Submission #936011

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
936011	2024-02-29T23:57:34 Z	MinaRagy06	Joker (BOI20_joker)	C++17	100 / 100	355 ms	51380 KB

Joker

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define md ((l + r) >> 1)

const int N = 200'005;
int par[N], sz[N], dep[N];
int gud;
array<int, 2> find(int u) {
	if (par[u] == u) {
		return {u, 0};
	}
	array<int, 2> v = find(par[u]);
	v[1] ^= dep[u];
	return v;
}
vector<pair<int*, int>> logs;
void assign(int *x, int y) {
	logs.push_back({x, *x});
	*x = y;
}
void rollback() {
	while (logs.back().first) {
		pair<int*, int> v = logs.back();
		logs.pop_back();
		*v.first = v.second;
	}
	logs.pop_back();
}
void join(int u, int v) {
	array<int, 2> pu = find(u), pv = find(v);
	if (pu[0] == pv[0]) {
		assign(&gud, gud && (dep[pv[0]] == (pv[1] ^ pu[1] ^ 1)));
		return;
	}
	if (sz[pu[0]] < sz[pv[0]]) {
		swap(u, v);
		swap(pu, pv);
	}
	assign(&par[pv[0]], pu[0]);
	assign(&dep[pv[0]], (pv[1] ^ pu[1] ^ 1));
	assign(&sz[pu[0]], sz[pu[0]] + sz[pv[0]]);
}
array<int, 2> a[N];
vector<int> seg[1 << 19];
void add(int i, int l, int r, int s, int e, int x) {
	if (s <= l && r <= e) {
		seg[i].push_back(x);
		return;
	}
	if (r < s || e < l) {
		return;
	}
	add(i << 1, l, md, s, e, x);
	add(i << 1 | 1, md + 1, r, s, e, x);
}
int ptr, mn;
int suf[N];
void solve(int i, int l, int r) {
	logs.push_back({NULL, 0});
	for (auto j : seg[i]) {
		join(a[j][0], a[j][1]);
	}
	if (l == r) {
		while (gud && l < ptr - 1) {
			assign(&ptr, ptr - 1);
			join(a[ptr][0], a[ptr][1]);
			mn = min(mn, ptr);
		}
		if (!gud) suf[l] = ptr;
	} else {
		solve(i << 1 | 1, md + 1, r);
		solve(i << 1, l, md);
	}
	rollback();
	while (ptr > mn) {
		assign(&ptr, ptr - 1);
		join(a[ptr][0], a[ptr][1]);
	}
}
int main() {
	ios_base::sync_with_stdio(0), cin.tie(0);
	int n, m, q;
	cin >> n >> m >> q;
	for (int i = 1; i <= m; i++) {
		cin >> a[i][0] >> a[i][1];
	}
	for (int i = 1; i <= m; i++) {
		add(1, 0, m, i, m, i);
	}
	for (int i = 0; i <= m; i++) {
		suf[i] = 0;
	}
	for (int i = 1; i <= n; i++) {
		par[i] = i;
		sz[i] = 1;
		dep[i] = 0;
	}
	gud = 1;
	ptr = mn = m + 1;
	solve(1, 0, m);
// 	for (int i = 0; i <= m; i++) {
// 		cout << suf[i] << ' ';
// 	}
// 	cout << '\n';
	while (q--) {
		int l, r;
		cin >> l >> r;
		if (r < suf[l - 1]) {
			cout << "YES\n";
		} else {
			cout << "NO\n";
		}
	}
	return 0;
}

Subtask #1
6.0 / 6.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	3 ms	16732 KB	Output is correct
2	Correct	3 ms	16732 KB	Output is correct
3	Correct	3 ms	16728 KB	Output is correct
4	Correct	3 ms	16728 KB	Output is correct
5	Correct	3 ms	16732 KB	Output is correct
6	Correct	3 ms	16732 KB	Output is correct
7	Correct	3 ms	16900 KB	Output is correct
8	Correct	3 ms	16732 KB	Output is correct
9	Correct	4 ms	16816 KB	Output is correct
10	Correct	3 ms	16732 KB	Output is correct
11	Correct	3 ms	16732 KB	Output is correct
12	Correct	4 ms	16732 KB	Output is correct
13	Correct	4 ms	16728 KB	Output is correct
14	Correct	3 ms	16732 KB	Output is correct
15	Correct	3 ms	16732 KB	Output is correct
16	Correct	3 ms	16732 KB	Output is correct
17	Correct	3 ms	16728 KB	Output is correct
18	Correct	3 ms	16732 KB	Output is correct
19	Correct	4 ms	16732 KB	Output is correct
20	Correct	3 ms	16732 KB	Output is correct
21	Correct	3 ms	16732 KB	Output is correct
22	Correct	4 ms	16732 KB	Output is correct
23	Correct	3 ms	16732 KB	Output is correct
24	Correct	4 ms	16732 KB	Output is correct
25	Correct	4 ms	16732 KB	Output is correct
26	Correct	3 ms	16728 KB	Output is correct
27	Correct	3 ms	16732 KB	Output is correct
28	Correct	3 ms	16732 KB	Output is correct

Subtask #2
8.0 / 8.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	3 ms	16732 KB	Output is correct
2	Correct	3 ms	16732 KB	Output is correct
3	Correct	3 ms	16728 KB	Output is correct
4	Correct	3 ms	16728 KB	Output is correct
5	Correct	3 ms	16732 KB	Output is correct
6	Correct	3 ms	16732 KB	Output is correct
7	Correct	3 ms	16900 KB	Output is correct
8	Correct	3 ms	16732 KB	Output is correct
9	Correct	4 ms	16816 KB	Output is correct
10	Correct	3 ms	16732 KB	Output is correct
11	Correct	3 ms	16732 KB	Output is correct
12	Correct	4 ms	16732 KB	Output is correct
13	Correct	4 ms	16728 KB	Output is correct
14	Correct	3 ms	16732 KB	Output is correct
15	Correct	3 ms	16732 KB	Output is correct
16	Correct	3 ms	16732 KB	Output is correct
17	Correct	3 ms	16728 KB	Output is correct
18	Correct	3 ms	16732 KB	Output is correct
19	Correct	4 ms	16732 KB	Output is correct
20	Correct	3 ms	16732 KB	Output is correct
21	Correct	3 ms	16732 KB	Output is correct
22	Correct	4 ms	16732 KB	Output is correct
23	Correct	3 ms	16732 KB	Output is correct
24	Correct	4 ms	16732 KB	Output is correct
25	Correct	4 ms	16732 KB	Output is correct
26	Correct	3 ms	16728 KB	Output is correct
27	Correct	3 ms	16732 KB	Output is correct
28	Correct	3 ms	16732 KB	Output is correct
29	Correct	5 ms	16988 KB	Output is correct
30	Correct	7 ms	17480 KB	Output is correct
31	Correct	5 ms	16984 KB	Output is correct
32	Correct	5 ms	16988 KB	Output is correct
33	Correct	5 ms	16988 KB	Output is correct
34	Correct	5 ms	16988 KB	Output is correct
35	Correct	7 ms	16988 KB	Output is correct
36	Correct	6 ms	17240 KB	Output is correct
37	Correct	6 ms	17244 KB	Output is correct
38	Correct	6 ms	17244 KB	Output is correct
39	Correct	5 ms	16988 KB	Output is correct
40	Correct	5 ms	16988 KB	Output is correct
41	Correct	5 ms	17016 KB	Output is correct
42	Correct	6 ms	16988 KB	Output is correct
43	Correct	5 ms	16984 KB	Output is correct
44	Correct	5 ms	17112 KB	Output is correct
45	Correct	5 ms	16988 KB	Output is correct
46	Correct	7 ms	17136 KB	Output is correct
47	Correct	5 ms	16988 KB	Output is correct
48	Correct	5 ms	16988 KB	Output is correct
49	Correct	6 ms	16988 KB	Output is correct
50	Correct	6 ms	16988 KB	Output is correct
51	Correct	5 ms	16988 KB	Output is correct
52	Correct	6 ms	16988 KB	Output is correct
53	Correct	5 ms	16988 KB	Output is correct
54	Correct	6 ms	17208 KB	Output is correct

Subtask #3
25.0 / 25.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	3 ms	16732 KB	Output is correct
2	Correct	3 ms	16732 KB	Output is correct
3	Correct	227 ms	39604 KB	Output is correct
4	Correct	331 ms	50616 KB	Output is correct
5	Correct	187 ms	49800 KB	Output is correct
6	Correct	253 ms	41900 KB	Output is correct
7	Correct	255 ms	41256 KB	Output is correct
8	Correct	249 ms	40636 KB	Output is correct
9	Correct	262 ms	40900 KB	Output is correct
10	Correct	301 ms	50212 KB	Output is correct
11	Correct	237 ms	41920 KB	Output is correct
12	Correct	255 ms	43200 KB	Output is correct
13	Correct	219 ms	38384 KB	Output is correct
14	Correct	312 ms	42176 KB	Output is correct
15	Correct	285 ms	42092 KB	Output is correct
16	Correct	296 ms	50596 KB	Output is correct

Subtask #4
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	3 ms	16732 KB	Output is correct
2	Correct	3 ms	16732 KB	Output is correct
3	Correct	3 ms	16728 KB	Output is correct
4	Correct	3 ms	16728 KB	Output is correct
5	Correct	3 ms	16732 KB	Output is correct
6	Correct	3 ms	16732 KB	Output is correct
7	Correct	3 ms	16900 KB	Output is correct
8	Correct	3 ms	16732 KB	Output is correct
9	Correct	4 ms	16816 KB	Output is correct
10	Correct	3 ms	16732 KB	Output is correct
11	Correct	3 ms	16732 KB	Output is correct
12	Correct	4 ms	16732 KB	Output is correct
13	Correct	4 ms	16728 KB	Output is correct
14	Correct	3 ms	16732 KB	Output is correct
15	Correct	3 ms	16732 KB	Output is correct
16	Correct	3 ms	16732 KB	Output is correct
17	Correct	3 ms	16728 KB	Output is correct
18	Correct	3 ms	16732 KB	Output is correct
19	Correct	4 ms	16732 KB	Output is correct
20	Correct	3 ms	16732 KB	Output is correct
21	Correct	3 ms	16732 KB	Output is correct
22	Correct	4 ms	16732 KB	Output is correct
23	Correct	3 ms	16732 KB	Output is correct
24	Correct	4 ms	16732 KB	Output is correct
25	Correct	4 ms	16732 KB	Output is correct
26	Correct	3 ms	16728 KB	Output is correct
27	Correct	3 ms	16732 KB	Output is correct
28	Correct	3 ms	16732 KB	Output is correct
29	Correct	227 ms	39604 KB	Output is correct
30	Correct	331 ms	50616 KB	Output is correct
31	Correct	187 ms	49800 KB	Output is correct
32	Correct	253 ms	41900 KB	Output is correct
33	Correct	255 ms	41256 KB	Output is correct
34	Correct	249 ms	40636 KB	Output is correct
35	Correct	262 ms	40900 KB	Output is correct
36	Correct	301 ms	50212 KB	Output is correct
37	Correct	237 ms	41920 KB	Output is correct
38	Correct	255 ms	43200 KB	Output is correct
39	Correct	219 ms	38384 KB	Output is correct
40	Correct	312 ms	42176 KB	Output is correct
41	Correct	285 ms	42092 KB	Output is correct
42	Correct	296 ms	50596 KB	Output is correct
43	Correct	226 ms	42988 KB	Output is correct
44	Correct	330 ms	51380 KB	Output is correct
45	Correct	355 ms	51160 KB	Output is correct
46	Correct	251 ms	41652 KB	Output is correct
47	Correct	257 ms	42884 KB	Output is correct
48	Correct	268 ms	41656 KB	Output is correct
49	Correct	294 ms	51128 KB	Output is correct
50	Correct	238 ms	42076 KB	Output is correct
51	Correct	248 ms	42804 KB	Output is correct
52	Correct	259 ms	49592 KB	Output is correct
53	Correct	227 ms	38464 KB	Output is correct
54	Correct	288 ms	41748 KB	Output is correct
55	Correct	317 ms	43416 KB	Output is correct
56	Correct	292 ms	51132 KB	Output is correct

Subtask #5
22.0 / 22.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	3 ms	16732 KB	Output is correct
2	Correct	3 ms	16732 KB	Output is correct
3	Correct	3 ms	16728 KB	Output is correct
4	Correct	3 ms	16728 KB	Output is correct
5	Correct	3 ms	16732 KB	Output is correct
6	Correct	3 ms	16732 KB	Output is correct
7	Correct	3 ms	16900 KB	Output is correct
8	Correct	3 ms	16732 KB	Output is correct
9	Correct	4 ms	16816 KB	Output is correct
10	Correct	3 ms	16732 KB	Output is correct
11	Correct	3 ms	16732 KB	Output is correct
12	Correct	4 ms	16732 KB	Output is correct
13	Correct	4 ms	16728 KB	Output is correct
14	Correct	3 ms	16732 KB	Output is correct
15	Correct	3 ms	16732 KB	Output is correct
16	Correct	3 ms	16732 KB	Output is correct
17	Correct	3 ms	16728 KB	Output is correct
18	Correct	3 ms	16732 KB	Output is correct
19	Correct	4 ms	16732 KB	Output is correct
20	Correct	3 ms	16732 KB	Output is correct
21	Correct	3 ms	16732 KB	Output is correct
22	Correct	4 ms	16732 KB	Output is correct
23	Correct	3 ms	16732 KB	Output is correct
24	Correct	4 ms	16732 KB	Output is correct
25	Correct	4 ms	16732 KB	Output is correct
26	Correct	3 ms	16728 KB	Output is correct
27	Correct	3 ms	16732 KB	Output is correct
28	Correct	3 ms	16732 KB	Output is correct
29	Correct	5 ms	16988 KB	Output is correct
30	Correct	7 ms	17480 KB	Output is correct
31	Correct	5 ms	16984 KB	Output is correct
32	Correct	5 ms	16988 KB	Output is correct
33	Correct	5 ms	16988 KB	Output is correct
34	Correct	5 ms	16988 KB	Output is correct
35	Correct	7 ms	16988 KB	Output is correct
36	Correct	6 ms	17240 KB	Output is correct
37	Correct	6 ms	17244 KB	Output is correct
38	Correct	6 ms	17244 KB	Output is correct
39	Correct	5 ms	16988 KB	Output is correct
40	Correct	5 ms	16988 KB	Output is correct
41	Correct	5 ms	17016 KB	Output is correct
42	Correct	6 ms	16988 KB	Output is correct
43	Correct	5 ms	16984 KB	Output is correct
44	Correct	5 ms	17112 KB	Output is correct
45	Correct	5 ms	16988 KB	Output is correct
46	Correct	7 ms	17136 KB	Output is correct
47	Correct	5 ms	16988 KB	Output is correct
48	Correct	5 ms	16988 KB	Output is correct
49	Correct	6 ms	16988 KB	Output is correct
50	Correct	6 ms	16988 KB	Output is correct
51	Correct	5 ms	16988 KB	Output is correct
52	Correct	6 ms	16988 KB	Output is correct
53	Correct	5 ms	16988 KB	Output is correct
54	Correct	6 ms	17208 KB	Output is correct
55	Correct	205 ms	39352 KB	Output is correct
56	Correct	306 ms	50048 KB	Output is correct
57	Correct	193 ms	50536 KB	Output is correct
58	Correct	227 ms	41580 KB	Output is correct
59	Correct	250 ms	41916 KB	Output is correct
60	Correct	265 ms	41916 KB	Output is correct
61	Correct	212 ms	40636 KB	Output is correct
62	Correct	241 ms	41912 KB	Output is correct
63	Correct	218 ms	41144 KB	Output is correct
64	Correct	252 ms	42432 KB	Output is correct
65	Correct	263 ms	41660 KB	Output is correct

Subtask #6
29.0 / 29.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	3 ms	16732 KB	Output is correct
2	Correct	3 ms	16732 KB	Output is correct
3	Correct	3 ms	16728 KB	Output is correct
4	Correct	3 ms	16728 KB	Output is correct
5	Correct	3 ms	16732 KB	Output is correct
6	Correct	3 ms	16732 KB	Output is correct
7	Correct	3 ms	16900 KB	Output is correct
8	Correct	3 ms	16732 KB	Output is correct
9	Correct	4 ms	16816 KB	Output is correct
10	Correct	3 ms	16732 KB	Output is correct
11	Correct	3 ms	16732 KB	Output is correct
12	Correct	4 ms	16732 KB	Output is correct
13	Correct	4 ms	16728 KB	Output is correct
14	Correct	3 ms	16732 KB	Output is correct
15	Correct	3 ms	16732 KB	Output is correct
16	Correct	3 ms	16732 KB	Output is correct
17	Correct	3 ms	16728 KB	Output is correct
18	Correct	3 ms	16732 KB	Output is correct
19	Correct	4 ms	16732 KB	Output is correct
20	Correct	3 ms	16732 KB	Output is correct
21	Correct	3 ms	16732 KB	Output is correct
22	Correct	4 ms	16732 KB	Output is correct
23	Correct	3 ms	16732 KB	Output is correct
24	Correct	4 ms	16732 KB	Output is correct
25	Correct	4 ms	16732 KB	Output is correct
26	Correct	3 ms	16728 KB	Output is correct
27	Correct	3 ms	16732 KB	Output is correct
28	Correct	3 ms	16732 KB	Output is correct
29	Correct	5 ms	16988 KB	Output is correct
30	Correct	7 ms	17480 KB	Output is correct
31	Correct	5 ms	16984 KB	Output is correct
32	Correct	5 ms	16988 KB	Output is correct
33	Correct	5 ms	16988 KB	Output is correct
34	Correct	5 ms	16988 KB	Output is correct
35	Correct	7 ms	16988 KB	Output is correct
36	Correct	6 ms	17240 KB	Output is correct
37	Correct	6 ms	17244 KB	Output is correct
38	Correct	6 ms	17244 KB	Output is correct
39	Correct	5 ms	16988 KB	Output is correct
40	Correct	5 ms	16988 KB	Output is correct
41	Correct	5 ms	17016 KB	Output is correct
42	Correct	6 ms	16988 KB	Output is correct
43	Correct	5 ms	16984 KB	Output is correct
44	Correct	5 ms	17112 KB	Output is correct
45	Correct	5 ms	16988 KB	Output is correct
46	Correct	7 ms	17136 KB	Output is correct
47	Correct	5 ms	16988 KB	Output is correct
48	Correct	5 ms	16988 KB	Output is correct
49	Correct	6 ms	16988 KB	Output is correct
50	Correct	6 ms	16988 KB	Output is correct
51	Correct	5 ms	16988 KB	Output is correct
52	Correct	6 ms	16988 KB	Output is correct
53	Correct	5 ms	16988 KB	Output is correct
54	Correct	6 ms	17208 KB	Output is correct
55	Correct	227 ms	39604 KB	Output is correct
56	Correct	331 ms	50616 KB	Output is correct
57	Correct	187 ms	49800 KB	Output is correct
58	Correct	253 ms	41900 KB	Output is correct
59	Correct	255 ms	41256 KB	Output is correct
60	Correct	249 ms	40636 KB	Output is correct
61	Correct	262 ms	40900 KB	Output is correct
62	Correct	301 ms	50212 KB	Output is correct
63	Correct	237 ms	41920 KB	Output is correct
64	Correct	255 ms	43200 KB	Output is correct
65	Correct	219 ms	38384 KB	Output is correct
66	Correct	312 ms	42176 KB	Output is correct
67	Correct	285 ms	42092 KB	Output is correct
68	Correct	296 ms	50596 KB	Output is correct
69	Correct	226 ms	42988 KB	Output is correct
70	Correct	330 ms	51380 KB	Output is correct
71	Correct	355 ms	51160 KB	Output is correct
72	Correct	251 ms	41652 KB	Output is correct
73	Correct	257 ms	42884 KB	Output is correct
74	Correct	268 ms	41656 KB	Output is correct
75	Correct	294 ms	51128 KB	Output is correct
76	Correct	238 ms	42076 KB	Output is correct
77	Correct	248 ms	42804 KB	Output is correct
78	Correct	259 ms	49592 KB	Output is correct
79	Correct	227 ms	38464 KB	Output is correct
80	Correct	288 ms	41748 KB	Output is correct
81	Correct	317 ms	43416 KB	Output is correct
82	Correct	292 ms	51132 KB	Output is correct
83	Correct	205 ms	39352 KB	Output is correct
84	Correct	306 ms	50048 KB	Output is correct
85	Correct	193 ms	50536 KB	Output is correct
86	Correct	227 ms	41580 KB	Output is correct
87	Correct	250 ms	41916 KB	Output is correct
88	Correct	265 ms	41916 KB	Output is correct
89	Correct	212 ms	40636 KB	Output is correct
90	Correct	241 ms	41912 KB	Output is correct
91	Correct	218 ms	41144 KB	Output is correct
92	Correct	252 ms	42432 KB	Output is correct
93	Correct	263 ms	41660 KB	Output is correct
94	Correct	229 ms	42932 KB	Output is correct
95	Correct	263 ms	49840 KB	Output is correct
96	Correct	193 ms	49852 KB	Output is correct
97	Correct	258 ms	42216 KB	Output is correct
98	Correct	286 ms	42512 KB	Output is correct
99	Correct	257 ms	42416 KB	Output is correct
100	Correct	297 ms	50352 KB	Output is correct
101	Correct	233 ms	42428 KB	Output is correct
102	Correct	255 ms	43188 KB	Output is correct
103	Correct	289 ms	50876 KB	Output is correct
104	Correct	250 ms	41140 KB	Output is correct
105	Correct	285 ms	42964 KB	Output is correct
106	Correct	302 ms	44320 KB	Output is correct
107	Correct	328 ms	50796 KB	Output is correct
108	Correct	228 ms	42672 KB	Output is correct
109	Correct	236 ms	43712 KB	Output is correct
110	Correct	228 ms	42932 KB	Output is correct
111	Correct	230 ms	42032 KB	Output is correct
112	Correct	236 ms	43588 KB	Output is correct
113	Correct	229 ms	42032 KB	Output is correct
114	Correct	227 ms	43032 KB	Output is correct
115	Correct	229 ms	41904 KB	Output is correct
116	Correct	230 ms	42820 KB	Output is correct

Submission #936011

Compilation message

Subtask #1 6.0 / 6.0

Subtask #2 8.0 / 8.0

Subtask #3 25.0 / 25.0

Subtask #4 10.0 / 10.0

Subtask #5 22.0 / 22.0

Subtask #6 29.0 / 29.0

Subtask #1
6.0 / 6.0

Subtask #2
8.0 / 8.0

Subtask #3
25.0 / 25.0

Subtask #4
10.0 / 10.0

Subtask #5
22.0 / 22.0

Subtask #6
29.0 / 29.0