oj.uz

Submission #642534

# Submission time Handle Problem Language Result Execution time Memory
642534 2022-09-19T19:56:53 Z dozer Joker (BOI20_joker) C++14
49 / 100
 2000 ms 21572 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 < 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: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 5 ms 9684 KB Output is correct
2 Correct 5 ms 9712 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 5 ms 9684 KB Output is correct
7 Correct 6 ms 9684 KB Output is correct
8 Correct 6 ms 9684 KB Output is correct
9 Correct 6 ms 9684 KB Output is correct
10 Correct 5 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 7 ms 9684 KB Output is correct
15 Correct 6 ms 9724 KB Output is correct
16 Correct 6 ms 9748 KB Output is correct
17 Correct 5 ms 9684 KB Output is correct
18 Correct 6 ms 9732 KB Output is correct
19 Correct 6 ms 9684 KB Output is correct
20 Correct 6 ms 9728 KB Output is correct
21 Correct 6 ms 9724 KB Output is correct
22 Correct 5 ms 9684 KB Output is correct
23 Correct 6 ms 9684 KB Output is correct
24 Correct 6 ms 9760 KB Output is correct
25 Correct 6 ms 9728 KB Output is correct
26 Correct 6 ms 9684 KB Output is correct
27 Correct 6 ms 9684 KB Output is correct
28 Correct 5 ms 9728 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 9712 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 5 ms 9684 KB Output is correct
7 Correct 6 ms 9684 KB Output is correct
8 Correct 6 ms 9684 KB Output is correct
9 Correct 6 ms 9684 KB Output is correct
10 Correct 5 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 7 ms 9684 KB Output is correct
15 Correct 6 ms 9724 KB Output is correct
16 Correct 6 ms 9748 KB Output is correct
17 Correct 5 ms 9684 KB Output is correct
18 Correct 6 ms 9732 KB Output is correct
19 Correct 6 ms 9684 KB Output is correct
20 Correct 6 ms 9728 KB Output is correct
21 Correct 6 ms 9724 KB Output is correct
22 Correct 5 ms 9684 KB Output is correct
23 Correct 6 ms 9684 KB Output is correct
24 Correct 6 ms 9760 KB Output is correct
25 Correct 6 ms 9728 KB Output is correct
26 Correct 6 ms 9684 KB Output is correct
27 Correct 6 ms 9684 KB Output is correct
28 Correct 5 ms 9728 KB Output is correct
29 Correct 34 ms 9844 KB Output is correct
30 Correct 42 ms 9812 KB Output is correct
31 Correct 42 ms 9884 KB Output is correct
32 Correct 30 ms 9800 KB Output is correct
33 Correct 21 ms 9844 KB Output is correct
34 Correct 36 ms 9812 KB Output is correct
35 Correct 50 ms 9888 KB Output is correct
36 Correct 47 ms 9872 KB Output is correct
37 Correct 60 ms 9896 KB Output is correct
38 Correct 65 ms 9892 KB Output is correct
39 Correct 50 ms 9812 KB Output is correct
40 Correct 39 ms 9888 KB Output is correct
41 Correct 39 ms 9872 KB Output is correct
42 Correct 38 ms 9940 KB Output is correct
43 Correct 10 ms 9880 KB Output is correct
44 Correct 16 ms 9872 KB Output is correct
45 Correct 15 ms 9892 KB Output is correct
46 Correct 32 ms 9812 KB Output is correct
47 Correct 47 ms 9812 KB Output is correct
48 Correct 46 ms 9888 KB Output is correct
49 Correct 48 ms 9896 KB Output is correct
50 Correct 49 ms 9892 KB Output is correct
51 Correct 102 ms 9868 KB Output is correct
52 Correct 80 ms 9872 KB Output is correct
53 Correct 48 ms 9892 KB Output is correct
54 Correct 50 ms 9888 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 9712 KB Output is correct
3 Correct 119 ms 18888 KB Output is correct
4 Correct 155 ms 18924 KB Output is correct
5 Correct 142 ms 19560 KB Output is correct
6 Correct 118 ms 18976 KB Output is correct
7 Correct 119 ms 19052 KB Output is correct
8 Correct 119 ms 18836 KB Output is correct
9 Correct 116 ms 19108 KB Output is correct
10 Correct 153 ms 19992 KB Output is correct
11 Correct 116 ms 19036 KB Output is correct
12 Correct 140 ms 19704 KB Output is correct
13 Correct 105 ms 18488 KB Output is correct
14 Correct 106 ms 18672 KB Output is correct
15 Correct 132 ms 19296 KB Output is correct
16 Correct 149 ms 19824 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 9712 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 5 ms 9684 KB Output is correct
7 Correct 6 ms 9684 KB Output is correct
8 Correct 6 ms 9684 KB Output is correct
9 Correct 6 ms 9684 KB Output is correct
10 Correct 5 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 7 ms 9684 KB Output is correct
15 Correct 6 ms 9724 KB Output is correct
16 Correct 6 ms 9748 KB Output is correct
17 Correct 5 ms 9684 KB Output is correct
18 Correct 6 ms 9732 KB Output is correct
19 Correct 6 ms 9684 KB Output is correct
20 Correct 6 ms 9728 KB Output is correct
21 Correct 6 ms 9724 KB Output is correct
22 Correct 5 ms 9684 KB Output is correct
23 Correct 6 ms 9684 KB Output is correct
24 Correct 6 ms 9760 KB Output is correct
25 Correct 6 ms 9728 KB Output is correct
26 Correct 6 ms 9684 KB Output is correct
27 Correct 6 ms 9684 KB Output is correct
28 Correct 5 ms 9728 KB Output is correct
29 Correct 119 ms 18888 KB Output is correct
30 Correct 155 ms 18924 KB Output is correct
31 Correct 142 ms 19560 KB Output is correct
32 Correct 118 ms 18976 KB Output is correct
33 Correct 119 ms 19052 KB Output is correct
34 Correct 119 ms 18836 KB Output is correct
35 Correct 116 ms 19108 KB Output is correct
36 Correct 153 ms 19992 KB Output is correct
37 Correct 116 ms 19036 KB Output is correct
38 Correct 140 ms 19704 KB Output is correct
39 Correct 105 ms 18488 KB Output is correct
40 Correct 106 ms 18672 KB Output is correct
41 Correct 132 ms 19296 KB Output is correct
42 Correct 149 ms 19824 KB Output is correct
43 Correct 598 ms 20304 KB Output is correct
44 Correct 719 ms 20536 KB Output is correct
45 Correct 717 ms 21364 KB Output is correct
46 Correct 525 ms 20588 KB Output is correct
47 Correct 525 ms 20600 KB Output is correct
48 Correct 179 ms 20828 KB Output is correct
49 Correct 737 ms 21488 KB Output is correct
50 Correct 974 ms 20512 KB Output is correct
51 Correct 828 ms 20932 KB Output is correct
52 Correct 749 ms 21572 KB Output is correct
53 Correct 700 ms 20012 KB Output is correct
54 Correct 1261 ms 20420 KB Output is correct
55 Correct 807 ms 20852 KB Output is correct
56 Correct 735 ms 21532 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 9712 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 5 ms 9684 KB Output is correct
7 Correct 6 ms 9684 KB Output is correct
8 Correct 6 ms 9684 KB Output is correct
9 Correct 6 ms 9684 KB Output is correct
10 Correct 5 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 7 ms 9684 KB Output is correct
15 Correct 6 ms 9724 KB Output is correct
16 Correct 6 ms 9748 KB Output is correct
17 Correct 5 ms 9684 KB Output is correct
18 Correct 6 ms 9732 KB Output is correct
19 Correct 6 ms 9684 KB Output is correct
20 Correct 6 ms 9728 KB Output is correct
21 Correct 6 ms 9724 KB Output is correct
22 Correct 5 ms 9684 KB Output is correct
23 Correct 6 ms 9684 KB Output is correct
24 Correct 6 ms 9760 KB Output is correct
25 Correct 6 ms 9728 KB Output is correct
26 Correct 6 ms 9684 KB Output is correct
27 Correct 6 ms 9684 KB Output is correct
28 Correct 5 ms 9728 KB Output is correct
29 Correct 34 ms 9844 KB Output is correct
30 Correct 42 ms 9812 KB Output is correct
31 Correct 42 ms 9884 KB Output is correct
32 Correct 30 ms 9800 KB Output is correct
33 Correct 21 ms 9844 KB Output is correct
34 Correct 36 ms 9812 KB Output is correct
35 Correct 50 ms 9888 KB Output is correct
36 Correct 47 ms 9872 KB Output is correct
37 Correct 60 ms 9896 KB Output is correct
38 Correct 65 ms 9892 KB Output is correct
39 Correct 50 ms 9812 KB Output is correct
40 Correct 39 ms 9888 KB Output is correct
41 Correct 39 ms 9872 KB Output is correct
42 Correct 38 ms 9940 KB Output is correct
43 Correct 10 ms 9880 KB Output is correct
44 Correct 16 ms 9872 KB Output is correct
45 Correct 15 ms 9892 KB Output is correct
46 Correct 32 ms 9812 KB Output is correct
47 Correct 47 ms 9812 KB Output is correct
48 Correct 46 ms 9888 KB Output is correct
49 Correct 48 ms 9896 KB Output is correct
50 Correct 49 ms 9892 KB Output is correct
51 Correct 102 ms 9868 KB Output is correct
52 Correct 80 ms 9872 KB Output is correct
53 Correct 48 ms 9892 KB Output is correct
54 Correct 50 ms 9888 KB Output is correct
55 Execution timed out 2059 ms 15076 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 9712 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 5 ms 9684 KB Output is correct
7 Correct 6 ms 9684 KB Output is correct
8 Correct 6 ms 9684 KB Output is correct
9 Correct 6 ms 9684 KB Output is correct
10 Correct 5 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 7 ms 9684 KB Output is correct
15 Correct 6 ms 9724 KB Output is correct
16 Correct 6 ms 9748 KB Output is correct
17 Correct 5 ms 9684 KB Output is correct
18 Correct 6 ms 9732 KB Output is correct
19 Correct 6 ms 9684 KB Output is correct
20 Correct 6 ms 9728 KB Output is correct
21 Correct 6 ms 9724 KB Output is correct
22 Correct 5 ms 9684 KB Output is correct
23 Correct 6 ms 9684 KB Output is correct
24 Correct 6 ms 9760 KB Output is correct
25 Correct 6 ms 9728 KB Output is correct
26 Correct 6 ms 9684 KB Output is correct
27 Correct 6 ms 9684 KB Output is correct
28 Correct 5 ms 9728 KB Output is correct
29 Correct 34 ms 9844 KB Output is correct
30 Correct 42 ms 9812 KB Output is correct
31 Correct 42 ms 9884 KB Output is correct
32 Correct 30 ms 9800 KB Output is correct
33 Correct 21 ms 9844 KB Output is correct
34 Correct 36 ms 9812 KB Output is correct
35 Correct 50 ms 9888 KB Output is correct
36 Correct 47 ms 9872 KB Output is correct
37 Correct 60 ms 9896 KB Output is correct
38 Correct 65 ms 9892 KB Output is correct
39 Correct 50 ms 9812 KB Output is correct
40 Correct 39 ms 9888 KB Output is correct
41 Correct 39 ms 9872 KB Output is correct
42 Correct 38 ms 9940 KB Output is correct
43 Correct 10 ms 9880 KB Output is correct
44 Correct 16 ms 9872 KB Output is correct
45 Correct 15 ms 9892 KB Output is correct
46 Correct 32 ms 9812 KB Output is correct
47 Correct 47 ms 9812 KB Output is correct
48 Correct 46 ms 9888 KB Output is correct
49 Correct 48 ms 9896 KB Output is correct
50 Correct 49 ms 9892 KB Output is correct
51 Correct 102 ms 9868 KB Output is correct
52 Correct 80 ms 9872 KB Output is correct
53 Correct 48 ms 9892 KB Output is correct
54 Correct 50 ms 9888 KB Output is correct
55 Correct 119 ms 18888 KB Output is correct
56 Correct 155 ms 18924 KB Output is correct
57 Correct 142 ms 19560 KB Output is correct
58 Correct 118 ms 18976 KB Output is correct
59 Correct 119 ms 19052 KB Output is correct
60 Correct 119 ms 18836 KB Output is correct
61 Correct 116 ms 19108 KB Output is correct
62 Correct 153 ms 19992 KB Output is correct
63 Correct 116 ms 19036 KB Output is correct
64 Correct 140 ms 19704 KB Output is correct
65 Correct 105 ms 18488 KB Output is correct
66 Correct 106 ms 18672 KB Output is correct
67 Correct 132 ms 19296 KB Output is correct
68 Correct 149 ms 19824 KB Output is correct
69 Correct 598 ms 20304 KB Output is correct
70 Correct 719 ms 20536 KB Output is correct
71 Correct 717 ms 21364 KB Output is correct
72 Correct 525 ms 20588 KB Output is correct
73 Correct 525 ms 20600 KB Output is correct
74 Correct 179 ms 20828 KB Output is correct
75 Correct 737 ms 21488 KB Output is correct
76 Correct 974 ms 20512 KB Output is correct
77 Correct 828 ms 20932 KB Output is correct
78 Correct 749 ms 21572 KB Output is correct
79 Correct 700 ms 20012 KB Output is correct
80 Correct 1261 ms 20420 KB Output is correct
81 Correct 807 ms 20852 KB Output is correct
82 Correct 735 ms 21532 KB Output is correct
83 Execution timed out 2059 ms 15076 KB Time limit exceeded
84 Halted 0 ms 0 KB -