Submission #502581

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
502581	2022-01-06T09:49:25 Z	amunduzbaev	Monochrome Points (JOI20_monochrome)	C++14	100 / 100	1193 ms	10828 KB

monochrome

#include "bits/stdc++.h"
using namespace std;

#define ar array
#define int long long

const int N = 4e5 + 5;

struct BIT{
	int tree[N];
	void add(int i, int v){ i++;
		for(;i<N;i+=(i&-i)) tree[i] += v;
	}
	
	int get(int i){ i++;
		int rr = 0;
		for(;i>0;i-=(i&-i)) rr += tree[i];
		return rr;
	}
	
	int get(int l, int r){
		return get(r) - get(l-1);
	}
}tree;

signed main(){
	ios::sync_with_stdio(0); cin.tie(0);
	
	int n; cin>>n;
	string s; cin>>s;
	ar<vector<int>, 2> p;
	for(int i=0;i<2*n;i++){
		p[s[i] == 'B'].push_back(i);
	}
	
	auto check = [&](int k){
		memset(tree.tree, 0, sizeof tree.tree);
		int res = 0;
		vector<ar<int, 2>> a(n);
		for(int i=0;i<n;i++){
			int j = (i + k) % n;
			a[i] = {p[0][i], p[1][j]};
			if(a[i][0] > a[i][1]) swap(a[i][0], a[i][1]);
		}
		
		sort(a.begin(), a.end());
		for(auto x : a){
			res += tree.get(x[0], x[1]);
			tree.add(x[1], 1);
		} return res;
	};
	
	int l = 0, r = n - 1;
	while(l < r){
		int m = (l + r) >> 1;
		if(check(m) < check(m + 1)) l = m + 1;
		else r = m;
	}
	
	cout<<check(l)<<"\n";
}

Subtask #1
4.0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	3408 KB	Output is correct
2	Correct	2 ms	3404 KB	Output is correct
3	Correct	2 ms	3404 KB	Output is correct
4	Correct	2 ms	3404 KB	Output is correct
5	Correct	2 ms	3404 KB	Output is correct
6	Correct	2 ms	3404 KB	Output is correct
7	Correct	2 ms	3404 KB	Output is correct
8	Correct	2 ms	3404 KB	Output is correct
9	Correct	2 ms	3404 KB	Output is correct
10	Correct	2 ms	3404 KB	Output is correct
11	Correct	2 ms	3404 KB	Output is correct
12	Correct	2 ms	3404 KB	Output is correct
13	Correct	2 ms	3404 KB	Output is correct

Subtask #2
21.0 / 21.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	3408 KB	Output is correct
2	Correct	2 ms	3404 KB	Output is correct
3	Correct	2 ms	3404 KB	Output is correct
4	Correct	2 ms	3404 KB	Output is correct
5	Correct	2 ms	3404 KB	Output is correct
6	Correct	2 ms	3404 KB	Output is correct
7	Correct	2 ms	3404 KB	Output is correct
8	Correct	2 ms	3404 KB	Output is correct
9	Correct	2 ms	3404 KB	Output is correct
10	Correct	2 ms	3404 KB	Output is correct
11	Correct	2 ms	3404 KB	Output is correct
12	Correct	2 ms	3404 KB	Output is correct
13	Correct	2 ms	3404 KB	Output is correct
14	Correct	4 ms	3460 KB	Output is correct
15	Correct	3 ms	3404 KB	Output is correct
16	Correct	3 ms	3404 KB	Output is correct
17	Correct	5 ms	3456 KB	Output is correct
18	Correct	4 ms	3404 KB	Output is correct
19	Correct	4 ms	3404 KB	Output is correct
20	Correct	3 ms	3404 KB	Output is correct
21	Correct	5 ms	3404 KB	Output is correct
22	Correct	3 ms	3404 KB	Output is correct
23	Correct	3 ms	3404 KB	Output is correct
24	Correct	3 ms	3404 KB	Output is correct
25	Correct	3 ms	3404 KB	Output is correct
26	Correct	3 ms	3404 KB	Output is correct
27	Correct	3 ms	3404 KB	Output is correct
28	Correct	3 ms	3404 KB	Output is correct
29	Correct	4 ms	3404 KB	Output is correct
30	Correct	3 ms	3404 KB	Output is correct
31	Correct	3 ms	3404 KB	Output is correct
32	Correct	3 ms	3404 KB	Output is correct
33	Correct	3 ms	3404 KB	Output is correct

Subtask #3
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	3408 KB	Output is correct
2	Correct	2 ms	3404 KB	Output is correct
3	Correct	2 ms	3404 KB	Output is correct
4	Correct	2 ms	3404 KB	Output is correct
5	Correct	2 ms	3404 KB	Output is correct
6	Correct	2 ms	3404 KB	Output is correct
7	Correct	2 ms	3404 KB	Output is correct
8	Correct	2 ms	3404 KB	Output is correct
9	Correct	2 ms	3404 KB	Output is correct
10	Correct	2 ms	3404 KB	Output is correct
11	Correct	2 ms	3404 KB	Output is correct
12	Correct	2 ms	3404 KB	Output is correct
13	Correct	2 ms	3404 KB	Output is correct
14	Correct	4 ms	3460 KB	Output is correct
15	Correct	3 ms	3404 KB	Output is correct
16	Correct	3 ms	3404 KB	Output is correct
17	Correct	5 ms	3456 KB	Output is correct
18	Correct	4 ms	3404 KB	Output is correct
19	Correct	4 ms	3404 KB	Output is correct
20	Correct	3 ms	3404 KB	Output is correct
21	Correct	5 ms	3404 KB	Output is correct
22	Correct	3 ms	3404 KB	Output is correct
23	Correct	3 ms	3404 KB	Output is correct
24	Correct	3 ms	3404 KB	Output is correct
25	Correct	3 ms	3404 KB	Output is correct
26	Correct	3 ms	3404 KB	Output is correct
27	Correct	3 ms	3404 KB	Output is correct
28	Correct	3 ms	3404 KB	Output is correct
29	Correct	4 ms	3404 KB	Output is correct
30	Correct	3 ms	3404 KB	Output is correct
31	Correct	3 ms	3404 KB	Output is correct
32	Correct	3 ms	3404 KB	Output is correct
33	Correct	3 ms	3404 KB	Output is correct
34	Correct	8 ms	3532 KB	Output is correct
35	Correct	8 ms	3524 KB	Output is correct
36	Correct	10 ms	3532 KB	Output is correct
37	Correct	9 ms	3404 KB	Output is correct
38	Correct	8 ms	3532 KB	Output is correct
39	Correct	8 ms	3404 KB	Output is correct
40	Correct	7 ms	3404 KB	Output is correct
41	Correct	7 ms	3404 KB	Output is correct
42	Correct	8 ms	3536 KB	Output is correct
43	Correct	8 ms	3404 KB	Output is correct
44	Correct	8 ms	3532 KB	Output is correct
45	Correct	7 ms	3404 KB	Output is correct
46	Correct	8 ms	3528 KB	Output is correct
47	Correct	7 ms	3404 KB	Output is correct
48	Correct	7 ms	3532 KB	Output is correct
49	Correct	6 ms	3404 KB	Output is correct
50	Correct	9 ms	3404 KB	Output is correct
51	Correct	7 ms	3532 KB	Output is correct
52	Correct	11 ms	3532 KB	Output is correct

Subtask #4
65.0 / 65.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	3408 KB	Output is correct
2	Correct	2 ms	3404 KB	Output is correct
3	Correct	2 ms	3404 KB	Output is correct
4	Correct	2 ms	3404 KB	Output is correct
5	Correct	2 ms	3404 KB	Output is correct
6	Correct	2 ms	3404 KB	Output is correct
7	Correct	2 ms	3404 KB	Output is correct
8	Correct	2 ms	3404 KB	Output is correct
9	Correct	2 ms	3404 KB	Output is correct
10	Correct	2 ms	3404 KB	Output is correct
11	Correct	2 ms	3404 KB	Output is correct
12	Correct	2 ms	3404 KB	Output is correct
13	Correct	2 ms	3404 KB	Output is correct
14	Correct	4 ms	3460 KB	Output is correct
15	Correct	3 ms	3404 KB	Output is correct
16	Correct	3 ms	3404 KB	Output is correct
17	Correct	5 ms	3456 KB	Output is correct
18	Correct	4 ms	3404 KB	Output is correct
19	Correct	4 ms	3404 KB	Output is correct
20	Correct	3 ms	3404 KB	Output is correct
21	Correct	5 ms	3404 KB	Output is correct
22	Correct	3 ms	3404 KB	Output is correct
23	Correct	3 ms	3404 KB	Output is correct
24	Correct	3 ms	3404 KB	Output is correct
25	Correct	3 ms	3404 KB	Output is correct
26	Correct	3 ms	3404 KB	Output is correct
27	Correct	3 ms	3404 KB	Output is correct
28	Correct	3 ms	3404 KB	Output is correct
29	Correct	4 ms	3404 KB	Output is correct
30	Correct	3 ms	3404 KB	Output is correct
31	Correct	3 ms	3404 KB	Output is correct
32	Correct	3 ms	3404 KB	Output is correct
33	Correct	3 ms	3404 KB	Output is correct
34	Correct	8 ms	3532 KB	Output is correct
35	Correct	8 ms	3524 KB	Output is correct
36	Correct	10 ms	3532 KB	Output is correct
37	Correct	9 ms	3404 KB	Output is correct
38	Correct	8 ms	3532 KB	Output is correct
39	Correct	8 ms	3404 KB	Output is correct
40	Correct	7 ms	3404 KB	Output is correct
41	Correct	7 ms	3404 KB	Output is correct
42	Correct	8 ms	3536 KB	Output is correct
43	Correct	8 ms	3404 KB	Output is correct
44	Correct	8 ms	3532 KB	Output is correct
45	Correct	7 ms	3404 KB	Output is correct
46	Correct	8 ms	3528 KB	Output is correct
47	Correct	7 ms	3404 KB	Output is correct
48	Correct	7 ms	3532 KB	Output is correct
49	Correct	6 ms	3404 KB	Output is correct
50	Correct	9 ms	3404 KB	Output is correct
51	Correct	7 ms	3532 KB	Output is correct
52	Correct	11 ms	3532 KB	Output is correct
53	Correct	1095 ms	10600 KB	Output is correct
54	Correct	1053 ms	10828 KB	Output is correct
55	Correct	1085 ms	10508 KB	Output is correct
56	Correct	1103 ms	10612 KB	Output is correct
57	Correct	1114 ms	10320 KB	Output is correct
58	Correct	873 ms	10604 KB	Output is correct
59	Correct	959 ms	10572 KB	Output is correct
60	Correct	1057 ms	10248 KB	Output is correct
61	Correct	1128 ms	10408 KB	Output is correct
62	Correct	1038 ms	10396 KB	Output is correct
63	Correct	1150 ms	10644 KB	Output is correct
64	Correct	847 ms	10256 KB	Output is correct
65	Correct	1038 ms	9952 KB	Output is correct
66	Correct	1027 ms	10192 KB	Output is correct
67	Correct	1116 ms	10252 KB	Output is correct
68	Correct	734 ms	9864 KB	Output is correct
69	Correct	854 ms	10568 KB	Output is correct
70	Correct	874 ms	9936 KB	Output is correct
71	Correct	1177 ms	10632 KB	Output is correct
72	Correct	680 ms	10592 KB	Output is correct
73	Correct	1193 ms	10820 KB	Output is correct

Submission #502581

Compilation message

Subtask #1 4.0 / 4.0

Subtask #2 21.0 / 21.0

Subtask #3 10.0 / 10.0

Subtask #4 65.0 / 65.0

Subtask #1
4.0 / 4.0

Subtask #2
21.0 / 21.0

Subtask #3
10.0 / 10.0

Subtask #4
65.0 / 65.0