB Output is correct
53 Correct 49 ms 9876 KB Output is correct
54 Correct 51 ms 9892 KB Output is correct
55 Correct 108 ms 16988 KB Output is correct
56 Correct 171 ms 16928 KB Output is correct
57 Correct 138 ms 17636 KB Output is correct
58 Correct 115 ms 17060 KB Output is correct
59 Correct 126 ms 17100 KB Output is correct
60 Correct 104 ms 16976 KB Output is correct
61 Correct 116 ms 17204 KB Output is correct
62 Correct 148 ms 18040 KB Output is correct
63 Correct 118 ms 17256 KB Output is correct
64 Correct 141 ms 17732 KB Output is correct
65 Correct 93 ms 16472 KB Output is correct
66 Correct 107 ms 16792 KB Output is correct
67 Correct 131 ms 17436 KB Output is correct
68 Correct 148 ms 17860 KB Output is correct
69 Correct 597 ms 17016 KB Output is correct
70 Correct 712 ms 16908 KB Output is correct
71 Correct 720 ms 17812 KB Output is correct
72 Correct 524 ms 17036 KB Output is correct
73 Correct 531 ms 17092 KB Output is correct
74 Correct 182 ms 17060 KB Output is correct
75 Correct 742 ms 17948 KB Output is correct
76 Correct 974 ms 16916 KB Output is correct
77 Correct 824 ms 17352 KB Output is correct
78 Correct 756 ms 17772 KB Output is correct
79 Correct 708 ms 16428 KB Output is correct
80 Correct 1286 ms 16868 KB Output is correct
81 Correct 819 ms 17340 KB Output is correct
82 Correct 740 ms 17816 KB Output is correct
83 Execution timed out 2071 ms 14116 KB Time limit exceeded
84 Halted 0 ms 0 KB -