답안 #885537

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
885537	2023-12-10T02:47:20 Z	huutuan	Joker (BOI20_joker)	C++14	100 / 100	425 ms	35900 KB

Joker

#include<bits/stdc++.h>
#define taskname "nohome"

using namespace std;

struct DSU{
   vector<int> lab, val;
   bool ans=1;
   vector<vector<pair<int, int>>> changes;
   void init(int n){
      lab.assign(n+1, -1);
      val.assign(n+1, 0);
   }
   pair<int, int> find_set(int u){
      if (lab[u]<0) return {u, 0};
      auto p=find_set(lab[u]);
      return {p.first, val[u]^p.second};
   }
   void union_sets(int u, int v){
      if (!u || !v) return;
      auto pu=find_set(u), pv=find_set(v);
      if (pu.first!=pv.first){
         if (lab[pu.first]>lab[pv.first]) swap(pu, pv), swap(u, v);
         changes.push_back({{pu.first, lab[pu.first]}, {pv.first, lab[pv.first]}, {pu.first, val[pu.first]}, {pv.first, val[pv.first]}});
         lab[pu.first]+=lab[pv.first];
         val[pu.first]=0;
         lab[pv.first]=pu.first;
         val[pv.first]=pu.second^pv.second^1;
      }else changes.push_back({{ans, -1}}), ans&=pu.second^pv.second;
   }
   void rollback(int sz){
      while ((int)changes.size()>sz){
         if (changes.back().size()==1){
            ans=changes.back()[0].first;
         }else{
            for (int i=0; i<2; ++i) lab[changes.back()[i].first]=changes.back()[i].second;
            for (int i=2; i<4; ++i) val[changes.back()[i].first]=changes.back()[i].second;
         }
         changes.pop_back();
      }
   }
} dsu;

const int N=2e5+1;
int n, m, q, ans[N], mx[N];
pair<int, int> edge[N];

void dnc(int l, int r, int optl, int optr){
   if (l>r) return;
   int mid=(l+r)>>1;
   int sz=dsu.changes.size();
   int idx=optr;
   for (int i=l; i<mid; ++i) dsu.union_sets(edge[i].first, edge[i].second);
   int sz2=dsu.changes.size();
   while (dsu.ans && idx>=optl){
      dsu.union_sets(edge[idx].first, edge[idx].second);
      --idx;
   }
   mx[mid]=idx;
   dsu.rollback(sz2);
   dsu.union_sets(edge[mid].first, edge[mid].second);
   dnc(mid+1, r, idx, optr);
   dsu.rollback(sz);
   for (int i=idx+1; i<=optr; ++i) dsu.union_sets(edge[i].first, edge[i].second);
   dnc(l, mid-1, optl, idx);
   dsu.rollback(sz);
}

int32_t main(){
   ios_base::sync_with_stdio(false);
   cin.tie(nullptr);
   // freopen(taskname".inp", "r", stdin);
   // freopen(taskname".out", "w", stdout);
   cin >> n >> m >> q;
   for (int i=1; i<=m; ++i){
      int x, y; cin >> x >> y;
      edge[i]={x, y};
   }
   dsu.init(n);
   dnc(1, m, 0, m);
   for (int i=1; i<=q; ++i){
      int l, r; cin >> l >> r;
      cout << (mx[l]>=r?"YES\n":"NO\n");
   }
   return 0;
}

Subtask #1
6.0 / 6.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	2396 KB	Output is correct
2	Correct	0 ms	2396 KB	Output is correct
3	Correct	0 ms	2512 KB	Output is correct
4	Correct	0 ms	2512 KB	Output is correct
5	Correct	0 ms	2396 KB	Output is correct
6	Correct	0 ms	2396 KB	Output is correct
7	Correct	1 ms	2396 KB	Output is correct
8	Correct	1 ms	2508 KB	Output is correct
9	Correct	1 ms	2396 KB	Output is correct
10	Correct	1 ms	2396 KB	Output is correct
11	Correct	1 ms	2648 KB	Output is correct
12	Correct	1 ms	2396 KB	Output is correct
13	Correct	1 ms	2396 KB	Output is correct
14	Correct	1 ms	2396 KB	Output is correct
15	Correct	1 ms	2396 KB	Output is correct
16	Correct	1 ms	2512 KB	Output is correct
17	Correct	1 ms	2396 KB	Output is correct
18	Correct	1 ms	2392 KB	Output is correct
19	Correct	1 ms	2396 KB	Output is correct
20	Correct	1 ms	2396 KB	Output is correct
21	Correct	1 ms	2396 KB	Output is correct
22	Correct	1 ms	2392 KB	Output is correct
23	Correct	1 ms	2392 KB	Output is correct
24	Correct	1 ms	2396 KB	Output is correct
25	Correct	1 ms	2396 KB	Output is correct
26	Correct	1 ms	2396 KB	Output is correct
27	Correct	1 ms	2396 KB	Output is correct
28	Correct	1 ms	2396 KB	Output is correct

Subtask #2
8.0 / 8.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	2396 KB	Output is correct
2	Correct	0 ms	2396 KB	Output is correct
3	Correct	0 ms	2512 KB	Output is correct
4	Correct	0 ms	2512 KB	Output is correct
5	Correct	0 ms	2396 KB	Output is correct
6	Correct	0 ms	2396 KB	Output is correct
7	Correct	1 ms	2396 KB	Output is correct
8	Correct	1 ms	2508 KB	Output is correct
9	Correct	1 ms	2396 KB	Output is correct
10	Correct	1 ms	2396 KB	Output is correct
11	Correct	1 ms	2648 KB	Output is correct
12	Correct	1 ms	2396 KB	Output is correct
13	Correct	1 ms	2396 KB	Output is correct
14	Correct	1 ms	2396 KB	Output is correct
15	Correct	1 ms	2396 KB	Output is correct
16	Correct	1 ms	2512 KB	Output is correct
17	Correct	1 ms	2396 KB	Output is correct
18	Correct	1 ms	2392 KB	Output is correct
19	Correct	1 ms	2396 KB	Output is correct
20	Correct	1 ms	2396 KB	Output is correct
21	Correct	1 ms	2396 KB	Output is correct
22	Correct	1 ms	2392 KB	Output is correct
23	Correct	1 ms	2392 KB	Output is correct
24	Correct	1 ms	2396 KB	Output is correct
25	Correct	1 ms	2396 KB	Output is correct
26	Correct	1 ms	2396 KB	Output is correct
27	Correct	1 ms	2396 KB	Output is correct
28	Correct	1 ms	2396 KB	Output is correct
29	Correct	2 ms	2652 KB	Output is correct
30	Correct	2 ms	2652 KB	Output is correct
31	Correct	2 ms	2652 KB	Output is correct
32	Correct	2 ms	2652 KB	Output is correct
33	Correct	2 ms	2648 KB	Output is correct
34	Correct	3 ms	2808 KB	Output is correct
35	Correct	2 ms	2652 KB	Output is correct
36	Correct	2 ms	2652 KB	Output is correct
37	Correct	2 ms	2652 KB	Output is correct
38	Correct	3 ms	2656 KB	Output is correct
39	Correct	2 ms	2904 KB	Output is correct
40	Correct	2 ms	2648 KB	Output is correct
41	Correct	2 ms	2652 KB	Output is correct
42	Correct	2 ms	2652 KB	Output is correct
43	Correct	2 ms	2652 KB	Output is correct
44	Correct	2 ms	2652 KB	Output is correct
45	Correct	2 ms	2652 KB	Output is correct
46	Correct	2 ms	2652 KB	Output is correct
47	Correct	2 ms	2652 KB	Output is correct
48	Correct	2 ms	2704 KB	Output is correct
49	Correct	2 ms	2708 KB	Output is correct
50	Correct	2 ms	2652 KB	Output is correct
51	Correct	2 ms	2652 KB	Output is correct
52	Correct	2 ms	2640 KB	Output is correct
53	Correct	2 ms	2652 KB	Output is correct
54	Correct	2 ms	2652 KB	Output is correct

Subtask #3
25.0 / 25.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	2396 KB	Output is correct
2	Correct	0 ms	2396 KB	Output is correct
3	Correct	172 ms	20936 KB	Output is correct
4	Correct	406 ms	34936 KB	Output is correct
5	Correct	148 ms	22928 KB	Output is correct
6	Correct	156 ms	21492 KB	Output is correct
7	Correct	165 ms	21752 KB	Output is correct
8	Correct	185 ms	20112 KB	Output is correct
9	Correct	203 ms	21532 KB	Output is correct
10	Correct	251 ms	23548 KB	Output is correct
11	Correct	209 ms	20868 KB	Output is correct
12	Correct	214 ms	23644 KB	Output is correct
13	Correct	190 ms	18576 KB	Output is correct
14	Correct	177 ms	20028 KB	Output is correct
15	Correct	244 ms	22284 KB	Output is correct
16	Correct	257 ms	22612 KB	Output is correct

Subtask #4
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	2396 KB	Output is correct
2	Correct	0 ms	2396 KB	Output is correct
3	Correct	0 ms	2512 KB	Output is correct
4	Correct	0 ms	2512 KB	Output is correct
5	Correct	0 ms	2396 KB	Output is correct
6	Correct	0 ms	2396 KB	Output is correct
7	Correct	1 ms	2396 KB	Output is correct
8	Correct	1 ms	2508 KB	Output is correct
9	Correct	1 ms	2396 KB	Output is correct
10	Correct	1 ms	2396 KB	Output is correct
11	Correct	1 ms	2648 KB	Output is correct
12	Correct	1 ms	2396 KB	Output is correct
13	Correct	1 ms	2396 KB	Output is correct
14	Correct	1 ms	2396 KB	Output is correct
15	Correct	1 ms	2396 KB	Output is correct
16	Correct	1 ms	2512 KB	Output is correct
17	Correct	1 ms	2396 KB	Output is correct
18	Correct	1 ms	2392 KB	Output is correct
19	Correct	1 ms	2396 KB	Output is correct
20	Correct	1 ms	2396 KB	Output is correct
21	Correct	1 ms	2396 KB	Output is correct
22	Correct	1 ms	2392 KB	Output is correct
23	Correct	1 ms	2392 KB	Output is correct
24	Correct	1 ms	2396 KB	Output is correct
25	Correct	1 ms	2396 KB	Output is correct
26	Correct	1 ms	2396 KB	Output is correct
27	Correct	1 ms	2396 KB	Output is correct
28	Correct	1 ms	2396 KB	Output is correct
29	Correct	172 ms	20936 KB	Output is correct
30	Correct	406 ms	34936 KB	Output is correct
31	Correct	148 ms	22928 KB	Output is correct
32	Correct	156 ms	21492 KB	Output is correct
33	Correct	165 ms	21752 KB	Output is correct
34	Correct	185 ms	20112 KB	Output is correct
35	Correct	203 ms	21532 KB	Output is correct
36	Correct	251 ms	23548 KB	Output is correct
37	Correct	209 ms	20868 KB	Output is correct
38	Correct	214 ms	23644 KB	Output is correct
39	Correct	190 ms	18576 KB	Output is correct
40	Correct	177 ms	20028 KB	Output is correct
41	Correct	244 ms	22284 KB	Output is correct
42	Correct	257 ms	22612 KB	Output is correct
43	Correct	177 ms	21772 KB	Output is correct
44	Correct	425 ms	35900 KB	Output is correct
45	Correct	261 ms	23544 KB	Output is correct
46	Correct	170 ms	22056 KB	Output is correct
47	Correct	166 ms	20988 KB	Output is correct
48	Correct	212 ms	20472 KB	Output is correct
49	Correct	267 ms	22904 KB	Output is correct
50	Correct	200 ms	20472 KB	Output is correct
51	Correct	216 ms	23016 KB	Output is correct
52	Correct	228 ms	24056 KB	Output is correct
53	Correct	190 ms	20216 KB	Output is correct
54	Correct	220 ms	20884 KB	Output is correct
55	Correct	243 ms	22580 KB	Output is correct
56	Correct	264 ms	23952 KB	Output is correct

Subtask #5
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	2396 KB	Output is correct
2	Correct	0 ms	2396 KB	Output is correct
3	Correct	0 ms	2512 KB	Output is correct
4	Correct	0 ms	2512 KB	Output is correct
5	Correct	0 ms	2396 KB	Output is correct
6	Correct	0 ms	2396 KB	Output is correct
7	Correct	1 ms	2396 KB	Output is correct
8	Correct	1 ms	2508 KB	Output is correct
9	Correct	1 ms	2396 KB	Output is correct
10	Correct	1 ms	2396 KB	Output is correct
11	Correct	1 ms	2648 KB	Output is correct
12	Correct	1 ms	2396 KB	Output is correct
13	Correct	1 ms	2396 KB	Output is correct
14	Correct	1 ms	2396 KB	Output is correct
15	Correct	1 ms	2396 KB	Output is correct
16	Correct	1 ms	2512 KB	Output is correct
17	Correct	1 ms	2396 KB	Output is correct
18	Correct	1 ms	2392 KB	Output is correct
19	Correct	1 ms	2396 KB	Output is correct
20	Correct	1 ms	2396 KB	Output is correct
21	Correct	1 ms	2396 KB	Output is correct
22	Correct	1 ms	2392 KB	Output is correct
23	Correct	1 ms	2392 KB	Output is correct
24	Correct	1 ms	2396 KB	Output is correct
25	Correct	1 ms	2396 KB	Output is correct
26	Correct	1 ms	2396 KB	Output is correct
27	Correct	1 ms	2396 KB	Output is correct
28	Correct	1 ms	2396 KB	Output is correct
29	Correct	2 ms	2652 KB	Output is correct
30	Correct	2 ms	2652 KB	Output is correct
31	Correct	2 ms	2652 KB	Output is correct
32	Correct	2 ms	2652 KB	Output is correct
33	Correct	2 ms	2648 KB	Output is correct
34	Correct	3 ms	2808 KB	Output is correct
35	Correct	2 ms	2652 KB	Output is correct
36	Correct	2 ms	2652 KB	Output is correct
37	Correct	2 ms	2652 KB	Output is correct
38	Correct	3 ms	2656 KB	Output is correct
39	Correct	2 ms	2904 KB	Output is correct
40	Correct	2 ms	2648 KB	Output is correct
41	Correct	2 ms	2652 KB	Output is correct
42	Correct	2 ms	2652 KB	Output is correct
43	Correct	2 ms	2652 KB	Output is correct
44	Correct	2 ms	2652 KB	Output is correct
45	Correct	2 ms	2652 KB	Output is correct
46	Correct	2 ms	2652 KB	Output is correct
47	Correct	2 ms	2652 KB	Output is correct
48	Correct	2 ms	2704 KB	Output is correct
49	Correct	2 ms	2708 KB	Output is correct
50	Correct	2 ms	2652 KB	Output is correct
51	Correct	2 ms	2652 KB	Output is correct
52	Correct	2 ms	2640 KB	Output is correct
53	Correct	2 ms	2652 KB	Output is correct
54	Correct	2 ms	2652 KB	Output is correct
55	Correct	153 ms	18940 KB	Output is correct
56	Correct	356 ms	32748 KB	Output is correct
57	Correct	117 ms	21228 KB	Output is correct
58	Correct	136 ms	19216 KB	Output is correct
59	Correct	189 ms	18688 KB	Output is correct
60	Correct	234 ms	20092 KB	Output is correct
61	Correct	202 ms	18972 KB	Output is correct
62	Correct	195 ms	21132 KB	Output is correct
63	Correct	154 ms	17900 KB	Output is correct
64	Correct	203 ms	19964 KB	Output is correct
65	Correct	260 ms	20228 KB	Output is correct

Subtask #6
29.0 / 29.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	2396 KB	Output is correct
2	Correct	0 ms	2396 KB	Output is correct
3	Correct	0 ms	2512 KB	Output is correct
4	Correct	0 ms	2512 KB	Output is correct
5	Correct	0 ms	2396 KB	Output is correct
6	Correct	0 ms	2396 KB	Output is correct
7	Correct	1 ms	2396 KB	Output is correct
8	Correct	1 ms	2508 KB	Output is correct
9	Correct	1 ms	2396 KB	Output is correct
10	Correct	1 ms	2396 KB	Output is correct
11	Correct	1 ms	2648 KB	Output is correct
12	Correct	1 ms	2396 KB	Output is correct
13	Correct	1 ms	2396 KB	Output is correct
14	Correct	1 ms	2396 KB	Output is correct
15	Correct	1 ms	2396 KB	Output is correct
16	Correct	1 ms	2512 KB	Output is correct
17	Correct	1 ms	2396 KB	Output is correct
18	Correct	1 ms	2392 KB	Output is correct
19	Correct	1 ms	2396 KB	Output is correct
20	Correct	1 ms	2396 KB	Output is correct
21	Correct	1 ms	2396 KB	Output is correct
22	Correct	1 ms	2392 KB	Output is correct
23	Correct	1 ms	2392 KB	Output is correct
24	Correct	1 ms	2396 KB	Output is correct
25	Correct	1 ms	2396 KB	Output is correct
26	Correct	1 ms	2396 KB	Output is correct
27	Correct	1 ms	2396 KB	Output is correct
28	Correct	1 ms	2396 KB	Output is correct
29	Correct	2 ms	2652 KB	Output is correct
30	Correct	2 ms	2652 KB	Output is correct
31	Correct	2 ms	2652 KB	Output is correct
32	Correct	2 ms	2652 KB	Output is correct
33	Correct	2 ms	2648 KB	Output is correct
34	Correct	3 ms	2808 KB	Output is correct
35	Correct	2 ms	2652 KB	Output is correct
36	Correct	2 ms	2652 KB	Output is correct
37	Correct	2 ms	2652 KB	Output is correct
38	Correct	3 ms	2656 KB	Output is correct
39	Correct	2 ms	2904 KB	Output is correct
40	Correct	2 ms	2648 KB	Output is correct
41	Correct	2 ms	2652 KB	Output is correct
42	Correct	2 ms	2652 KB	Output is correct
43	Correct	2 ms	2652 KB	Output is correct
44	Correct	2 ms	2652 KB	Output is correct
45	Correct	2 ms	2652 KB	Output is correct
46	Correct	2 ms	2652 KB	Output is correct
47	Correct	2 ms	2652 KB	Output is correct
48	Correct	2 ms	2704 KB	Output is correct
49	Correct	2 ms	2708 KB	Output is correct
50	Correct	2 ms	2652 KB	Output is correct
51	Correct	2 ms	2652 KB	Output is correct
52	Correct	2 ms	2640 KB	Output is correct
53	Correct	2 ms	2652 KB	Output is correct
54	Correct	2 ms	2652 KB	Output is correct
55	Correct	172 ms	20936 KB	Output is correct
56	Correct	406 ms	34936 KB	Output is correct
57	Correct	148 ms	22928 KB	Output is correct
58	Correct	156 ms	21492 KB	Output is correct
59	Correct	165 ms	21752 KB	Output is correct
60	Correct	185 ms	20112 KB	Output is correct
61	Correct	203 ms	21532 KB	Output is correct
62	Correct	251 ms	23548 KB	Output is correct
63	Correct	209 ms	20868 KB	Output is correct
64	Correct	214 ms	23644 KB	Output is correct
65	Correct	190 ms	18576 KB	Output is correct
66	Correct	177 ms	20028 KB	Output is correct
67	Correct	244 ms	22284 KB	Output is correct
68	Correct	257 ms	22612 KB	Output is correct
69	Correct	177 ms	21772 KB	Output is correct
70	Correct	425 ms	35900 KB	Output is correct
71	Correct	261 ms	23544 KB	Output is correct
72	Correct	170 ms	22056 KB	Output is correct
73	Correct	166 ms	20988 KB	Output is correct
74	Correct	212 ms	20472 KB	Output is correct
75	Correct	267 ms	22904 KB	Output is correct
76	Correct	200 ms	20472 KB	Output is correct
77	Correct	216 ms	23016 KB	Output is correct
78	Correct	228 ms	24056 KB	Output is correct
79	Correct	190 ms	20216 KB	Output is correct
80	Correct	220 ms	20884 KB	Output is correct
81	Correct	243 ms	22580 KB	Output is correct
82	Correct	264 ms	23952 KB	Output is correct
83	Correct	153 ms	18940 KB	Output is correct
84	Correct	356 ms	32748 KB	Output is correct
85	Correct	117 ms	21228 KB	Output is correct
86	Correct	136 ms	19216 KB	Output is correct
87	Correct	189 ms	18688 KB	Output is correct
88	Correct	234 ms	20092 KB	Output is correct
89	Correct	202 ms	18972 KB	Output is correct
90	Correct	195 ms	21132 KB	Output is correct
91	Correct	154 ms	17900 KB	Output is correct
92	Correct	203 ms	19964 KB	Output is correct
93	Correct	260 ms	20228 KB	Output is correct
94	Correct	185 ms	22740 KB	Output is correct
95	Correct	211 ms	23964 KB	Output is correct
96	Correct	145 ms	24832 KB	Output is correct
97	Correct	172 ms	22104 KB	Output is correct
98	Correct	173 ms	22012 KB	Output is correct
99	Correct	201 ms	21964 KB	Output is correct
100	Correct	249 ms	23688 KB	Output is correct
101	Correct	203 ms	21244 KB	Output is correct
102	Correct	237 ms	22560 KB	Output is correct
103	Correct	273 ms	24008 KB	Output is correct
104	Correct	190 ms	20752 KB	Output is correct
105	Correct	236 ms	23028 KB	Output is correct
106	Correct	263 ms	23772 KB	Output is correct
107	Correct	140 ms	25728 KB	Output is correct
108	Correct	180 ms	22160 KB	Output is correct
109	Correct	178 ms	22108 KB	Output is correct
110	Correct	173 ms	21496 KB	Output is correct
111	Correct	172 ms	21724 KB	Output is correct
112	Correct	194 ms	22868 KB	Output is correct
113	Correct	176 ms	21548 KB	Output is correct
114	Correct	173 ms	22812 KB	Output is correct
115	Correct	184 ms	21496 KB	Output is correct
116	Correct	180 ms	21664 KB	Output is correct

답안 #885537

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