답안 #439549

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
439549	2021-06-30T08:35:03 Z	soroush	Joker (BOI20_joker)	C++17	100 / 100	348 ms	13368 KB

Joker

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair<int , int> pii;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

const int maxn = 4e5+10;
const ll mod = 1e9+7;

#define pb push_back
#define endl '\n'
#define dokme(x) cout << x , exit(0)
#define ms(x , y) memset(x , y , sizeof x)
ll pw(ll a, ll b, ll md = mod){ll res = 1;while(b){if(b&1){res=(a*res)%md;}a=(a*a)%md;b>>=1;}return(res);}

int n, m, q;
int a[maxn], b[maxn], par[maxn] , mn[maxn];
vector < pii > und;

int getpar(int v){
	while(par[v] > 0)v = par[v];
	return v;
}

void merge(int u, int v){
	if((u = getpar(u)) == (v = getpar(v)))return;
	if(par[v] < par[u])swap(u , v);
	und.pb({v, par[v]});
	par[u] += par[v] , par[v] = u;
}

void undo(){
	auto [v , w] = und.back() ; und.pop_back();
	par[par[v]] -= w , par[v] =  w;
}

void solve(int l , int r , int ur){
	if(l > r)return;
	int mid = (l + r) >> 1 , cp = und.size();
	for(int i = max(1 , l) ; i <= mid ; i ++){
		merge(a[i] , b[i] + n);
		merge(b[i] , a[i] + n);
		if(getpar(a[i]) == getpar(b[i])){
			for(int j = mid ; j <= r ; j ++)
				mn[j] = ur;
			while(und.size() > cp)undo();
			solve(l , mid - 1 , ur);
			return;
		}
	}
	int chp = und.size();
	for(int i = ur - 1 ; i > l ; i --){
		merge(a[i] , b[i] + n);
		merge(b[i] , a[i] + n);
		if(getpar(a[i]) == getpar(a[i] + n)){
			mn[mid] = i;
			break;
		}
	}
	while(und.size() > chp)undo();
	solve(mid + 1 , r , ur);
	while(und.size() > cp)undo();
	for(int i = ur - 1 ; i >= max(mn[mid] , l + 1) ; i --){
		merge(a[i] , b[i] + n);
		merge(b[i] , a[i] + n);
		if(getpar(a[i]) == getpar(b[i])){
			for(int j = l ; j < mid ; j ++)
				mn[j] = mn[mid];
			return;
		}
	}
	solve(l , mid - 1 , mn[mid]);
}

int32_t main(){
	ios::sync_with_stdio(false),cin.tie(0),cout.tie(0);
	cin >> n >> m >> q;
	ms(par, -1);
	for(int i = 1 ; i <= m ; i ++)
		cin >> a[i] >> b[i];
	solve(0 , m - 1 , m + 1);
	while(q --){
		int l , r;
		cin >> l >> r;
		cout << ((r < mn[l - 1]) ? "YES" : "NO") << endl;
	}
	return(0);
}

Compilation message

Joker.cpp: In function 'void solve(int, int, int)':
Joker.cpp:50:21: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   50 |    while(und.size() > cp)undo();
      |          ~~~~~~~~~~~^~~~
Joker.cpp:64:19: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   64 |  while(und.size() > chp)undo();
      |        ~~~~~~~~~~~^~~~~
Joker.cpp:66:19: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   66 |  while(und.size() > cp)undo();
      |        ~~~~~~~~~~~^~~~

Subtask #1
6.0 / 6.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	1868 KB	Output is correct
2	Correct	2 ms	1868 KB	Output is correct
3	Correct	1 ms	1868 KB	Output is correct
4	Correct	1 ms	1868 KB	Output is correct
5	Correct	1 ms	1868 KB	Output is correct
6	Correct	2 ms	1868 KB	Output is correct
7	Correct	2 ms	1908 KB	Output is correct
8	Correct	3 ms	1868 KB	Output is correct
9	Correct	2 ms	1868 KB	Output is correct
10	Correct	2 ms	1868 KB	Output is correct
11	Correct	2 ms	1868 KB	Output is correct
12	Correct	2 ms	1864 KB	Output is correct
13	Correct	2 ms	1864 KB	Output is correct
14	Correct	2 ms	1848 KB	Output is correct
15	Correct	2 ms	1868 KB	Output is correct
16	Correct	2 ms	1860 KB	Output is correct
17	Correct	2 ms	1868 KB	Output is correct
18	Correct	2 ms	1864 KB	Output is correct
19	Correct	2 ms	1868 KB	Output is correct
20	Correct	1 ms	1868 KB	Output is correct
21	Correct	2 ms	1868 KB	Output is correct
22	Correct	2 ms	1868 KB	Output is correct
23	Correct	2 ms	1868 KB	Output is correct
24	Correct	1 ms	1868 KB	Output is correct
25	Correct	2 ms	1864 KB	Output is correct
26	Correct	2 ms	1868 KB	Output is correct
27	Correct	2 ms	1868 KB	Output is correct
28	Correct	2 ms	1864 KB	Output is correct

Subtask #2
8.0 / 8.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	1868 KB	Output is correct
2	Correct	2 ms	1868 KB	Output is correct
3	Correct	1 ms	1868 KB	Output is correct
4	Correct	1 ms	1868 KB	Output is correct
5	Correct	1 ms	1868 KB	Output is correct
6	Correct	2 ms	1868 KB	Output is correct
7	Correct	2 ms	1908 KB	Output is correct
8	Correct	3 ms	1868 KB	Output is correct
9	Correct	2 ms	1868 KB	Output is correct
10	Correct	2 ms	1868 KB	Output is correct
11	Correct	2 ms	1868 KB	Output is correct
12	Correct	2 ms	1864 KB	Output is correct
13	Correct	2 ms	1864 KB	Output is correct
14	Correct	2 ms	1848 KB	Output is correct
15	Correct	2 ms	1868 KB	Output is correct
16	Correct	2 ms	1860 KB	Output is correct
17	Correct	2 ms	1868 KB	Output is correct
18	Correct	2 ms	1864 KB	Output is correct
19	Correct	2 ms	1868 KB	Output is correct
20	Correct	1 ms	1868 KB	Output is correct
21	Correct	2 ms	1868 KB	Output is correct
22	Correct	2 ms	1868 KB	Output is correct
23	Correct	2 ms	1868 KB	Output is correct
24	Correct	1 ms	1868 KB	Output is correct
25	Correct	2 ms	1864 KB	Output is correct
26	Correct	2 ms	1868 KB	Output is correct
27	Correct	2 ms	1868 KB	Output is correct
28	Correct	2 ms	1864 KB	Output is correct
29	Correct	2 ms	1876 KB	Output is correct
30	Correct	3 ms	1996 KB	Output is correct
31	Correct	4 ms	1996 KB	Output is correct
32	Correct	4 ms	1996 KB	Output is correct
33	Correct	3 ms	1868 KB	Output is correct
34	Correct	3 ms	1996 KB	Output is correct
35	Correct	3 ms	1996 KB	Output is correct
36	Correct	4 ms	1996 KB	Output is correct
37	Correct	4 ms	1996 KB	Output is correct
38	Correct	5 ms	1996 KB	Output is correct
39	Correct	3 ms	2004 KB	Output is correct
40	Correct	3 ms	1952 KB	Output is correct
41	Correct	3 ms	1996 KB	Output is correct
42	Correct	4 ms	2000 KB	Output is correct
43	Correct	3 ms	1996 KB	Output is correct
44	Correct	3 ms	1996 KB	Output is correct
45	Correct	3 ms	2008 KB	Output is correct
46	Correct	4 ms	1996 KB	Output is correct
47	Correct	4 ms	1996 KB	Output is correct
48	Correct	3 ms	1996 KB	Output is correct
49	Correct	3 ms	1996 KB	Output is correct
50	Correct	4 ms	1996 KB	Output is correct
51	Correct	4 ms	1996 KB	Output is correct
52	Correct	3 ms	1952 KB	Output is correct
53	Correct	3 ms	1996 KB	Output is correct
54	Correct	4 ms	1996 KB	Output is correct

Subtask #3
25.0 / 25.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	1868 KB	Output is correct
2	Correct	2 ms	1868 KB	Output is correct
3	Correct	261 ms	6556 KB	Output is correct
4	Correct	240 ms	7624 KB	Output is correct
5	Correct	164 ms	11984 KB	Output is correct
6	Correct	174 ms	10516 KB	Output is correct
7	Correct	169 ms	10480 KB	Output is correct
8	Correct	169 ms	9336 KB	Output is correct
9	Correct	202 ms	9784 KB	Output is correct
10	Correct	301 ms	10248 KB	Output is correct
11	Correct	240 ms	10272 KB	Output is correct
12	Correct	272 ms	10796 KB	Output is correct
13	Correct	189 ms	9144 KB	Output is correct
14	Correct	182 ms	9864 KB	Output is correct
15	Correct	300 ms	10480 KB	Output is correct
16	Correct	312 ms	10684 KB	Output is correct

Subtask #4
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	1868 KB	Output is correct
2	Correct	2 ms	1868 KB	Output is correct
3	Correct	1 ms	1868 KB	Output is correct
4	Correct	1 ms	1868 KB	Output is correct
5	Correct	1 ms	1868 KB	Output is correct
6	Correct	2 ms	1868 KB	Output is correct
7	Correct	2 ms	1908 KB	Output is correct
8	Correct	3 ms	1868 KB	Output is correct
9	Correct	2 ms	1868 KB	Output is correct
10	Correct	2 ms	1868 KB	Output is correct
11	Correct	2 ms	1868 KB	Output is correct
12	Correct	2 ms	1864 KB	Output is correct
13	Correct	2 ms	1864 KB	Output is correct
14	Correct	2 ms	1848 KB	Output is correct
15	Correct	2 ms	1868 KB	Output is correct
16	Correct	2 ms	1860 KB	Output is correct
17	Correct	2 ms	1868 KB	Output is correct
18	Correct	2 ms	1864 KB	Output is correct
19	Correct	2 ms	1868 KB	Output is correct
20	Correct	1 ms	1868 KB	Output is correct
21	Correct	2 ms	1868 KB	Output is correct
22	Correct	2 ms	1868 KB	Output is correct
23	Correct	2 ms	1868 KB	Output is correct
24	Correct	1 ms	1868 KB	Output is correct
25	Correct	2 ms	1864 KB	Output is correct
26	Correct	2 ms	1868 KB	Output is correct
27	Correct	2 ms	1868 KB	Output is correct
28	Correct	2 ms	1864 KB	Output is correct
29	Correct	261 ms	6556 KB	Output is correct
30	Correct	240 ms	7624 KB	Output is correct
31	Correct	164 ms	11984 KB	Output is correct
32	Correct	174 ms	10516 KB	Output is correct
33	Correct	169 ms	10480 KB	Output is correct
34	Correct	169 ms	9336 KB	Output is correct
35	Correct	202 ms	9784 KB	Output is correct
36	Correct	301 ms	10248 KB	Output is correct
37	Correct	240 ms	10272 KB	Output is correct
38	Correct	272 ms	10796 KB	Output is correct
39	Correct	189 ms	9144 KB	Output is correct
40	Correct	182 ms	9864 KB	Output is correct
41	Correct	300 ms	10480 KB	Output is correct
42	Correct	312 ms	10684 KB	Output is correct
43	Correct	269 ms	10772 KB	Output is correct
44	Correct	241 ms	11368 KB	Output is correct
45	Correct	311 ms	12500 KB	Output is correct
46	Correct	143 ms	10792 KB	Output is correct
47	Correct	168 ms	10864 KB	Output is correct
48	Correct	234 ms	10288 KB	Output is correct
49	Correct	328 ms	10788 KB	Output is correct
50	Correct	221 ms	10388 KB	Output is correct
51	Correct	247 ms	10960 KB	Output is correct
52	Correct	294 ms	11048 KB	Output is correct
53	Correct	204 ms	9480 KB	Output is correct
54	Correct	258 ms	10356 KB	Output is correct
55	Correct	315 ms	11064 KB	Output is correct
56	Correct	304 ms	11036 KB	Output is correct

Subtask #5
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	1868 KB	Output is correct
2	Correct	2 ms	1868 KB	Output is correct
3	Correct	1 ms	1868 KB	Output is correct
4	Correct	1 ms	1868 KB	Output is correct
5	Correct	1 ms	1868 KB	Output is correct
6	Correct	2 ms	1868 KB	Output is correct
7	Correct	2 ms	1908 KB	Output is correct
8	Correct	3 ms	1868 KB	Output is correct
9	Correct	2 ms	1868 KB	Output is correct
10	Correct	2 ms	1868 KB	Output is correct
11	Correct	2 ms	1868 KB	Output is correct
12	Correct	2 ms	1864 KB	Output is correct
13	Correct	2 ms	1864 KB	Output is correct
14	Correct	2 ms	1848 KB	Output is correct
15	Correct	2 ms	1868 KB	Output is correct
16	Correct	2 ms	1860 KB	Output is correct
17	Correct	2 ms	1868 KB	Output is correct
18	Correct	2 ms	1864 KB	Output is correct
19	Correct	2 ms	1868 KB	Output is correct
20	Correct	1 ms	1868 KB	Output is correct
21	Correct	2 ms	1868 KB	Output is correct
22	Correct	2 ms	1868 KB	Output is correct
23	Correct	2 ms	1868 KB	Output is correct
24	Correct	1 ms	1868 KB	Output is correct
25	Correct	2 ms	1864 KB	Output is correct
26	Correct	2 ms	1868 KB	Output is correct
27	Correct	2 ms	1868 KB	Output is correct
28	Correct	2 ms	1864 KB	Output is correct
29	Correct	2 ms	1876 KB	Output is correct
30	Correct	3 ms	1996 KB	Output is correct
31	Correct	4 ms	1996 KB	Output is correct
32	Correct	4 ms	1996 KB	Output is correct
33	Correct	3 ms	1868 KB	Output is correct
34	Correct	3 ms	1996 KB	Output is correct
35	Correct	3 ms	1996 KB	Output is correct
36	Correct	4 ms	1996 KB	Output is correct
37	Correct	4 ms	1996 KB	Output is correct
38	Correct	5 ms	1996 KB	Output is correct
39	Correct	3 ms	2004 KB	Output is correct
40	Correct	3 ms	1952 KB	Output is correct
41	Correct	3 ms	1996 KB	Output is correct
42	Correct	4 ms	2000 KB	Output is correct
43	Correct	3 ms	1996 KB	Output is correct
44	Correct	3 ms	1996 KB	Output is correct
45	Correct	3 ms	2008 KB	Output is correct
46	Correct	4 ms	1996 KB	Output is correct
47	Correct	4 ms	1996 KB	Output is correct
48	Correct	3 ms	1996 KB	Output is correct
49	Correct	3 ms	1996 KB	Output is correct
50	Correct	4 ms	1996 KB	Output is correct
51	Correct	4 ms	1996 KB	Output is correct
52	Correct	3 ms	1952 KB	Output is correct
53	Correct	3 ms	1996 KB	Output is correct
54	Correct	4 ms	1996 KB	Output is correct
55	Correct	185 ms	8236 KB	Output is correct
56	Correct	185 ms	10208 KB	Output is correct
57	Correct	111 ms	10172 KB	Output is correct
58	Correct	104 ms	8372 KB	Output is correct
59	Correct	169 ms	7964 KB	Output is correct
60	Correct	285 ms	8528 KB	Output is correct
61	Correct	213 ms	8060 KB	Output is correct
62	Correct	206 ms	8464 KB	Output is correct
63	Correct	128 ms	7252 KB	Output is correct
64	Correct	205 ms	8432 KB	Output is correct
65	Correct	311 ms	8460 KB	Output is correct

Subtask #6
29.0 / 29.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	1868 KB	Output is correct
2	Correct	2 ms	1868 KB	Output is correct
3	Correct	1 ms	1868 KB	Output is correct
4	Correct	1 ms	1868 KB	Output is correct
5	Correct	1 ms	1868 KB	Output is correct
6	Correct	2 ms	1868 KB	Output is correct
7	Correct	2 ms	1908 KB	Output is correct
8	Correct	3 ms	1868 KB	Output is correct
9	Correct	2 ms	1868 KB	Output is correct
10	Correct	2 ms	1868 KB	Output is correct
11	Correct	2 ms	1868 KB	Output is correct
12	Correct	2 ms	1864 KB	Output is correct
13	Correct	2 ms	1864 KB	Output is correct
14	Correct	2 ms	1848 KB	Output is correct
15	Correct	2 ms	1868 KB	Output is correct
16	Correct	2 ms	1860 KB	Output is correct
17	Correct	2 ms	1868 KB	Output is correct
18	Correct	2 ms	1864 KB	Output is correct
19	Correct	2 ms	1868 KB	Output is correct
20	Correct	1 ms	1868 KB	Output is correct
21	Correct	2 ms	1868 KB	Output is correct
22	Correct	2 ms	1868 KB	Output is correct
23	Correct	2 ms	1868 KB	Output is correct
24	Correct	1 ms	1868 KB	Output is correct
25	Correct	2 ms	1864 KB	Output is correct
26	Correct	2 ms	1868 KB	Output is correct
27	Correct	2 ms	1868 KB	Output is correct
28	Correct	2 ms	1864 KB	Output is correct
29	Correct	2 ms	1876 KB	Output is correct
30	Correct	3 ms	1996 KB	Output is correct
31	Correct	4 ms	1996 KB	Output is correct
32	Correct	4 ms	1996 KB	Output is correct
33	Correct	3 ms	1868 KB	Output is correct
34	Correct	3 ms	1996 KB	Output is correct
35	Correct	3 ms	1996 KB	Output is correct
36	Correct	4 ms	1996 KB	Output is correct
37	Correct	4 ms	1996 KB	Output is correct
38	Correct	5 ms	1996 KB	Output is correct
39	Correct	3 ms	2004 KB	Output is correct
40	Correct	3 ms	1952 KB	Output is correct
41	Correct	3 ms	1996 KB	Output is correct
42	Correct	4 ms	2000 KB	Output is correct
43	Correct	3 ms	1996 KB	Output is correct
44	Correct	3 ms	1996 KB	Output is correct
45	Correct	3 ms	2008 KB	Output is correct
46	Correct	4 ms	1996 KB	Output is correct
47	Correct	4 ms	1996 KB	Output is correct
48	Correct	3 ms	1996 KB	Output is correct
49	Correct	3 ms	1996 KB	Output is correct
50	Correct	4 ms	1996 KB	Output is correct
51	Correct	4 ms	1996 KB	Output is correct
52	Correct	3 ms	1952 KB	Output is correct
53	Correct	3 ms	1996 KB	Output is correct
54	Correct	4 ms	1996 KB	Output is correct
55	Correct	261 ms	6556 KB	Output is correct
56	Correct	240 ms	7624 KB	Output is correct
57	Correct	164 ms	11984 KB	Output is correct
58	Correct	174 ms	10516 KB	Output is correct
59	Correct	169 ms	10480 KB	Output is correct
60	Correct	169 ms	9336 KB	Output is correct
61	Correct	202 ms	9784 KB	Output is correct
62	Correct	301 ms	10248 KB	Output is correct
63	Correct	240 ms	10272 KB	Output is correct
64	Correct	272 ms	10796 KB	Output is correct
65	Correct	189 ms	9144 KB	Output is correct
66	Correct	182 ms	9864 KB	Output is correct
67	Correct	300 ms	10480 KB	Output is correct
68	Correct	312 ms	10684 KB	Output is correct
69	Correct	269 ms	10772 KB	Output is correct
70	Correct	241 ms	11368 KB	Output is correct
71	Correct	311 ms	12500 KB	Output is correct
72	Correct	143 ms	10792 KB	Output is correct
73	Correct	168 ms	10864 KB	Output is correct
74	Correct	234 ms	10288 KB	Output is correct
75	Correct	328 ms	10788 KB	Output is correct
76	Correct	221 ms	10388 KB	Output is correct
77	Correct	247 ms	10960 KB	Output is correct
78	Correct	294 ms	11048 KB	Output is correct
79	Correct	204 ms	9480 KB	Output is correct
80	Correct	258 ms	10356 KB	Output is correct
81	Correct	315 ms	11064 KB	Output is correct
82	Correct	304 ms	11036 KB	Output is correct
83	Correct	185 ms	8236 KB	Output is correct
84	Correct	185 ms	10208 KB	Output is correct
85	Correct	111 ms	10172 KB	Output is correct
86	Correct	104 ms	8372 KB	Output is correct
87	Correct	169 ms	7964 KB	Output is correct
88	Correct	285 ms	8528 KB	Output is correct
89	Correct	213 ms	8060 KB	Output is correct
90	Correct	206 ms	8464 KB	Output is correct
91	Correct	128 ms	7252 KB	Output is correct
92	Correct	205 ms	8432 KB	Output is correct
93	Correct	311 ms	8460 KB	Output is correct
94	Correct	251 ms	11496 KB	Output is correct
95	Correct	302 ms	13196 KB	Output is correct
96	Correct	157 ms	12916 KB	Output is correct
97	Correct	166 ms	11584 KB	Output is correct
98	Correct	177 ms	11576 KB	Output is correct
99	Correct	224 ms	10896 KB	Output is correct
100	Correct	268 ms	11748 KB	Output is correct
101	Correct	233 ms	11084 KB	Output is correct
102	Correct	267 ms	11596 KB	Output is correct
103	Correct	304 ms	11876 KB	Output is correct
104	Correct	198 ms	10572 KB	Output is correct
105	Correct	275 ms	11468 KB	Output is correct
106	Correct	348 ms	11800 KB	Output is correct
107	Correct	143 ms	13368 KB	Output is correct
108	Correct	245 ms	11260 KB	Output is correct
109	Correct	256 ms	11364 KB	Output is correct
110	Correct	250 ms	11340 KB	Output is correct
111	Correct	256 ms	11448 KB	Output is correct
112	Correct	261 ms	11388 KB	Output is correct
113	Correct	263 ms	11556 KB	Output is correct
114	Correct	245 ms	11292 KB	Output is correct
115	Correct	263 ms	11304 KB	Output is correct
116	Correct	266 ms	11340 KB	Output is correct

답안 #439549

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