#include <bits/stdc++.h>
using namespace std;
#pragma GCC optimize("Ofast")
#pragma GCC optimize ("unroll-loops")
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
#define MottoHayaku ios::sync_with_stdio(false);cin.tie(0);
#define rep(i,n) for(int i=0;i<n;i++)
#define rep1(i,n) for(int i=1;i<=n;i++)
#define F first
#define S second
#define pb push_back
const int N=4005;
struct BIT
{
int a[N];
void init()
{
rep1(i,N-1) a[i]=0;
}
void upd(int x,int val)
{
for(;x<N;x+=x&-x) a[x]+=val;
}
int qry(int x)
{
int ret=0;
for(;x;x-=x&-x) ret+=a[x];
return ret;
}
} bit;
int to[N];
signed main()
{
MottoHayaku
int n;
cin>>n;
string s;
cin>>s;
vector<int> a,b;
rep(i,n*2)
{
if(s[i]=='B') a.pb(i+1);
else b.pb(i+1);
}
int ans=0;
rep(i,n)
{
rep(j,n)
{
to[a[j]]=b[(j+i)%n];
to[b[(j+i)%n]]=a[j];
}
bit.init();
int tot=0;
rep1(j,n*2)
{
if(to[j]<j) bit.upd(j,-1);
else
{
tot+=bit.qry(to[j]);
bit.upd(to[j],1);
}
}
ans=max(ans,tot);
}
cout<<ans<<"\n";
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
340 KB |
Output is correct |
2 |
Correct |
0 ms |
340 KB |
Output is correct |
3 |
Correct |
1 ms |
340 KB |
Output is correct |
4 |
Correct |
0 ms |
328 KB |
Output is correct |
5 |
Correct |
0 ms |
340 KB |
Output is correct |
6 |
Correct |
0 ms |
340 KB |
Output is correct |
7 |
Correct |
1 ms |
340 KB |
Output is correct |
8 |
Correct |
1 ms |
340 KB |
Output is correct |
9 |
Correct |
0 ms |
340 KB |
Output is correct |
10 |
Correct |
1 ms |
212 KB |
Output is correct |
11 |
Correct |
0 ms |
212 KB |
Output is correct |
12 |
Correct |
1 ms |
340 KB |
Output is correct |
13 |
Correct |
1 ms |
324 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
340 KB |
Output is correct |
2 |
Correct |
0 ms |
340 KB |
Output is correct |
3 |
Correct |
1 ms |
340 KB |
Output is correct |
4 |
Correct |
0 ms |
328 KB |
Output is correct |
5 |
Correct |
0 ms |
340 KB |
Output is correct |
6 |
Correct |
0 ms |
340 KB |
Output is correct |
7 |
Correct |
1 ms |
340 KB |
Output is correct |
8 |
Correct |
1 ms |
340 KB |
Output is correct |
9 |
Correct |
0 ms |
340 KB |
Output is correct |
10 |
Correct |
1 ms |
212 KB |
Output is correct |
11 |
Correct |
0 ms |
212 KB |
Output is correct |
12 |
Correct |
1 ms |
340 KB |
Output is correct |
13 |
Correct |
1 ms |
324 KB |
Output is correct |
14 |
Correct |
6 ms |
352 KB |
Output is correct |
15 |
Correct |
4 ms |
340 KB |
Output is correct |
16 |
Correct |
4 ms |
344 KB |
Output is correct |
17 |
Correct |
4 ms |
340 KB |
Output is correct |
18 |
Correct |
3 ms |
340 KB |
Output is correct |
19 |
Correct |
3 ms |
336 KB |
Output is correct |
20 |
Correct |
3 ms |
340 KB |
Output is correct |
21 |
Correct |
3 ms |
340 KB |
Output is correct |
22 |
Correct |
3 ms |
340 KB |
Output is correct |
23 |
Correct |
2 ms |
340 KB |
Output is correct |
24 |
Correct |
3 ms |
340 KB |
Output is correct |
25 |
Correct |
3 ms |
340 KB |
Output is correct |
26 |
Correct |
3 ms |
340 KB |
Output is correct |
27 |
Correct |
3 ms |
324 KB |
Output is correct |
28 |
Correct |
3 ms |
340 KB |
Output is correct |
29 |
Correct |
3 ms |
340 KB |
Output is correct |
30 |
Correct |
3 ms |
340 KB |
Output is correct |
31 |
Correct |
4 ms |
340 KB |
Output is correct |
32 |
Correct |
3 ms |
432 KB |
Output is correct |
33 |
Correct |
3 ms |
340 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
340 KB |
Output is correct |
2 |
Correct |
0 ms |
340 KB |
Output is correct |
3 |
Correct |
1 ms |
340 KB |
Output is correct |
4 |
Correct |
0 ms |
328 KB |
Output is correct |
5 |
Correct |
0 ms |
340 KB |
Output is correct |
6 |
Correct |
0 ms |
340 KB |
Output is correct |
7 |
Correct |
1 ms |
340 KB |
Output is correct |
8 |
Correct |
1 ms |
340 KB |
Output is correct |
9 |
Correct |
0 ms |
340 KB |
Output is correct |
10 |
Correct |
1 ms |
212 KB |
Output is correct |
11 |
Correct |
0 ms |
212 KB |
Output is correct |
12 |
Correct |
1 ms |
340 KB |
Output is correct |
13 |
Correct |
1 ms |
324 KB |
Output is correct |
14 |
Correct |
6 ms |
352 KB |
Output is correct |
15 |
Correct |
4 ms |
340 KB |
Output is correct |
16 |
Correct |
4 ms |
344 KB |
Output is correct |
17 |
Correct |
4 ms |
340 KB |
Output is correct |
18 |
Correct |
3 ms |
340 KB |
Output is correct |
19 |
Correct |
3 ms |
336 KB |
Output is correct |
20 |
Correct |
3 ms |
340 KB |
Output is correct |
21 |
Correct |
3 ms |
340 KB |
Output is correct |
22 |
Correct |
3 ms |
340 KB |
Output is correct |
23 |
Correct |
2 ms |
340 KB |
Output is correct |
24 |
Correct |
3 ms |
340 KB |
Output is correct |
25 |
Correct |
3 ms |
340 KB |
Output is correct |
26 |
Correct |
3 ms |
340 KB |
Output is correct |
27 |
Correct |
3 ms |
324 KB |
Output is correct |
28 |
Correct |
3 ms |
340 KB |
Output is correct |
29 |
Correct |
3 ms |
340 KB |
Output is correct |
30 |
Correct |
3 ms |
340 KB |
Output is correct |
31 |
Correct |
4 ms |
340 KB |
Output is correct |
32 |
Correct |
3 ms |
432 KB |
Output is correct |
33 |
Correct |
3 ms |
340 KB |
Output is correct |
34 |
Correct |
156 ms |
364 KB |
Output is correct |
35 |
Correct |
162 ms |
364 KB |
Output is correct |
36 |
Correct |
144 ms |
360 KB |
Output is correct |
37 |
Correct |
137 ms |
364 KB |
Output is correct |
38 |
Correct |
85 ms |
460 KB |
Output is correct |
39 |
Correct |
95 ms |
364 KB |
Output is correct |
40 |
Correct |
87 ms |
360 KB |
Output is correct |
41 |
Correct |
89 ms |
328 KB |
Output is correct |
42 |
Correct |
142 ms |
364 KB |
Output is correct |
43 |
Correct |
113 ms |
376 KB |
Output is correct |
44 |
Correct |
111 ms |
340 KB |
Output is correct |
45 |
Correct |
100 ms |
360 KB |
Output is correct |
46 |
Correct |
108 ms |
360 KB |
Output is correct |
47 |
Correct |
109 ms |
340 KB |
Output is correct |
48 |
Correct |
99 ms |
372 KB |
Output is correct |
49 |
Correct |
83 ms |
360 KB |
Output is correct |
50 |
Correct |
98 ms |
340 KB |
Output is correct |
51 |
Correct |
97 ms |
360 KB |
Output is correct |
52 |
Correct |
119 ms |
340 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
340 KB |
Output is correct |
2 |
Correct |
0 ms |
340 KB |
Output is correct |
3 |
Correct |
1 ms |
340 KB |
Output is correct |
4 |
Correct |
0 ms |
328 KB |
Output is correct |
5 |
Correct |
0 ms |
340 KB |
Output is correct |
6 |
Correct |
0 ms |
340 KB |
Output is correct |
7 |
Correct |
1 ms |
340 KB |
Output is correct |
8 |
Correct |
1 ms |
340 KB |
Output is correct |
9 |
Correct |
0 ms |
340 KB |
Output is correct |
10 |
Correct |
1 ms |
212 KB |
Output is correct |
11 |
Correct |
0 ms |
212 KB |
Output is correct |
12 |
Correct |
1 ms |
340 KB |
Output is correct |
13 |
Correct |
1 ms |
324 KB |
Output is correct |
14 |
Correct |
6 ms |
352 KB |
Output is correct |
15 |
Correct |
4 ms |
340 KB |
Output is correct |
16 |
Correct |
4 ms |
344 KB |
Output is correct |
17 |
Correct |
4 ms |
340 KB |
Output is correct |
18 |
Correct |
3 ms |
340 KB |
Output is correct |
19 |
Correct |
3 ms |
336 KB |
Output is correct |
20 |
Correct |
3 ms |
340 KB |
Output is correct |
21 |
Correct |
3 ms |
340 KB |
Output is correct |
22 |
Correct |
3 ms |
340 KB |
Output is correct |
23 |
Correct |
2 ms |
340 KB |
Output is correct |
24 |
Correct |
3 ms |
340 KB |
Output is correct |
25 |
Correct |
3 ms |
340 KB |
Output is correct |
26 |
Correct |
3 ms |
340 KB |
Output is correct |
27 |
Correct |
3 ms |
324 KB |
Output is correct |
28 |
Correct |
3 ms |
340 KB |
Output is correct |
29 |
Correct |
3 ms |
340 KB |
Output is correct |
30 |
Correct |
3 ms |
340 KB |
Output is correct |
31 |
Correct |
4 ms |
340 KB |
Output is correct |
32 |
Correct |
3 ms |
432 KB |
Output is correct |
33 |
Correct |
3 ms |
340 KB |
Output is correct |
34 |
Correct |
156 ms |
364 KB |
Output is correct |
35 |
Correct |
162 ms |
364 KB |
Output is correct |
36 |
Correct |
144 ms |
360 KB |
Output is correct |
37 |
Correct |
137 ms |
364 KB |
Output is correct |
38 |
Correct |
85 ms |
460 KB |
Output is correct |
39 |
Correct |
95 ms |
364 KB |
Output is correct |
40 |
Correct |
87 ms |
360 KB |
Output is correct |
41 |
Correct |
89 ms |
328 KB |
Output is correct |
42 |
Correct |
142 ms |
364 KB |
Output is correct |
43 |
Correct |
113 ms |
376 KB |
Output is correct |
44 |
Correct |
111 ms |
340 KB |
Output is correct |
45 |
Correct |
100 ms |
360 KB |
Output is correct |
46 |
Correct |
108 ms |
360 KB |
Output is correct |
47 |
Correct |
109 ms |
340 KB |
Output is correct |
48 |
Correct |
99 ms |
372 KB |
Output is correct |
49 |
Correct |
83 ms |
360 KB |
Output is correct |
50 |
Correct |
98 ms |
340 KB |
Output is correct |
51 |
Correct |
97 ms |
360 KB |
Output is correct |
52 |
Correct |
119 ms |
340 KB |
Output is correct |
53 |
Runtime error |
7 ms |
5604 KB |
Execution killed with signal 11 |
54 |
Halted |
0 ms |
0 KB |
- |