oj.uz

Submission #810471

# Submission time Handle Problem Language Result Execution time Memory
810471 2023-08-06T10:02:17 Z ymm Joker (BOI20_joker) C++17
14 / 100
 2000 ms 5232 KB 
#include <bits/stdc++.h>
#define Loop(x,l,r) for (ll x = (l); x < (r); ++x)
typedef std::pair<int,int> pii;
typedef long long ll;
using namespace std;

const int N = 200'010;

namespace dsu {
	int par[N];
	int sz[N];
	bool parpar[N];

	void init() { fill(par, par+N, -1); fill(sz, sz+N, 1); }
	pii rt(int v) {
		int p = 0;
		while (par[v] != -1) {
			p ^= parpar[v];
			v = par[v];
		}
		return {v, p};
	}
	bool can(int v, int u) {
		auto [x1, y1] = rt(v);
		auto [x2, y2] = rt(u);
		return x1 != x2 || y1 != y2;
	}
	vector<pii> his;
	bool unite(int v, int u) {
		auto [x1, y1] = rt(v);
		auto [x2, y2] = rt(u);
		if (x1 == x2) {
			if (y1 == y2)
				return 0;
			his.push_back({-1, -1});
			return 1;
		}
		if (sz[x1] < sz[x2]) {
			swap(x1, x2);
			swap(y1, y2);
		}
		par[x2] = x1;
		parpar[x2] = 1 ^ y1 ^ y2;
		sz[x1] += sz[x2];
		his.emplace_back(x1, x2);
		return 1;
	}
	void undo() {
		auto [x1, x2] = his.back();
		his.pop_back();
		if (x2 == -1)
			return;
		sz[x1] -= sz[x2];
		par[x2] = -1;
	}
}

pii E[N];
bool unite(int i) { return dsu::unite(E[i].first, E[i].second); }

int L, R;
vector<int> dir;

void undo() {
	dsu::undo();
	if (dir.back() == 0)
		--L;
	else
		++R;
	dir.pop_back();
}

bool mov(int l, int r)
{
	if (l > r)
		return 0;
	while (l < L)
		undo();
	while (R < r)
		undo();
	while (L < l) {
		if (!unite(L))
			return 0;
		dir.push_back(0);
		++L;
	}
	while (r < R) {
		if (!unite(R-1))
			return 0;
		dir.push_back(1);
		--R;
	}
	return 1;
}

int mn_ac[N];

void dc(int l1, int r1, int l2, int r2)
{
	if (l1 >= r1)
		return;
	//cerr << l1 << ' ' << r1 << " -> " << l2 << ' ' << r2 << '\n';
	int m = (l1 + r1)/2;
	mov(l1, r2-1);
	if (!mov(m, r2-1)) {
		Loop (i,m,r1)
			mn_ac[i] = N;
		dc(l1, m, l2, r2);
		return;
	}
	while (mov(m, R-1));
	int ans = R;
	mn_ac[m] = ans;
	//cerr << "mn[" << m << "] = " << ans << '\n';
	dc(l1, m, l2, r2);
	dc(m+1, r1, l2, r2);
}

int main()
{
	cin.tie(0) -> sync_with_stdio(false);
	int n, m, q;
	cin >> n >> m >> q;
	dsu::init();
	L = 0;
	R = m;
	Loop (i,0,m) {
		int v, u;
		cin >> v >> u;
		E[i] = {v, u};
	}
	dc(0, m+1, 0, m+1);
	Loop (i,0,q) {
		int l, r;
		cin >> l >> r;
		--l;
		if (r >= mn_ac[l])
		//if (mov(l, r))
			cout << "NO\n";
		else
			cout << "YES\n";
	}
}

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1876 KB Output is correct
2 Correct 1 ms 1876 KB Output is correct
3 Correct 1 ms 1876 KB Output is correct
4 Correct 1 ms 1876 KB Output is correct
5 Correct 1 ms 1876 KB Output is correct
6 Correct 1 ms 1876 KB Output is correct
7 Correct 1 ms 1876 KB Output is correct
8 Correct 1 ms 1876 KB Output is correct
9 Correct 1 ms 1876 KB Output is correct
10 Correct 1 ms 1876 KB Output is correct
11 Correct 1 ms 1876 KB Output is correct
12 Correct 1 ms 1876 KB Output is correct
13 Correct 1 ms 1876 KB Output is correct
14 Correct 1 ms 1876 KB Output is correct
15 Correct 1 ms 1876 KB Output is correct
16 Correct 1 ms 1876 KB Output is correct
17 Correct 1 ms 1876 KB Output is correct
18 Correct 1 ms 1876 KB Output is correct
19 Correct 1 ms 1876 KB Output is correct
20 Correct 1 ms 1876 KB Output is correct
21 Correct 2 ms 1876 KB Output is correct
22 Correct 1 ms 1876 KB Output is correct
23 Correct 1 ms 1876 KB Output is correct
24 Correct 1 ms 1876 KB Output is correct
25 Correct 1 ms 1876 KB Output is correct
26 Correct 1 ms 1876 KB Output is correct
27 Correct 1 ms 1876 KB Output is correct
28 Correct 1 ms 1876 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1876 KB Output is correct
2 Correct 1 ms 1876 KB Output is correct
3 Correct 1 ms 1876 KB Output is correct
4 Correct 1 ms 1876 KB Output is correct
5 Correct 1 ms 1876 KB Output is correct
6 Correct 1 ms 1876 KB Output is correct
7 Correct 1 ms 1876 KB Output is correct
8 Correct 1 ms 1876 KB Output is correct
9 Correct 1 ms 1876 KB Output is correct
10 Correct 1 ms 1876 KB Output is correct
11 Correct 1 ms 1876 KB Output is correct
12 Correct 1 ms 1876 KB Output is correct
13 Correct 1 ms 1876 KB Output is correct
14 Correct 1 ms 1876 KB Output is correct
15 Correct 1 ms 1876 KB Output is correct
16 Correct 1 ms 1876 KB Output is correct
17 Correct 1 ms 1876 KB Output is correct
18 Correct 1 ms 1876 KB Output is correct
19 Correct 1 ms 1876 KB Output is correct
20 Correct 1 ms 1876 KB Output is correct
21 Correct 2 ms 1876 KB Output is correct
22 Correct 1 ms 1876 KB Output is correct
23 Correct 1 ms 1876 KB Output is correct
24 Correct 1 ms 1876 KB Output is correct
25 Correct 1 ms 1876 KB Output is correct
26 Correct 1 ms 1876 KB Output is correct
27 Correct 1 ms 1876 KB Output is correct
28 Correct 1 ms 1876 KB Output is correct
29 Correct 9 ms 1876 KB Output is correct
30 Correct 9 ms 1876 KB Output is correct
31 Correct 7 ms 1948 KB Output is correct
32 Correct 4 ms 1876 KB Output is correct
33 Correct 2 ms 1876 KB Output is correct
34 Correct 9 ms 1876 KB Output is correct
35 Correct 11 ms 1876 KB Output is correct
36 Correct 10 ms 1876 KB Output is correct
37 Correct 25 ms 1876 KB Output is correct
38 Correct 38 ms 1936 KB Output is correct
39 Correct 3 ms 1876 KB Output is correct
40 Correct 2 ms 1876 KB Output is correct
41 Correct 2 ms 1876 KB Output is correct
42 Correct 2 ms 1876 KB Output is correct
43 Correct 3 ms 1876 KB Output is correct
44 Correct 4 ms 1876 KB Output is correct
45 Correct 5 ms 1876 KB Output is correct
46 Correct 10 ms 1876 KB Output is correct
47 Correct 5 ms 1944 KB Output is correct
48 Correct 7 ms 1876 KB Output is correct
49 Correct 7 ms 1948 KB Output is correct
50 Correct 10 ms 1876 KB Output is correct
51 Correct 3 ms 1876 KB Output is correct
52 Correct 4 ms 1924 KB Output is correct
53 Correct 6 ms 1940 KB Output is correct
54 Correct 11 ms 1948 KB Output is correct

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1876 KB Output is correct
2 Correct 1 ms 1876 KB Output is correct
3 Execution timed out 2068 ms 5232 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1876 KB Output is correct
2 Correct 1 ms 1876 KB Output is correct
3 Correct 1 ms 1876 KB Output is correct
4 Correct 1 ms 1876 KB Output is correct
5 Correct 1 ms 1876 KB Output is correct
6 Correct 1 ms 1876 KB Output is correct
7 Correct 1 ms 1876 KB Output is correct
8 Correct 1 ms 1876 KB Output is correct
9 Correct 1 ms 1876 KB Output is correct
10 Correct 1 ms 1876 KB Output is correct
11 Correct 1 ms 1876 KB Output is correct
12 Correct 1 ms 1876 KB Output is correct
13 Correct 1 ms 1876 KB Output is correct
14 Correct 1 ms 1876 KB Output is correct
15 Correct 1 ms 1876 KB Output is correct
16 Correct 1 ms 1876 KB Output is correct
17 Correct 1 ms 1876 KB Output is correct
18 Correct 1 ms 1876 KB Output is correct
19 Correct 1 ms 1876 KB Output is correct
20 Correct 1 ms 1876 KB Output is correct
21 Correct 2 ms 1876 KB Output is correct
22 Correct 1 ms 1876 KB Output is correct
23 Correct 1 ms 1876 KB Output is correct
24 Correct 1 ms 1876 KB Output is correct
25 Correct 1 ms 1876 KB Output is correct
26 Correct 1 ms 1876 KB Output is correct
27 Correct 1 ms 1876 KB Output is correct
28 Correct 1 ms 1876 KB Output is correct
29 Execution timed out 2068 ms 5232 KB Time limit exceeded
30 Halted 0 ms 0 KB -

Subtask #5
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1876 KB Output is correct
2 Correct 1 ms 1876 KB Output is correct
3 Correct 1 ms 1876 KB Output is correct
4 Correct 1 ms 1876 KB Output is correct
5 Correct 1 ms 1876 KB Output is correct
6 Correct 1 ms 1876 KB Output is correct
7 Correct 1 ms 1876 KB Output is correct
8 Correct 1 ms 1876 KB Output is correct
9 Correct 1 ms 1876 KB Output is correct
10 Correct 1 ms 1876 KB Output is correct
11 Correct 1 ms 1876 KB Output is correct
12 Correct 1 ms 1876 KB Output is correct
13 Correct 1 ms 1876 KB Output is correct
14 Correct 1 ms 1876 KB Output is correct
15 Correct 1 ms 1876 KB Output is correct
16 Correct 1 ms 1876 KB Output is correct
17 Correct 1 ms 1876 KB Output is correct
18 Correct 1 ms 1876 KB Output is correct
19 Correct 1 ms 1876 KB Output is correct
20 Correct 1 ms 1876 KB Output is correct
21 Correct 2 ms 1876 KB Output is correct
22 Correct 1 ms 1876 KB Output is correct
23 Correct 1 ms 1876 KB Output is correct
24 Correct 1 ms 1876 KB Output is correct
25 Correct 1 ms 1876 KB Output is correct
26 Correct 1 ms 1876 KB Output is correct
27 Correct 1 ms 1876 KB Output is correct
28 Correct 1 ms 1876 KB Output is correct
29 Correct 9 ms 1876 KB Output is correct
30 Correct 9 ms 1876 KB Output is correct
31 Correct 7 ms 1948 KB Output is correct
32 Correct 4 ms 1876 KB Output is correct
33 Correct 2 ms 1876 KB Output is correct
34 Correct 9 ms 1876 KB Output is correct
35 Correct 11 ms 1876 KB Output is correct
36 Correct 10 ms 1876 KB Output is correct
37 Correct 25 ms 1876 KB Output is correct
38 Correct 38 ms 1936 KB Output is correct
39 Correct 3 ms 1876 KB Output is correct
40 Correct 2 ms 1876 KB Output is correct
41 Correct 2 ms 1876 KB Output is correct
42 Correct 2 ms 1876 KB Output is correct
43 Correct 3 ms 1876 KB Output is correct
44 Correct 4 ms 1876 KB Output is correct
45 Correct 5 ms 1876 KB Output is correct
46 Correct 10 ms 1876 KB Output is correct
47 Correct 5 ms 1944 KB Output is correct
48 Correct 7 ms 1876 KB Output is correct
49 Correct 7 ms 1948 KB Output is correct
50 Correct 10 ms 1876 KB Output is correct
51 Correct 3 ms 1876 KB Output is correct
52 Correct 4 ms 1924 KB Output is correct
53 Correct 6 ms 1940 KB Output is correct
54 Correct 11 ms 1948 KB Output is correct
55 Execution timed out 2044 ms 5184 KB Time limit exceeded
56 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1876 KB Output is correct
2 Correct 1 ms 1876 KB Output is correct
3 Correct 1 ms 1876 KB Output is correct
4 Correct 1 ms 1876 KB Output is correct
5 Correct 1 ms 1876 KB Output is correct
6 Correct 1 ms 1876 KB Output is correct
7 Correct 1 ms 1876 KB Output is correct
8 Correct 1 ms 1876 KB Output is correct
9 Correct 1 ms 1876 KB Output is correct
10 Correct 1 ms 1876 KB Output is correct
11 Correct 1 ms 1876 KB Output is correct
12 Correct 1 ms 1876 KB Output is correct
13 Correct 1 ms 1876 KB Output is correct
14 Correct 1 ms 1876 KB Output is correct
15 Correct 1 ms 1876 KB Output is correct
16 Correct 1 ms 1876 KB Output is correct
17 Correct 1 ms 1876 KB Output is correct
18 Correct 1 ms 1876 KB Output is correct
19 Correct 1 ms 1876 KB Output is correct
20 Correct 1 ms 1876 KB Output is correct
21 Correct 2 ms 1876 KB Output is correct
22 Correct 1 ms 1876 KB Output is correct
23 Correct 1 ms 1876 KB Output is correct
24 Correct 1 ms 1876 KB Output is correct
25 Correct 1 ms 1876 KB Output is correct
26 Correct 1 ms 1876 KB Output is correct
27 Correct 1 ms 1876 KB Output is correct
28 Correct 1 ms 1876 KB Output is correct
29 Correct 9 ms 1876 KB Output is correct
30 Correct 9 ms 1876 KB Output is correct
31 Correct 7 ms 1948 KB Output is correct
32 Correct 4 ms 1876 KB Output is correct
33 Correct 2 ms 1876 KB Output is correct
34 Correct 9 ms 1876 KB Output is correct
35 Correct 11 ms 1876 KB Output is correct
36 Correct 10 ms 1876 KB Output is correct
37 Correct 25 ms 1876 KB Output is correct
38 Correct 38 ms 1936 KB Output is correct
39 Correct 3 ms 1876 KB Output is correct
40 Correct 2 ms 1876 KB Output is correct
41 Correct 2 ms 1876 KB Output is correct
42 Correct 2 ms 1876 KB Output is correct
43 Correct 3 ms 1876 KB Output is correct
44 Correct 4 ms 1876 KB Output is correct
45 Correct 5 ms 1876 KB Output is correct
46 Correct 10 ms 1876 KB Output is correct
47 Correct 5 ms 1944 KB Output is correct
48 Correct 7 ms 1876 KB Output is correct
49 Correct 7 ms 1948 KB Output is correct
50 Correct 10 ms 1876 KB Output is correct
51 Correct 3 ms 1876 KB Output is correct
52 Correct 4 ms 1924 KB Output is correct
53 Correct 6 ms 1940 KB Output is correct
54 Correct 11 ms 1948 KB Output is correct
55 Execution timed out 2068 ms 5232 KB Time limit exceeded
56 Halted 0 ms 0 KB -