Submission #929155

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
929155	2024-02-17T19:08:49 Z	Joshua_Andersson	Joker (BOI20_joker)	C++14	6 / 100	2000 ms	7100 KB

Joker

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
#define int ll
const int inf = int(1e18);

typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int, int> p2;

#define rep(i, high) for (int i = 0; i < high; i++)
#define repp(i, low, high) for (int i = low; i < high; i++)
#define repe(i, container) for (auto& i : container)
#define sz(container) ((int)container.size())

inline void fast() { ios::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL); }



struct UF
{
	vi size;
	vi par;
	vi parity;

	UF(int n) : size(n, 1), parity(n), par(n)
	{
		rep(i, n)par[i] = i;
	}

	int find(int x) { return x == par[x] ? x : find(par[x]); }
	int getparity(int x) { return x == par[x] ? parity[x] : parity[x] ^ getparity(par[x]); }
	bool oddcycle(int a, int b)
	{
		return getparity(a) == getparity(b);
	}

	void merge(int a, int b)
	{
		//if (size[find(a)] < size[find(b)]) swap(a, b);
		int childa = a;
		int childb = b;
		a = find(a); b = find(b);
		
		if (a != b)
		{
			parity[b] = getparity(childb) ^ getparity(childa) ^ 1;
			size[a] += size[b];
			par[b] = a;
		}
	}
};

signed main()
{
	fast();

	int n, m, q;
	cin >> n >> m >> q;
	vector<p2> edgelist;
	rep(i, m)
	{
		int a, b;
		cin >> a >> b;
		a--; b--;
		edgelist.emplace_back(a, b);
	}
	//shuffle(edgelist.begin(), prev(edgelist.end()), mt19937(3436876));

	while (q--)
	{
		int l, r;
		cin >> l >> r;
		l--; r--;
		UF uf(n);

		bool any = 0;
		rep(i, l)
		{
			int a, b;
			tie(a, b) = edgelist[i];
			if (uf.find(a)==uf.find(b)) any |= uf.oddcycle(a, b);
			uf.merge(a, b);
		}

		repp(i, r+1, m)
		{
			int a, b;
			tie(a, b) = edgelist[i];
			if (uf.find(a) == uf.find(b)) any |= uf.oddcycle(a, b);
			uf.merge(a, b);
		}
		cout << (any ? "YES" : "NO") << "\n";
	}

	return 0;
}

Compilation message

Joker.cpp: In constructor 'UF::UF(ll)':
Joker.cpp:25:5: warning: 'UF::parity' will be initialized after [-Wreorder]
   25 |  vi parity;
      |     ^~~~~~
Joker.cpp:24:5: warning:   'vi UF::par' [-Wreorder]
   24 |  vi par;
      |     ^~~
Joker.cpp:27:2: warning:   when initialized here [-Wreorder]
   27 |  UF(int n) : size(n, 1), parity(n), par(n)
      |  ^~

Subtask #1

6.0 / 6.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	1 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	1 ms	348 KB	Output is correct
8	Correct	1 ms	348 KB	Output is correct
9	Correct	1 ms	348 KB	Output is correct
10	Correct	1 ms	448 KB	Output is correct
11	Correct	1 ms	348 KB	Output is correct
12	Correct	1 ms	348 KB	Output is correct
13	Correct	2 ms	348 KB	Output is correct
14	Correct	1 ms	348 KB	Output is correct
15	Correct	1 ms	348 KB	Output is correct
16	Correct	1 ms	348 KB	Output is correct
17	Correct	1 ms	344 KB	Output is correct
18	Correct	1 ms	348 KB	Output is correct
19	Correct	1 ms	348 KB	Output is correct
20	Correct	3 ms	604 KB	Output is correct
21	Correct	3 ms	348 KB	Output is correct
22	Correct	2 ms	348 KB	Output is correct
23	Correct	2 ms	348 KB	Output is correct
24	Correct	1 ms	348 KB	Output is correct
25	Correct	1 ms	348 KB	Output is correct
26	Correct	1 ms	348 KB	Output is correct
27	Correct	1 ms	348 KB	Output is correct
28	Correct	1 ms	348 KB	Output is correct

Subtask #2

0 / 8.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	1 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	1 ms	348 KB	Output is correct
8	Correct	1 ms	348 KB	Output is correct
9	Correct	1 ms	348 KB	Output is correct
10	Correct	1 ms	448 KB	Output is correct
11	Correct	1 ms	348 KB	Output is correct
12	Correct	1 ms	348 KB	Output is correct
13	Correct	2 ms	348 KB	Output is correct
14	Correct	1 ms	348 KB	Output is correct
15	Correct	1 ms	348 KB	Output is correct
16	Correct	1 ms	348 KB	Output is correct
17	Correct	1 ms	344 KB	Output is correct
18	Correct	1 ms	348 KB	Output is correct
19	Correct	1 ms	348 KB	Output is correct
20	Correct	3 ms	604 KB	Output is correct
21	Correct	3 ms	348 KB	Output is correct
22	Correct	2 ms	348 KB	Output is correct
23	Correct	2 ms	348 KB	Output is correct
24	Correct	1 ms	348 KB	Output is correct
25	Correct	1 ms	348 KB	Output is correct
26	Correct	1 ms	348 KB	Output is correct
27	Correct	1 ms	348 KB	Output is correct
28	Correct	1 ms	348 KB	Output is correct
29	Correct	17 ms	348 KB	Output is correct
30	Correct	142 ms	564 KB	Output is correct
31	Correct	467 ms	556 KB	Output is correct
32	Correct	804 ms	596 KB	Output is correct
33	Correct	946 ms	792 KB	Output is correct
34	Correct	225 ms	564 KB	Output is correct
35	Correct	283 ms	580 KB	Output is correct
36	Execution timed out	2021 ms	536 KB	Time limit exceeded
37	Halted	0 ms	0 KB	-

Subtask #3

0 / 25.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Execution timed out	2086 ms	7100 KB	Time limit exceeded
4	Halted	0 ms	0 KB	-

Subtask #4

0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	1 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	1 ms	348 KB	Output is correct
8	Correct	1 ms	348 KB	Output is correct
9	Correct	1 ms	348 KB	Output is correct
10	Correct	1 ms	448 KB	Output is correct
11	Correct	1 ms	348 KB	Output is correct
12	Correct	1 ms	348 KB	Output is correct
13	Correct	2 ms	348 KB	Output is correct
14	Correct	1 ms	348 KB	Output is correct
15	Correct	1 ms	348 KB	Output is correct
16	Correct	1 ms	348 KB	Output is correct
17	Correct	1 ms	344 KB	Output is correct
18	Correct	1 ms	348 KB	Output is correct
19	Correct	1 ms	348 KB	Output is correct
20	Correct	3 ms	604 KB	Output is correct
21	Correct	3 ms	348 KB	Output is correct
22	Correct	2 ms	348 KB	Output is correct
23	Correct	2 ms	348 KB	Output is correct
24	Correct	1 ms	348 KB	Output is correct
25	Correct	1 ms	348 KB	Output is correct
26	Correct	1 ms	348 KB	Output is correct
27	Correct	1 ms	348 KB	Output is correct
28	Correct	1 ms	348 KB	Output is correct
29	Execution timed out	2086 ms	7100 KB	Time limit exceeded
30	Halted	0 ms	0 KB	-

Subtask #5

0 / 22.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	1 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	1 ms	348 KB	Output is correct
8	Correct	1 ms	348 KB	Output is correct
9	Correct	1 ms	348 KB	Output is correct
10	Correct	1 ms	448 KB	Output is correct
11	Correct	1 ms	348 KB	Output is correct
12	Correct	1 ms	348 KB	Output is correct
13	Correct	2 ms	348 KB	Output is correct
14	Correct	1 ms	348 KB	Output is correct
15	Correct	1 ms	348 KB	Output is correct
16	Correct	1 ms	348 KB	Output is correct
17	Correct	1 ms	344 KB	Output is correct
18	Correct	1 ms	348 KB	Output is correct
19	Correct	1 ms	348 KB	Output is correct
20	Correct	3 ms	604 KB	Output is correct
21	Correct	3 ms	348 KB	Output is correct
22	Correct	2 ms	348 KB	Output is correct
23	Correct	2 ms	348 KB	Output is correct
24	Correct	1 ms	348 KB	Output is correct
25	Correct	1 ms	348 KB	Output is correct
26	Correct	1 ms	348 KB	Output is correct
27	Correct	1 ms	348 KB	Output is correct
28	Correct	1 ms	348 KB	Output is correct
29	Correct	17 ms	348 KB	Output is correct
30	Correct	142 ms	564 KB	Output is correct
31	Correct	467 ms	556 KB	Output is correct
32	Correct	804 ms	596 KB	Output is correct
33	Correct	946 ms	792 KB	Output is correct
34	Correct	225 ms	564 KB	Output is correct
35	Correct	283 ms	580 KB	Output is correct
36	Execution timed out	2021 ms	536 KB	Time limit exceeded
37	Halted	0 ms	0 KB	-

Subtask #6

0 / 29.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	1 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	1 ms	348 KB	Output is correct
8	Correct	1 ms	348 KB	Output is correct
9	Correct	1 ms	348 KB	Output is correct
10	Correct	1 ms	448 KB	Output is correct
11	Correct	1 ms	348 KB	Output is correct
12	Correct	1 ms	348 KB	Output is correct
13	Correct	2 ms	348 KB	Output is correct
14	Correct	1 ms	348 KB	Output is correct
15	Correct	1 ms	348 KB	Output is correct
16	Correct	1 ms	348 KB	Output is correct
17	Correct	1 ms	344 KB	Output is correct
18	Correct	1 ms	348 KB	Output is correct
19	Correct	1 ms	348 KB	Output is correct
20	Correct	3 ms	604 KB	Output is correct
21	Correct	3 ms	348 KB	Output is correct
22	Correct	2 ms	348 KB	Output is correct
23	Correct	2 ms	348 KB	Output is correct
24	Correct	1 ms	348 KB	Output is correct
25	Correct	1 ms	348 KB	Output is correct
26	Correct	1 ms	348 KB	Output is correct
27	Correct	1 ms	348 KB	Output is correct
28	Correct	1 ms	348 KB	Output is correct
29	Correct	17 ms	348 KB	Output is correct
30	Correct	142 ms	564 KB	Output is correct
31	Correct	467 ms	556 KB	Output is correct
32	Correct	804 ms	596 KB	Output is correct
33	Correct	946 ms	792 KB	Output is correct
34	Correct	225 ms	564 KB	Output is correct
35	Correct	283 ms	580 KB	Output is correct
36	Execution timed out	2021 ms	536 KB	Time limit exceeded
37	Halted	0 ms	0 KB	-