Submission #800610

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
800610	2023-08-01T16:43:54 Z	Dan4Life	Monochrome Points (JOI20_monochrome)	C++17	35 / 100	195 ms	868 KB

monochrome

#include <bits/stdc++.h>
using namespace std;
const int N = (int)4e3+10;
string s; int n, ans, tot, fen[N], st[N];
void upd(int x, int v){ for(; x<N; x+=x&-x) fen[x]+=v; }
int sum(int x){ int s=0; for(; x>0; x-=x&-x)s+=fen[x]; return s; }
int sum(int a, int b){ return (a<=b)*(sum(b)-sum(a-1)); }

int main()
{
    cin >> n >> s; vector<int> v[2]; if(n>2000) {cout<<0;return 0;}
    for(int i = 0; i < 2*n; i++) v[s[i]>'B'].push_back(i+1);
    for(int k = 0; k < n; k++){ tot=0;
        for(int i = 0; i < n; i++){
            int a = v[0][i], b = v[1][(i+k)%n];
            if(a>b) swap(a,b); st[a] = a; st[b]=a;
        }
        for(int i = 1; i <= 2*n; i++){
            if(st[i]==i) upd(st[i],1);
            else tot+=sum(st[i]+1,i), upd(st[i],-1);
        }
        ans = max(ans, tot);
    }
    cout << ans;
}

Compilation message

monochrome.cpp: In function 'int main()':
monochrome.cpp:16:13: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   16 |             if(a>b) swap(a,b); st[a] = a; st[b]=a;
      |             ^~
monochrome.cpp:16:32: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   16 |             if(a>b) swap(a,b); st[a] = a; st[b]=a;
      |                                ^~

Subtask #1
4.0 / 4.0

#	Verdict	Memory	Grader output
1	Correct	212 KB	Output is correct
2	Correct	212 KB	Output is correct
3	Correct	212 KB	Output is correct
4	Correct	212 KB	Output is correct
5	Correct	212 KB	Output is correct
6	Correct	260 KB	Output is correct
7	Correct	212 KB	Output is correct
8	Correct	212 KB	Output is correct
9	Correct	212 KB	Output is correct
10	Correct	212 KB	Output is correct
11	Correct	212 KB	Output is correct
12	Correct	212 KB	Output is correct
13	Correct	212 KB	Output is correct

Subtask #2
21.0 / 21.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	0 ms	212 KB	Output is correct
4	Correct	0 ms	212 KB	Output is correct
5	Correct	0 ms	212 KB	Output is correct
6	Correct	0 ms	260 KB	Output is correct
7	Correct	0 ms	212 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	212 KB	Output is correct
14	Correct	4 ms	212 KB	Output is correct
15	Correct	4 ms	212 KB	Output is correct
16	Correct	4 ms	212 KB	Output is correct
17	Correct	4 ms	212 KB	Output is correct
18	Correct	3 ms	212 KB	Output is correct
19	Correct	3 ms	324 KB	Output is correct
20	Correct	3 ms	212 KB	Output is correct
21	Correct	4 ms	212 KB	Output is correct
22	Correct	3 ms	212 KB	Output is correct
23	Correct	2 ms	212 KB	Output is correct
24	Correct	3 ms	212 KB	Output is correct
25	Correct	3 ms	212 KB	Output is correct
26	Correct	3 ms	212 KB	Output is correct
27	Correct	3 ms	320 KB	Output is correct
28	Correct	3 ms	212 KB	Output is correct
29	Correct	3 ms	212 KB	Output is correct
30	Correct	3 ms	212 KB	Output is correct
31	Correct	3 ms	212 KB	Output is correct
32	Correct	3 ms	212 KB	Output is correct
33	Correct	3 ms	212 KB	Output is correct

Subtask #3
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	0 ms	212 KB	Output is correct
4	Correct	0 ms	212 KB	Output is correct
5	Correct	0 ms	212 KB	Output is correct
6	Correct	0 ms	260 KB	Output is correct
7	Correct	0 ms	212 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	212 KB	Output is correct
14	Correct	4 ms	212 KB	Output is correct
15	Correct	4 ms	212 KB	Output is correct
16	Correct	4 ms	212 KB	Output is correct
17	Correct	4 ms	212 KB	Output is correct
18	Correct	3 ms	212 KB	Output is correct
19	Correct	3 ms	324 KB	Output is correct
20	Correct	3 ms	212 KB	Output is correct
21	Correct	4 ms	212 KB	Output is correct
22	Correct	3 ms	212 KB	Output is correct
23	Correct	2 ms	212 KB	Output is correct
24	Correct	3 ms	212 KB	Output is correct
25	Correct	3 ms	212 KB	Output is correct
26	Correct	3 ms	212 KB	Output is correct
27	Correct	3 ms	320 KB	Output is correct
28	Correct	3 ms	212 KB	Output is correct
29	Correct	3 ms	212 KB	Output is correct
30	Correct	3 ms	212 KB	Output is correct
31	Correct	3 ms	212 KB	Output is correct
32	Correct	3 ms	212 KB	Output is correct
33	Correct	3 ms	212 KB	Output is correct
34	Correct	186 ms	356 KB	Output is correct
35	Correct	195 ms	340 KB	Output is correct
36	Correct	173 ms	340 KB	Output is correct
37	Correct	162 ms	340 KB	Output is correct
38	Correct	107 ms	340 KB	Output is correct
39	Correct	128 ms	360 KB	Output is correct
40	Correct	114 ms	340 KB	Output is correct
41	Correct	112 ms	340 KB	Output is correct
42	Correct	171 ms	340 KB	Output is correct
43	Correct	142 ms	344 KB	Output is correct
44	Correct	130 ms	344 KB	Output is correct
45	Correct	130 ms	340 KB	Output is correct
46	Correct	140 ms	344 KB	Output is correct
47	Correct	142 ms	340 KB	Output is correct
48	Correct	130 ms	364 KB	Output is correct
49	Correct	102 ms	344 KB	Output is correct
50	Correct	125 ms	340 KB	Output is correct
51	Correct	137 ms	340 KB	Output is correct
52	Correct	131 ms	340 KB	Output is correct

Subtask #4
0.0 / 65.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	0 ms	212 KB	Output is correct
4	Correct	0 ms	212 KB	Output is correct
5	Correct	0 ms	212 KB	Output is correct
6	Correct	0 ms	260 KB	Output is correct
7	Correct	0 ms	212 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	212 KB	Output is correct
14	Correct	4 ms	212 KB	Output is correct
15	Correct	4 ms	212 KB	Output is correct
16	Correct	4 ms	212 KB	Output is correct
17	Correct	4 ms	212 KB	Output is correct
18	Correct	3 ms	212 KB	Output is correct
19	Correct	3 ms	324 KB	Output is correct
20	Correct	3 ms	212 KB	Output is correct
21	Correct	4 ms	212 KB	Output is correct
22	Correct	3 ms	212 KB	Output is correct
23	Correct	2 ms	212 KB	Output is correct
24	Correct	3 ms	212 KB	Output is correct
25	Correct	3 ms	212 KB	Output is correct
26	Correct	3 ms	212 KB	Output is correct
27	Correct	3 ms	320 KB	Output is correct
28	Correct	3 ms	212 KB	Output is correct
29	Correct	3 ms	212 KB	Output is correct
30	Correct	3 ms	212 KB	Output is correct
31	Correct	3 ms	212 KB	Output is correct
32	Correct	3 ms	212 KB	Output is correct
33	Correct	3 ms	212 KB	Output is correct
34	Correct	186 ms	356 KB	Output is correct
35	Correct	195 ms	340 KB	Output is correct
36	Correct	173 ms	340 KB	Output is correct
37	Correct	162 ms	340 KB	Output is correct
38	Correct	107 ms	340 KB	Output is correct
39	Correct	128 ms	360 KB	Output is correct
40	Correct	114 ms	340 KB	Output is correct
41	Correct	112 ms	340 KB	Output is correct
42	Correct	171 ms	340 KB	Output is correct
43	Correct	142 ms	344 KB	Output is correct
44	Correct	130 ms	344 KB	Output is correct
45	Correct	130 ms	340 KB	Output is correct
46	Correct	140 ms	344 KB	Output is correct
47	Correct	142 ms	340 KB	Output is correct
48	Correct	130 ms	364 KB	Output is correct
49	Correct	102 ms	344 KB	Output is correct
50	Correct	125 ms	340 KB	Output is correct
51	Correct	137 ms	340 KB	Output is correct
52	Correct	131 ms	340 KB	Output is correct
53	Incorrect	6 ms	868 KB	Output isn't correct
54	Halted	0 ms	0 KB	-

Submission #800610

Compilation message

Subtask #1 4.0 / 4.0

Subtask #2 21.0 / 21.0

Subtask #3 10.0 / 10.0

Subtask #4 0.0 / 65.0

Subtask #1
4.0 / 4.0

Subtask #2
21.0 / 21.0

Subtask #3
10.0 / 10.0

Subtask #4
0.0 / 65.0