Submission #593067

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
593067	2022-07-10T10:44:32 Z	GioChkhaidze	Monochrome Points (JOI20_monochrome)	C++14	100 / 100	41 ms	3424 KB

monochrome

#include <bits/stdc++.h>
#define ll long long
#define pb push_back
using namespace std;

string s;
ll n, ans;
vector < int > B, W;

ll check(int x) {
	ll res = 0;
	for (int i = 0; i < W.size(); ++i) {
		int l = W[i];
		int r = B[(i + x) % n];
		int len = abs(r - l) - 1;
		len = min(len, 2 * (int)n - len - 2);
		res += len;
	}
	res /= 2;
	ans = max(res, ans);
	return res;
}

main () {
	ios::sync_with_stdio(false);
	cin.tie(NULL);
	cin >> n >> s;
	for (int i = 0; i < s.size(); ++i) {
		if (s[i] == 'B')
			B.pb(i);
				else 
			W.pb(i);
	}
	
	int l = 0, r = n - 1, mid;
	while (l <= r) {
		mid = (l + r) / 2;
		if (check(mid) < check(mid + 1)) {
			l = mid + 1;
		}
			else {
			r = mid - 1;		
		}
	}
	cout << ans << "\n";
}

Compilation message

monochrome.cpp: In function 'long long int check(int)':
monochrome.cpp:12:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |  for (int i = 0; i < W.size(); ++i) {
      |                  ~~^~~~~~~~~~
monochrome.cpp: At global scope:
monochrome.cpp:24:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   24 | main () {
      | ^~~~
monochrome.cpp: In function 'int main()':
monochrome.cpp:28:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |  for (int i = 0; i < s.size(); ++i) {
      |                  ~~^~~~~~~~~~

Subtask #1
4.0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	1 ms	320 KB	Output is correct
3	Correct	0 ms	212 KB	Output is correct
4	Correct	0 ms	320 KB	Output is correct
5	Correct	0 ms	316 KB	Output is correct
6	Correct	1 ms	212 KB	Output is correct
7	Correct	1 ms	316 KB	Output is correct
8	Correct	0 ms	212 KB	Output is correct
9	Correct	0 ms	212 KB	Output is correct
10	Correct	0 ms	212 KB	Output is correct
11	Correct	0 ms	212 KB	Output is correct
12	Correct	0 ms	212 KB	Output is correct
13	Correct	0 ms	320 KB	Output is correct

Subtask #2
21.0 / 21.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	1 ms	320 KB	Output is correct
3	Correct	0 ms	212 KB	Output is correct
4	Correct	0 ms	320 KB	Output is correct
5	Correct	0 ms	316 KB	Output is correct
6	Correct	1 ms	212 KB	Output is correct
7	Correct	1 ms	316 KB	Output is correct
8	Correct	0 ms	212 KB	Output is correct
9	Correct	0 ms	212 KB	Output is correct
10	Correct	0 ms	212 KB	Output is correct
11	Correct	0 ms	212 KB	Output is correct
12	Correct	0 ms	212 KB	Output is correct
13	Correct	0 ms	320 KB	Output is correct
14	Correct	0 ms	212 KB	Output is correct
15	Correct	0 ms	212 KB	Output is correct
16	Correct	0 ms	212 KB	Output is correct
17	Correct	1 ms	212 KB	Output is correct
18	Correct	0 ms	212 KB	Output is correct
19	Correct	0 ms	324 KB	Output is correct
20	Correct	1 ms	212 KB	Output is correct
21	Correct	1 ms	212 KB	Output is correct
22	Correct	0 ms	212 KB	Output is correct
23	Correct	0 ms	212 KB	Output is correct
24	Correct	1 ms	212 KB	Output is correct
25	Correct	0 ms	212 KB	Output is correct
26	Correct	1 ms	212 KB	Output is correct
27	Correct	0 ms	212 KB	Output is correct
28	Correct	1 ms	320 KB	Output is correct
29	Correct	1 ms	212 KB	Output is correct
30	Correct	1 ms	212 KB	Output is correct
31	Correct	0 ms	212 KB	Output is correct
32	Correct	1 ms	212 KB	Output is correct
33	Correct	0 ms	212 KB	Output is correct

Subtask #3
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	1 ms	320 KB	Output is correct
3	Correct	0 ms	212 KB	Output is correct
4	Correct	0 ms	320 KB	Output is correct
5	Correct	0 ms	316 KB	Output is correct
6	Correct	1 ms	212 KB	Output is correct
7	Correct	1 ms	316 KB	Output is correct
8	Correct	0 ms	212 KB	Output is correct
9	Correct	0 ms	212 KB	Output is correct
10	Correct	0 ms	212 KB	Output is correct
11	Correct	0 ms	212 KB	Output is correct
12	Correct	0 ms	212 KB	Output is correct
13	Correct	0 ms	320 KB	Output is correct
14	Correct	0 ms	212 KB	Output is correct
15	Correct	0 ms	212 KB	Output is correct
16	Correct	0 ms	212 KB	Output is correct
17	Correct	1 ms	212 KB	Output is correct
18	Correct	0 ms	212 KB	Output is correct
19	Correct	0 ms	324 KB	Output is correct
20	Correct	1 ms	212 KB	Output is correct
21	Correct	1 ms	212 KB	Output is correct
22	Correct	0 ms	212 KB	Output is correct
23	Correct	0 ms	212 KB	Output is correct
24	Correct	1 ms	212 KB	Output is correct
25	Correct	0 ms	212 KB	Output is correct
26	Correct	1 ms	212 KB	Output is correct
27	Correct	0 ms	212 KB	Output is correct
28	Correct	1 ms	320 KB	Output is correct
29	Correct	1 ms	212 KB	Output is correct
30	Correct	1 ms	212 KB	Output is correct
31	Correct	0 ms	212 KB	Output is correct
32	Correct	1 ms	212 KB	Output is correct
33	Correct	0 ms	212 KB	Output is correct
34	Correct	1 ms	340 KB	Output is correct
35	Correct	1 ms	340 KB	Output is correct
36	Correct	1 ms	340 KB	Output is correct
37	Correct	1 ms	320 KB	Output is correct
38	Correct	1 ms	340 KB	Output is correct
39	Correct	1 ms	316 KB	Output is correct
40	Correct	1 ms	340 KB	Output is correct
41	Correct	1 ms	340 KB	Output is correct
42	Correct	1 ms	340 KB	Output is correct
43	Correct	1 ms	316 KB	Output is correct
44	Correct	1 ms	320 KB	Output is correct
45	Correct	1 ms	340 KB	Output is correct
46	Correct	1 ms	340 KB	Output is correct
47	Correct	1 ms	340 KB	Output is correct
48	Correct	1 ms	340 KB	Output is correct
49	Correct	1 ms	340 KB	Output is correct
50	Correct	1 ms	324 KB	Output is correct
51	Correct	1 ms	340 KB	Output is correct
52	Correct	1 ms	320 KB	Output is correct

Subtask #4
65.0 / 65.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	1 ms	320 KB	Output is correct
3	Correct	0 ms	212 KB	Output is correct
4	Correct	0 ms	320 KB	Output is correct
5	Correct	0 ms	316 KB	Output is correct
6	Correct	1 ms	212 KB	Output is correct
7	Correct	1 ms	316 KB	Output is correct
8	Correct	0 ms	212 KB	Output is correct
9	Correct	0 ms	212 KB	Output is correct
10	Correct	0 ms	212 KB	Output is correct
11	Correct	0 ms	212 KB	Output is correct
12	Correct	0 ms	212 KB	Output is correct
13	Correct	0 ms	320 KB	Output is correct
14	Correct	0 ms	212 KB	Output is correct
15	Correct	0 ms	212 KB	Output is correct
16	Correct	0 ms	212 KB	Output is correct
17	Correct	1 ms	212 KB	Output is correct
18	Correct	0 ms	212 KB	Output is correct
19	Correct	0 ms	324 KB	Output is correct
20	Correct	1 ms	212 KB	Output is correct
21	Correct	1 ms	212 KB	Output is correct
22	Correct	0 ms	212 KB	Output is correct
23	Correct	0 ms	212 KB	Output is correct
24	Correct	1 ms	212 KB	Output is correct
25	Correct	0 ms	212 KB	Output is correct
26	Correct	1 ms	212 KB	Output is correct
27	Correct	0 ms	212 KB	Output is correct
28	Correct	1 ms	320 KB	Output is correct
29	Correct	1 ms	212 KB	Output is correct
30	Correct	1 ms	212 KB	Output is correct
31	Correct	0 ms	212 KB	Output is correct
32	Correct	1 ms	212 KB	Output is correct
33	Correct	0 ms	212 KB	Output is correct
34	Correct	1 ms	340 KB	Output is correct
35	Correct	1 ms	340 KB	Output is correct
36	Correct	1 ms	340 KB	Output is correct
37	Correct	1 ms	320 KB	Output is correct
38	Correct	1 ms	340 KB	Output is correct
39	Correct	1 ms	316 KB	Output is correct
40	Correct	1 ms	340 KB	Output is correct
41	Correct	1 ms	340 KB	Output is correct
42	Correct	1 ms	340 KB	Output is correct
43	Correct	1 ms	316 KB	Output is correct
44	Correct	1 ms	320 KB	Output is correct
45	Correct	1 ms	340 KB	Output is correct
46	Correct	1 ms	340 KB	Output is correct
47	Correct	1 ms	340 KB	Output is correct
48	Correct	1 ms	340 KB	Output is correct
49	Correct	1 ms	340 KB	Output is correct
50	Correct	1 ms	324 KB	Output is correct
51	Correct	1 ms	340 KB	Output is correct
52	Correct	1 ms	320 KB	Output is correct
53	Correct	39 ms	3100 KB	Output is correct
54	Correct	41 ms	2792 KB	Output is correct
55	Correct	35 ms	2952 KB	Output is correct
56	Correct	37 ms	2972 KB	Output is correct
57	Correct	34 ms	2904 KB	Output is correct
58	Correct	38 ms	2876 KB	Output is correct
59	Correct	33 ms	2744 KB	Output is correct
60	Correct	34 ms	3008 KB	Output is correct
61	Correct	36 ms	2912 KB	Output is correct
62	Correct	38 ms	3044 KB	Output is correct
63	Correct	36 ms	2980 KB	Output is correct
64	Correct	35 ms	3296 KB	Output is correct
65	Correct	33 ms	2916 KB	Output is correct
66	Correct	34 ms	3296 KB	Output is correct
67	Correct	34 ms	3356 KB	Output is correct
68	Correct	33 ms	3296 KB	Output is correct
69	Correct	35 ms	3164 KB	Output is correct
70	Correct	34 ms	2664 KB	Output is correct
71	Correct	34 ms	3424 KB	Output is correct
72	Correct	35 ms	3416 KB	Output is correct
73	Correct	35 ms	3044 KB	Output is correct

Submission #593067

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