Submission #925914

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
925914	2024-02-12T10:42:44 Z	vjudge1	Joker (BOI20_joker)	C++17	36 / 100	2000 ms	18228 KB

Joker

//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
//#pragma GCC optimize("Ofast,unroll-loops,fast-math,O3")

#include<bits/stdc++.h>	

using namespace std;

#define all(a) a.begin(), a.end()                                                   
#define rall(a) a.rbegin(), a.rend()                 
#define sz(a) (int)a.size()
#define s second
#define f first
 
using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
     
vector<pii> rid = {{0, 1}, {0, -1}, {1, 0}, {-1, 0}};
vector<pii> dir = {{-1, -1}, {-1, 1}, {1, -1}, {1, 1}};
 
const int N = 4e5 + 1, mod = 998244353;

const ll inf = 1e9;
 
double eps = 1e-15;
                                                
bool flg = 0;

const int k = 2000;

bool ok = 1, was[N];
vector<pii> g(N);

int p[N + 1], pr[N];
int sz[N + 1], pt[N + 1];
vector<array<int, 2>> h;

pii get(int x) {
 	if (p[x] == x) return {x, 0};
 	pii val = get(p[x]);
 	return {val.f, (pr[x] + val.s) % 2};
}

void add(int id) {
	int u = g[id].f;
	int v = g[id].s;
	pii x = get(u);
	pii y = get(v);
	if (x.f == y.f) {
		if (x.s == y.s) {
			if (ok) {
			    h.push_back({-1, -1});
				ok = 0;
			}    
		}
		return;
	}
	if (sz[x.f] > sz[y.f]) swap(x, y);
	h.push_back({x.f, sz[x.f]});
	h.push_back({y.f, sz[y.f]});
	p[x.f] = y.f;
	pr[x.f] = (x.s + y.s + 1) % 2;  	
	sz[y.f] += sz[x.f];
}

void rb() {
	while (sz(h) && !pt[sz(h)]) {
		array<int, 2> x = h.back();
		h.pop_back();
		if (x[0] == -1) {
			ok = 1;
			continue;
		}
		p[x[0]] = x[0];
		pr[x[0]] = 0;
		sz[x[0]] = x[1];
	}
	pt[sz(h)] = 0; 
}

bool slave(int l, int r) {
	for (int i = l; i <= r; i++) add(i);
	bool vv = ok;
	rb();
	return vv;	
}

bool cmp(array<int, 3> a, array<int, 3> b) {
	if (a[0] / k < b[0] / k) return 1;
	if (a[0] / k == b[0] / k && a[1] < b[1]) return 1;
	return 0;
}

void slv() {
	int n, m, q;
	cin >> n >> m >> q;
	for (int i = 1; i <= m; i++) {
		int u, v;
		cin >> u >> v;
		g[i] = g[i + m] = {u, v};
	}
	for (int i = 1; i <= n; i++) 
		p[i] = i, sz[i] = 1;
	vector<array<int, 3>> qr;
	bool ans[q + 1];
	for (int i = 1; i <= q; i++) {
		int l, r;
		cin >> l >> r;
		int tl = r + 1, tr = l + m - 1;
		if (tl / k == tr / k) 
			ans[i] = slave(tl, tr);
		else qr.push_back({tl, tr, i});
	}
	sort(all(qr), cmp);
	int tr = 0, lst = -1, pos;
	for (auto [l, r, id]: qr) {
		if (l / k != lst) {
			rb();
			lst = l / k;
			pos = (lst + 1) * k - 1;
			tr = pos;
		}
		while (tr < r) 
			add(++tr);
		pt[sz(h)] = 1;
		for (int i = pos; i >= l; i--) 
			add(i);
		ans[id] = ok;
		rb();
		
	}
	for (int i = 1; i <= q; i++) {
		if (ans[i]) cout << "NO\n";
		else cout << "YES\n";
	}
}                                                                           
 
main() {
	//freopen("rsq.in", "r", stdin);                                                                                     
	//freopen("rsq.out", "w", stdout);                                                                                     
	ios_base::sync_with_stdio(0);	                                                                                       
	cin.tie(0);
	int tp = 1;
	if (flg) cin >> tp;
	while (tp--) {  	
		slv();
	}
}
//wenomechainsama

Compilation message

Joker.cpp:140:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  140 | main() {
      | ^~~~
Joker.cpp: In function 'void slv()':
Joker.cpp:128:3: warning: 'pos' may be used uninitialized in this function [-Wmaybe-uninitialized]
  128 |   for (int i = pos; i >= l; i--)
      |   ^~~

Subtask #1
6.0 / 6.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	7516 KB	Output is correct
2	Correct	2 ms	7516 KB	Output is correct
3	Correct	3 ms	9564 KB	Output is correct
4	Correct	2 ms	9564 KB	Output is correct
5	Correct	4 ms	9564 KB	Output is correct
6	Correct	2 ms	9564 KB	Output is correct
7	Correct	3 ms	9564 KB	Output is correct
8	Correct	3 ms	9564 KB	Output is correct
9	Correct	3 ms	9560 KB	Output is correct
10	Correct	3 ms	9560 KB	Output is correct
11	Correct	3 ms	9564 KB	Output is correct
12	Correct	3 ms	9564 KB	Output is correct
13	Correct	3 ms	9564 KB	Output is correct
14	Correct	3 ms	9564 KB	Output is correct
15	Correct	3 ms	9768 KB	Output is correct
16	Correct	3 ms	9564 KB	Output is correct
17	Correct	2 ms	9564 KB	Output is correct
18	Correct	2 ms	9564 KB	Output is correct
19	Correct	2 ms	9564 KB	Output is correct
20	Correct	3 ms	9564 KB	Output is correct
21	Correct	3 ms	9564 KB	Output is correct
22	Correct	3 ms	9652 KB	Output is correct
23	Correct	4 ms	9820 KB	Output is correct
24	Correct	3 ms	9564 KB	Output is correct
25	Correct	3 ms	9564 KB	Output is correct
26	Correct	2 ms	9564 KB	Output is correct
27	Correct	3 ms	9560 KB	Output is correct
28	Correct	3 ms	9564 KB	Output is correct

Subtask #2
8.0 / 8.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	7516 KB	Output is correct
2	Correct	2 ms	7516 KB	Output is correct
3	Correct	3 ms	9564 KB	Output is correct
4	Correct	2 ms	9564 KB	Output is correct
5	Correct	4 ms	9564 KB	Output is correct
6	Correct	2 ms	9564 KB	Output is correct
7	Correct	3 ms	9564 KB	Output is correct
8	Correct	3 ms	9564 KB	Output is correct
9	Correct	3 ms	9560 KB	Output is correct
10	Correct	3 ms	9560 KB	Output is correct
11	Correct	3 ms	9564 KB	Output is correct
12	Correct	3 ms	9564 KB	Output is correct
13	Correct	3 ms	9564 KB	Output is correct
14	Correct	3 ms	9564 KB	Output is correct
15	Correct	3 ms	9768 KB	Output is correct
16	Correct	3 ms	9564 KB	Output is correct
17	Correct	2 ms	9564 KB	Output is correct
18	Correct	2 ms	9564 KB	Output is correct
19	Correct	2 ms	9564 KB	Output is correct
20	Correct	3 ms	9564 KB	Output is correct
21	Correct	3 ms	9564 KB	Output is correct
22	Correct	3 ms	9652 KB	Output is correct
23	Correct	4 ms	9820 KB	Output is correct
24	Correct	3 ms	9564 KB	Output is correct
25	Correct	3 ms	9564 KB	Output is correct
26	Correct	2 ms	9564 KB	Output is correct
27	Correct	3 ms	9560 KB	Output is correct
28	Correct	3 ms	9564 KB	Output is correct
29	Correct	40 ms	9820 KB	Output is correct
30	Correct	24 ms	9816 KB	Output is correct
31	Correct	35 ms	9820 KB	Output is correct
32	Correct	39 ms	9824 KB	Output is correct
33	Correct	28 ms	9820 KB	Output is correct
34	Correct	15 ms	9820 KB	Output is correct
35	Correct	38 ms	9820 KB	Output is correct
36	Correct	8 ms	9820 KB	Output is correct
37	Correct	51 ms	9856 KB	Output is correct
38	Correct	37 ms	9816 KB	Output is correct
39	Correct	25 ms	9820 KB	Output is correct
40	Correct	8 ms	9816 KB	Output is correct
41	Correct	8 ms	9820 KB	Output is correct
42	Correct	8 ms	9820 KB	Output is correct
43	Correct	38 ms	9868 KB	Output is correct
44	Correct	29 ms	9876 KB	Output is correct
45	Correct	44 ms	9820 KB	Output is correct
46	Correct	34 ms	9820 KB	Output is correct
47	Correct	24 ms	9820 KB	Output is correct
48	Correct	31 ms	9816 KB	Output is correct
49	Correct	30 ms	9820 KB	Output is correct
50	Correct	41 ms	9860 KB	Output is correct
51	Correct	29 ms	9820 KB	Output is correct
52	Correct	30 ms	9820 KB	Output is correct
53	Correct	33 ms	9852 KB	Output is correct
54	Correct	37 ms	9820 KB	Output is correct

Subtask #3
0 / 25.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	7516 KB	Output is correct
2	Correct	2 ms	7516 KB	Output is correct
3	Execution timed out	2074 ms	18228 KB	Time limit exceeded
4	Halted	0 ms	0 KB	-

Subtask #4
0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	7516 KB	Output is correct
2	Correct	2 ms	7516 KB	Output is correct
3	Correct	3 ms	9564 KB	Output is correct
4	Correct	2 ms	9564 KB	Output is correct
5	Correct	4 ms	9564 KB	Output is correct
6	Correct	2 ms	9564 KB	Output is correct
7	Correct	3 ms	9564 KB	Output is correct
8	Correct	3 ms	9564 KB	Output is correct
9	Correct	3 ms	9560 KB	Output is correct
10	Correct	3 ms	9560 KB	Output is correct
11	Correct	3 ms	9564 KB	Output is correct
12	Correct	3 ms	9564 KB	Output is correct
13	Correct	3 ms	9564 KB	Output is correct
14	Correct	3 ms	9564 KB	Output is correct
15	Correct	3 ms	9768 KB	Output is correct
16	Correct	3 ms	9564 KB	Output is correct
17	Correct	2 ms	9564 KB	Output is correct
18	Correct	2 ms	9564 KB	Output is correct
19	Correct	2 ms	9564 KB	Output is correct
20	Correct	3 ms	9564 KB	Output is correct
21	Correct	3 ms	9564 KB	Output is correct
22	Correct	3 ms	9652 KB	Output is correct
23	Correct	4 ms	9820 KB	Output is correct
24	Correct	3 ms	9564 KB	Output is correct
25	Correct	3 ms	9564 KB	Output is correct
26	Correct	2 ms	9564 KB	Output is correct
27	Correct	3 ms	9560 KB	Output is correct
28	Correct	3 ms	9564 KB	Output is correct
29	Execution timed out	2074 ms	18228 KB	Time limit exceeded
30	Halted	0 ms	0 KB	-

Subtask #5
22.0 / 22.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	7516 KB	Output is correct
2	Correct	2 ms	7516 KB	Output is correct
3	Correct	3 ms	9564 KB	Output is correct
4	Correct	2 ms	9564 KB	Output is correct
5	Correct	4 ms	9564 KB	Output is correct
6	Correct	2 ms	9564 KB	Output is correct
7	Correct	3 ms	9564 KB	Output is correct
8	Correct	3 ms	9564 KB	Output is correct
9	Correct	3 ms	9560 KB	Output is correct
10	Correct	3 ms	9560 KB	Output is correct
11	Correct	3 ms	9564 KB	Output is correct
12	Correct	3 ms	9564 KB	Output is correct
13	Correct	3 ms	9564 KB	Output is correct
14	Correct	3 ms	9564 KB	Output is correct
15	Correct	3 ms	9768 KB	Output is correct
16	Correct	3 ms	9564 KB	Output is correct
17	Correct	2 ms	9564 KB	Output is correct
18	Correct	2 ms	9564 KB	Output is correct
19	Correct	2 ms	9564 KB	Output is correct
20	Correct	3 ms	9564 KB	Output is correct
21	Correct	3 ms	9564 KB	Output is correct
22	Correct	3 ms	9652 KB	Output is correct
23	Correct	4 ms	9820 KB	Output is correct
24	Correct	3 ms	9564 KB	Output is correct
25	Correct	3 ms	9564 KB	Output is correct
26	Correct	2 ms	9564 KB	Output is correct
27	Correct	3 ms	9560 KB	Output is correct
28	Correct	3 ms	9564 KB	Output is correct
29	Correct	40 ms	9820 KB	Output is correct
30	Correct	24 ms	9816 KB	Output is correct
31	Correct	35 ms	9820 KB	Output is correct
32	Correct	39 ms	9824 KB	Output is correct
33	Correct	28 ms	9820 KB	Output is correct
34	Correct	15 ms	9820 KB	Output is correct
35	Correct	38 ms	9820 KB	Output is correct
36	Correct	8 ms	9820 KB	Output is correct
37	Correct	51 ms	9856 KB	Output is correct
38	Correct	37 ms	9816 KB	Output is correct
39	Correct	25 ms	9820 KB	Output is correct
40	Correct	8 ms	9816 KB	Output is correct
41	Correct	8 ms	9820 KB	Output is correct
42	Correct	8 ms	9820 KB	Output is correct
43	Correct	38 ms	9868 KB	Output is correct
44	Correct	29 ms	9876 KB	Output is correct
45	Correct	44 ms	9820 KB	Output is correct
46	Correct	34 ms	9820 KB	Output is correct
47	Correct	24 ms	9820 KB	Output is correct
48	Correct	31 ms	9816 KB	Output is correct
49	Correct	30 ms	9820 KB	Output is correct
50	Correct	41 ms	9860 KB	Output is correct
51	Correct	29 ms	9820 KB	Output is correct
52	Correct	30 ms	9820 KB	Output is correct
53	Correct	33 ms	9852 KB	Output is correct
54	Correct	37 ms	9820 KB	Output is correct
55	Correct	349 ms	14052 KB	Output is correct
56	Correct	674 ms	17200 KB	Output is correct
57	Correct	553 ms	17624 KB	Output is correct
58	Correct	435 ms	14056 KB	Output is correct
59	Correct	873 ms	14044 KB	Output is correct
60	Correct	959 ms	17876 KB	Output is correct
61	Correct	599 ms	14044 KB	Output is correct
62	Correct	684 ms	17112 KB	Output is correct
63	Correct	662 ms	13112 KB	Output is correct
64	Correct	811 ms	14244 KB	Output is correct
65	Correct	852 ms	17468 KB	Output is correct

Subtask #6
0 / 29.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	7516 KB	Output is correct
2	Correct	2 ms	7516 KB	Output is correct
3	Correct	3 ms	9564 KB	Output is correct
4	Correct	2 ms	9564 KB	Output is correct
5	Correct	4 ms	9564 KB	Output is correct
6	Correct	2 ms	9564 KB	Output is correct
7	Correct	3 ms	9564 KB	Output is correct
8	Correct	3 ms	9564 KB	Output is correct
9	Correct	3 ms	9560 KB	Output is correct
10	Correct	3 ms	9560 KB	Output is correct
11	Correct	3 ms	9564 KB	Output is correct
12	Correct	3 ms	9564 KB	Output is correct
13	Correct	3 ms	9564 KB	Output is correct
14	Correct	3 ms	9564 KB	Output is correct
15	Correct	3 ms	9768 KB	Output is correct
16	Correct	3 ms	9564 KB	Output is correct
17	Correct	2 ms	9564 KB	Output is correct
18	Correct	2 ms	9564 KB	Output is correct
19	Correct	2 ms	9564 KB	Output is correct
20	Correct	3 ms	9564 KB	Output is correct
21	Correct	3 ms	9564 KB	Output is correct
22	Correct	3 ms	9652 KB	Output is correct
23	Correct	4 ms	9820 KB	Output is correct
24	Correct	3 ms	9564 KB	Output is correct
25	Correct	3 ms	9564 KB	Output is correct
26	Correct	2 ms	9564 KB	Output is correct
27	Correct	3 ms	9560 KB	Output is correct
28	Correct	3 ms	9564 KB	Output is correct
29	Correct	40 ms	9820 KB	Output is correct
30	Correct	24 ms	9816 KB	Output is correct
31	Correct	35 ms	9820 KB	Output is correct
32	Correct	39 ms	9824 KB	Output is correct
33	Correct	28 ms	9820 KB	Output is correct
34	Correct	15 ms	9820 KB	Output is correct
35	Correct	38 ms	9820 KB	Output is correct
36	Correct	8 ms	9820 KB	Output is correct
37	Correct	51 ms	9856 KB	Output is correct
38	Correct	37 ms	9816 KB	Output is correct
39	Correct	25 ms	9820 KB	Output is correct
40	Correct	8 ms	9816 KB	Output is correct
41	Correct	8 ms	9820 KB	Output is correct
42	Correct	8 ms	9820 KB	Output is correct
43	Correct	38 ms	9868 KB	Output is correct
44	Correct	29 ms	9876 KB	Output is correct
45	Correct	44 ms	9820 KB	Output is correct
46	Correct	34 ms	9820 KB	Output is correct
47	Correct	24 ms	9820 KB	Output is correct
48	Correct	31 ms	9816 KB	Output is correct
49	Correct	30 ms	9820 KB	Output is correct
50	Correct	41 ms	9860 KB	Output is correct
51	Correct	29 ms	9820 KB	Output is correct
52	Correct	30 ms	9820 KB	Output is correct
53	Correct	33 ms	9852 KB	Output is correct
54	Correct	37 ms	9820 KB	Output is correct
55	Execution timed out	2074 ms	18228 KB	Time limit exceeded
56	Halted	0 ms	0 KB	-

Submission #925914

Compilation message

Subtask #1 6.0 / 6.0

Subtask #2 8.0 / 8.0

Subtask #3 0 / 25.0

Subtask #4 0 / 10.0

Subtask #5 22.0 / 22.0

Subtask #6 0 / 29.0

Subtask #1
6.0 / 6.0

Subtask #2
8.0 / 8.0

Subtask #3
0 / 25.0

Subtask #4
0 / 10.0

Subtask #5
22.0 / 22.0

Subtask #6
0 / 29.0