Submission #561837

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
561837	2022-05-13T15:54:41 Z	Sohsoh84	Joker (BOI20_joker)	C++17	100 / 100	316 ms	18260 KB

Joker

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<int, int> pll;

#define all(x)			(x).begin(),(x).end()
#define X			first
#define Y			second
#define sep			' '
#define endl			'\n'
#define debug(x)		cerr << #x << ": " <<  x << endl;

const ll MAXN = 1e6 + 10;

int C[MAXN], par[MAXN], sz[MAXN], opt[MAXN], n, m, q, shit;
stack<pll> hist;
pll E[MAXN];
bool flag;

pll find(int v) {
	if (v == par[v]) return {v, 0};
	pll ans = find(par[v]);
	ans.Y ^= C[v];
	return ans;
}

inline int unite(int ind) {
	int u = E[ind].X, v = E[ind].Y;
	int cu, cv;
	tie(u, cu) = find(u);
	tie(v, cv) = find(v);

	if (v == u) {
		if (cv != cu) {
			hist.push({-2, -2});
			return 2;
		} else { 
			hist.push({-1, -1});
			shit++;
			return 1;
		}
	}

	if (sz[u] < sz[v]) swap(v, u);
	par[v] = u;
	sz[u] += sz[v];
	C[v] = cv ^ cu ^ 1;
	hist.push({v, u});
	return 0;
}

inline void rollback(int cnt) {
	while (cnt > 0 && !hist.empty()) {
		int v = hist.top().X, u = hist.top().Y;
		cnt--;
	
		hist.pop();
		if (v == -1) shit--;
		if (v < 0) continue;
		
		par[v] = v;
		sz[u] -= sz[v];
		C[v] = 0;
	}
}

void solve(int l = 1, int r = m, int optl = 0, int optr = m + 1) {
	if (r < l) return;
	int mid = (l + r) >> 1;

	for (int i = l; i < mid; i++)
		unite(i);

	// min, max -> opt
	
	if (shit) opt[mid] = optr; // +1 ? fd 
	else {
		opt[mid] = optr;
		while (opt[mid] >= optl) {
			if (unite(opt[mid]) == 1) {
				rollback(1);
				break;
			}

			opt[mid]--;
		}

		if (opt[mid] < optl) flag = true;
	}

	rollback(optr - opt[mid]);
	unite(mid);
	solve(mid + 1, r, opt[mid], optr);
	
	rollback(mid - l + 1);
	for (int i = opt[mid] + 1; i <= optr; i++)
		unite(i);
	
	solve(l, mid - 1, optl, opt[mid]);
	rollback(optr - opt[mid]);
}

int main() {
	ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);	
	cin >> n >> m >> q;
	for (int i = 0; i < MAXN; i++) {
		par[i] = i;
		sz[i] = 1;
	}

	for (int i = 1; i <= m; i++)
		cin >> E[i].X >> E[i].Y;

	E[m + 1] = {MAXN - 1, MAXN - 2};
	solve();

	while (q--) {
		int l, r;
		cin >> l >> r;
		cout << (flag || r >= opt[l] ? "NO" : "YES") << endl;
	}
	return 0;
}

Subtask #1
6.0 / 6.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	4 ms	8148 KB	Output is correct
2	Correct	5 ms	8148 KB	Output is correct
3	Correct	6 ms	8148 KB	Output is correct
4	Correct	4 ms	8148 KB	Output is correct
5	Correct	5 ms	8148 KB	Output is correct
6	Correct	4 ms	8148 KB	Output is correct
7	Correct	4 ms	8144 KB	Output is correct
8	Correct	4 ms	8148 KB	Output is correct
9	Correct	4 ms	8148 KB	Output is correct
10	Correct	4 ms	8148 KB	Output is correct
11	Correct	4 ms	8148 KB	Output is correct
12	Correct	5 ms	8148 KB	Output is correct
13	Correct	5 ms	8148 KB	Output is correct
14	Correct	4 ms	8148 KB	Output is correct
15	Correct	5 ms	8104 KB	Output is correct
16	Correct	5 ms	8144 KB	Output is correct
17	Correct	4 ms	8148 KB	Output is correct
18	Correct	5 ms	8148 KB	Output is correct
19	Correct	5 ms	8148 KB	Output is correct
20	Correct	6 ms	8152 KB	Output is correct
21	Correct	4 ms	8148 KB	Output is correct
22	Correct	6 ms	8148 KB	Output is correct
23	Correct	4 ms	8148 KB	Output is correct
24	Correct	4 ms	8140 KB	Output is correct
25	Correct	4 ms	8148 KB	Output is correct
26	Correct	5 ms	8076 KB	Output is correct
27	Correct	5 ms	8148 KB	Output is correct
28	Correct	6 ms	8148 KB	Output is correct

Subtask #2
8.0 / 8.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	4 ms	8148 KB	Output is correct
2	Correct	5 ms	8148 KB	Output is correct
3	Correct	6 ms	8148 KB	Output is correct
4	Correct	4 ms	8148 KB	Output is correct
5	Correct	5 ms	8148 KB	Output is correct
6	Correct	4 ms	8148 KB	Output is correct
7	Correct	4 ms	8144 KB	Output is correct
8	Correct	4 ms	8148 KB	Output is correct
9	Correct	4 ms	8148 KB	Output is correct
10	Correct	4 ms	8148 KB	Output is correct
11	Correct	4 ms	8148 KB	Output is correct
12	Correct	5 ms	8148 KB	Output is correct
13	Correct	5 ms	8148 KB	Output is correct
14	Correct	4 ms	8148 KB	Output is correct
15	Correct	5 ms	8104 KB	Output is correct
16	Correct	5 ms	8144 KB	Output is correct
17	Correct	4 ms	8148 KB	Output is correct
18	Correct	5 ms	8148 KB	Output is correct
19	Correct	5 ms	8148 KB	Output is correct
20	Correct	6 ms	8152 KB	Output is correct
21	Correct	4 ms	8148 KB	Output is correct
22	Correct	6 ms	8148 KB	Output is correct
23	Correct	4 ms	8148 KB	Output is correct
24	Correct	4 ms	8140 KB	Output is correct
25	Correct	4 ms	8148 KB	Output is correct
26	Correct	5 ms	8076 KB	Output is correct
27	Correct	5 ms	8148 KB	Output is correct
28	Correct	6 ms	8148 KB	Output is correct
29	Correct	11 ms	8168 KB	Output is correct
30	Correct	6 ms	8220 KB	Output is correct
31	Correct	7 ms	8160 KB	Output is correct
32	Correct	7 ms	8240 KB	Output is correct
33	Correct	6 ms	8148 KB	Output is correct
34	Correct	7 ms	8148 KB	Output is correct
35	Correct	7 ms	8148 KB	Output is correct
36	Correct	6 ms	8204 KB	Output is correct
37	Correct	6 ms	8264 KB	Output is correct
38	Correct	8 ms	8276 KB	Output is correct
39	Correct	6 ms	8148 KB	Output is correct
40	Correct	7 ms	8204 KB	Output is correct
41	Correct	5 ms	8148 KB	Output is correct
42	Correct	8 ms	8148 KB	Output is correct
43	Correct	6 ms	8260 KB	Output is correct
44	Correct	6 ms	8140 KB	Output is correct
45	Correct	6 ms	8260 KB	Output is correct
46	Correct	6 ms	8160 KB	Output is correct
47	Correct	7 ms	8160 KB	Output is correct
48	Correct	6 ms	8148 KB	Output is correct
49	Correct	6 ms	8148 KB	Output is correct
50	Correct	8 ms	8148 KB	Output is correct
51	Correct	8 ms	8252 KB	Output is correct
52	Correct	6 ms	8148 KB	Output is correct
53	Correct	6 ms	8148 KB	Output is correct
54	Correct	7 ms	8160 KB	Output is correct

Subtask #3
25.0 / 25.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	4 ms	8148 KB	Output is correct
2	Correct	5 ms	8148 KB	Output is correct
3	Correct	168 ms	16608 KB	Output is correct
4	Correct	273 ms	17468 KB	Output is correct
5	Correct	151 ms	17176 KB	Output is correct
6	Correct	211 ms	16556 KB	Output is correct
7	Correct	178 ms	16544 KB	Output is correct
8	Correct	194 ms	15816 KB	Output is correct
9	Correct	223 ms	16004 KB	Output is correct
10	Correct	273 ms	16684 KB	Output is correct
11	Correct	209 ms	16512 KB	Output is correct
12	Correct	220 ms	17000 KB	Output is correct
13	Correct	213 ms	16092 KB	Output is correct
14	Correct	205 ms	16384 KB	Output is correct
15	Correct	258 ms	16724 KB	Output is correct
16	Correct	289 ms	17028 KB	Output is correct

Subtask #4
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	4 ms	8148 KB	Output is correct
2	Correct	5 ms	8148 KB	Output is correct
3	Correct	6 ms	8148 KB	Output is correct
4	Correct	4 ms	8148 KB	Output is correct
5	Correct	5 ms	8148 KB	Output is correct
6	Correct	4 ms	8148 KB	Output is correct
7	Correct	4 ms	8144 KB	Output is correct
8	Correct	4 ms	8148 KB	Output is correct
9	Correct	4 ms	8148 KB	Output is correct
10	Correct	4 ms	8148 KB	Output is correct
11	Correct	4 ms	8148 KB	Output is correct
12	Correct	5 ms	8148 KB	Output is correct
13	Correct	5 ms	8148 KB	Output is correct
14	Correct	4 ms	8148 KB	Output is correct
15	Correct	5 ms	8104 KB	Output is correct
16	Correct	5 ms	8144 KB	Output is correct
17	Correct	4 ms	8148 KB	Output is correct
18	Correct	5 ms	8148 KB	Output is correct
19	Correct	5 ms	8148 KB	Output is correct
20	Correct	6 ms	8152 KB	Output is correct
21	Correct	4 ms	8148 KB	Output is correct
22	Correct	6 ms	8148 KB	Output is correct
23	Correct	4 ms	8148 KB	Output is correct
24	Correct	4 ms	8140 KB	Output is correct
25	Correct	4 ms	8148 KB	Output is correct
26	Correct	5 ms	8076 KB	Output is correct
27	Correct	5 ms	8148 KB	Output is correct
28	Correct	6 ms	8148 KB	Output is correct
29	Correct	168 ms	16608 KB	Output is correct
30	Correct	273 ms	17468 KB	Output is correct
31	Correct	151 ms	17176 KB	Output is correct
32	Correct	211 ms	16556 KB	Output is correct
33	Correct	178 ms	16544 KB	Output is correct
34	Correct	194 ms	15816 KB	Output is correct
35	Correct	223 ms	16004 KB	Output is correct
36	Correct	273 ms	16684 KB	Output is correct
37	Correct	209 ms	16512 KB	Output is correct
38	Correct	220 ms	17000 KB	Output is correct
39	Correct	213 ms	16092 KB	Output is correct
40	Correct	205 ms	16384 KB	Output is correct
41	Correct	258 ms	16724 KB	Output is correct
42	Correct	289 ms	17028 KB	Output is correct
43	Correct	172 ms	16800 KB	Output is correct
44	Correct	260 ms	17816 KB	Output is correct
45	Correct	235 ms	17248 KB	Output is correct
46	Correct	175 ms	16848 KB	Output is correct
47	Correct	199 ms	16928 KB	Output is correct
48	Correct	226 ms	16496 KB	Output is correct
49	Correct	284 ms	17224 KB	Output is correct
50	Correct	208 ms	16676 KB	Output is correct
51	Correct	220 ms	17072 KB	Output is correct
52	Correct	244 ms	17300 KB	Output is correct
53	Correct	197 ms	16368 KB	Output is correct
54	Correct	243 ms	16740 KB	Output is correct
55	Correct	256 ms	17124 KB	Output is correct
56	Correct	316 ms	17268 KB	Output is correct

Subtask #5
22.0 / 22.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	4 ms	8148 KB	Output is correct
2	Correct	5 ms	8148 KB	Output is correct
3	Correct	6 ms	8148 KB	Output is correct
4	Correct	4 ms	8148 KB	Output is correct
5	Correct	5 ms	8148 KB	Output is correct
6	Correct	4 ms	8148 KB	Output is correct
7	Correct	4 ms	8144 KB	Output is correct
8	Correct	4 ms	8148 KB	Output is correct
9	Correct	4 ms	8148 KB	Output is correct
10	Correct	4 ms	8148 KB	Output is correct
11	Correct	4 ms	8148 KB	Output is correct
12	Correct	5 ms	8148 KB	Output is correct
13	Correct	5 ms	8148 KB	Output is correct
14	Correct	4 ms	8148 KB	Output is correct
15	Correct	5 ms	8104 KB	Output is correct
16	Correct	5 ms	8144 KB	Output is correct
17	Correct	4 ms	8148 KB	Output is correct
18	Correct	5 ms	8148 KB	Output is correct
19	Correct	5 ms	8148 KB	Output is correct
20	Correct	6 ms	8152 KB	Output is correct
21	Correct	4 ms	8148 KB	Output is correct
22	Correct	6 ms	8148 KB	Output is correct
23	Correct	4 ms	8148 KB	Output is correct
24	Correct	4 ms	8140 KB	Output is correct
25	Correct	4 ms	8148 KB	Output is correct
26	Correct	5 ms	8076 KB	Output is correct
27	Correct	5 ms	8148 KB	Output is correct
28	Correct	6 ms	8148 KB	Output is correct
29	Correct	11 ms	8168 KB	Output is correct
30	Correct	6 ms	8220 KB	Output is correct
31	Correct	7 ms	8160 KB	Output is correct
32	Correct	7 ms	8240 KB	Output is correct
33	Correct	6 ms	8148 KB	Output is correct
34	Correct	7 ms	8148 KB	Output is correct
35	Correct	7 ms	8148 KB	Output is correct
36	Correct	6 ms	8204 KB	Output is correct
37	Correct	6 ms	8264 KB	Output is correct
38	Correct	8 ms	8276 KB	Output is correct
39	Correct	6 ms	8148 KB	Output is correct
40	Correct	7 ms	8204 KB	Output is correct
41	Correct	5 ms	8148 KB	Output is correct
42	Correct	8 ms	8148 KB	Output is correct
43	Correct	6 ms	8260 KB	Output is correct
44	Correct	6 ms	8140 KB	Output is correct
45	Correct	6 ms	8260 KB	Output is correct
46	Correct	6 ms	8160 KB	Output is correct
47	Correct	7 ms	8160 KB	Output is correct
48	Correct	6 ms	8148 KB	Output is correct
49	Correct	6 ms	8148 KB	Output is correct
50	Correct	8 ms	8148 KB	Output is correct
51	Correct	8 ms	8252 KB	Output is correct
52	Correct	6 ms	8148 KB	Output is correct
53	Correct	6 ms	8148 KB	Output is correct
54	Correct	7 ms	8160 KB	Output is correct
55	Correct	151 ms	14244 KB	Output is correct
56	Correct	267 ms	16456 KB	Output is correct
57	Correct	110 ms	14796 KB	Output is correct
58	Correct	139 ms	14284 KB	Output is correct
59	Correct	201 ms	14212 KB	Output is correct
60	Correct	229 ms	14660 KB	Output is correct
61	Correct	201 ms	14408 KB	Output is correct
62	Correct	187 ms	14760 KB	Output is correct
63	Correct	156 ms	13996 KB	Output is correct
64	Correct	221 ms	14392 KB	Output is correct
65	Correct	231 ms	14756 KB	Output is correct

Subtask #6
29.0 / 29.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	4 ms	8148 KB	Output is correct
2	Correct	5 ms	8148 KB	Output is correct
3	Correct	6 ms	8148 KB	Output is correct
4	Correct	4 ms	8148 KB	Output is correct
5	Correct	5 ms	8148 KB	Output is correct
6	Correct	4 ms	8148 KB	Output is correct
7	Correct	4 ms	8144 KB	Output is correct
8	Correct	4 ms	8148 KB	Output is correct
9	Correct	4 ms	8148 KB	Output is correct
10	Correct	4 ms	8148 KB	Output is correct
11	Correct	4 ms	8148 KB	Output is correct
12	Correct	5 ms	8148 KB	Output is correct
13	Correct	5 ms	8148 KB	Output is correct
14	Correct	4 ms	8148 KB	Output is correct
15	Correct	5 ms	8104 KB	Output is correct
16	Correct	5 ms	8144 KB	Output is correct
17	Correct	4 ms	8148 KB	Output is correct
18	Correct	5 ms	8148 KB	Output is correct
19	Correct	5 ms	8148 KB	Output is correct
20	Correct	6 ms	8152 KB	Output is correct
21	Correct	4 ms	8148 KB	Output is correct
22	Correct	6 ms	8148 KB	Output is correct
23	Correct	4 ms	8148 KB	Output is correct
24	Correct	4 ms	8140 KB	Output is correct
25	Correct	4 ms	8148 KB	Output is correct
26	Correct	5 ms	8076 KB	Output is correct
27	Correct	5 ms	8148 KB	Output is correct
28	Correct	6 ms	8148 KB	Output is correct
29	Correct	11 ms	8168 KB	Output is correct
30	Correct	6 ms	8220 KB	Output is correct
31	Correct	7 ms	8160 KB	Output is correct
32	Correct	7 ms	8240 KB	Output is correct
33	Correct	6 ms	8148 KB	Output is correct
34	Correct	7 ms	8148 KB	Output is correct
35	Correct	7 ms	8148 KB	Output is correct
36	Correct	6 ms	8204 KB	Output is correct
37	Correct	6 ms	8264 KB	Output is correct
38	Correct	8 ms	8276 KB	Output is correct
39	Correct	6 ms	8148 KB	Output is correct
40	Correct	7 ms	8204 KB	Output is correct
41	Correct	5 ms	8148 KB	Output is correct
42	Correct	8 ms	8148 KB	Output is correct
43	Correct	6 ms	8260 KB	Output is correct
44	Correct	6 ms	8140 KB	Output is correct
45	Correct	6 ms	8260 KB	Output is correct
46	Correct	6 ms	8160 KB	Output is correct
47	Correct	7 ms	8160 KB	Output is correct
48	Correct	6 ms	8148 KB	Output is correct
49	Correct	6 ms	8148 KB	Output is correct
50	Correct	8 ms	8148 KB	Output is correct
51	Correct	8 ms	8252 KB	Output is correct
52	Correct	6 ms	8148 KB	Output is correct
53	Correct	6 ms	8148 KB	Output is correct
54	Correct	7 ms	8160 KB	Output is correct
55	Correct	168 ms	16608 KB	Output is correct
56	Correct	273 ms	17468 KB	Output is correct
57	Correct	151 ms	17176 KB	Output is correct
58	Correct	211 ms	16556 KB	Output is correct
59	Correct	178 ms	16544 KB	Output is correct
60	Correct	194 ms	15816 KB	Output is correct
61	Correct	223 ms	16004 KB	Output is correct
62	Correct	273 ms	16684 KB	Output is correct
63	Correct	209 ms	16512 KB	Output is correct
64	Correct	220 ms	17000 KB	Output is correct
65	Correct	213 ms	16092 KB	Output is correct
66	Correct	205 ms	16384 KB	Output is correct
67	Correct	258 ms	16724 KB	Output is correct
68	Correct	289 ms	17028 KB	Output is correct
69	Correct	172 ms	16800 KB	Output is correct
70	Correct	260 ms	17816 KB	Output is correct
71	Correct	235 ms	17248 KB	Output is correct
72	Correct	175 ms	16848 KB	Output is correct
73	Correct	199 ms	16928 KB	Output is correct
74	Correct	226 ms	16496 KB	Output is correct
75	Correct	284 ms	17224 KB	Output is correct
76	Correct	208 ms	16676 KB	Output is correct
77	Correct	220 ms	17072 KB	Output is correct
78	Correct	244 ms	17300 KB	Output is correct
79	Correct	197 ms	16368 KB	Output is correct
80	Correct	243 ms	16740 KB	Output is correct
81	Correct	256 ms	17124 KB	Output is correct
82	Correct	316 ms	17268 KB	Output is correct
83	Correct	151 ms	14244 KB	Output is correct
84	Correct	267 ms	16456 KB	Output is correct
85	Correct	110 ms	14796 KB	Output is correct
86	Correct	139 ms	14284 KB	Output is correct
87	Correct	201 ms	14212 KB	Output is correct
88	Correct	229 ms	14660 KB	Output is correct
89	Correct	201 ms	14408 KB	Output is correct
90	Correct	187 ms	14760 KB	Output is correct
91	Correct	156 ms	13996 KB	Output is correct
92	Correct	221 ms	14392 KB	Output is correct
93	Correct	231 ms	14756 KB	Output is correct
94	Correct	184 ms	17656 KB	Output is correct
95	Correct	230 ms	17948 KB	Output is correct
96	Correct	159 ms	17952 KB	Output is correct
97	Correct	220 ms	17504 KB	Output is correct
98	Correct	207 ms	17536 KB	Output is correct
99	Correct	232 ms	17348 KB	Output is correct
100	Correct	254 ms	18224 KB	Output is correct
101	Correct	206 ms	17448 KB	Output is correct
102	Correct	246 ms	17780 KB	Output is correct
103	Correct	251 ms	18080 KB	Output is correct
104	Correct	220 ms	17248 KB	Output is correct
105	Correct	245 ms	17784 KB	Output is correct
106	Correct	301 ms	18004 KB	Output is correct
107	Correct	134 ms	18260 KB	Output is correct
108	Correct	180 ms	17384 KB	Output is correct
109	Correct	192 ms	17356 KB	Output is correct
110	Correct	186 ms	17396 KB	Output is correct
111	Correct	189 ms	17280 KB	Output is correct
112	Correct	184 ms	17292 KB	Output is correct
113	Correct	215 ms	17420 KB	Output is correct
114	Correct	172 ms	17276 KB	Output is correct
115	Correct	204 ms	17288 KB	Output is correct
116	Correct	185 ms	17324 KB	Output is correct

Submission #561837

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