#include<bits/stdc++.h>
using namespace std;
#pragma GCC optimize ("Ofast")
typedef long long ll;
typedef pair<ll , ll> pll;
const ll maxn = 2e5 + 17;
string s;
vector<ll> a , b;
vector<pll> u;
int main(){
ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
ll n;
cin>>n>>s;
for(ll i = 0 ; i < (n << 1) ; i++){
if(s[i] == 'B'){
a.push_back(i);
} else {
b.push_back(i);
}
}
ll res = 0;
for(ll k = 0 ; k < n ; k++){
u.clear();
for(ll i = 0 ; i < n ; i++){
u.push_back({a[i] , b[(i + k) % n]});
if(u.back().first > u.back().second){
swap(u.back().first , u.back().second);
}
}
ll cur = 0;
for(ll i = 0 ; i < n ; i++){
for(ll j = i + 1 ; j < n ; j++){
bool c = (u[i].first > u[j].first) , d = (u[i].second > u[j].second);
if(c ^ d) continue;
if(c){
cur += (u[i].first < u[j].second);
} else {
cur += (u[j].first < u[i].second);
}
}
}
res = max(res , cur);
}
cout<<res<<'\n';
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
0 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
328 KB |
Output is correct |
| 4 |
Correct |
0 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
212 KB |
Output is correct |
| 6 |
Correct |
0 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
212 KB |
Output is correct |
| 8 |
Correct |
1 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
1 ms |
212 KB |
Output is correct |
| 12 |
Correct |
1 ms |
212 KB |
Output is correct |
| 13 |
Correct |
1 ms |
212 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
0 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
328 KB |
Output is correct |
| 4 |
Correct |
0 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
212 KB |
Output is correct |
| 6 |
Correct |
0 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
212 KB |
Output is correct |
| 8 |
Correct |
1 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
1 ms |
212 KB |
Output is correct |
| 12 |
Correct |
1 ms |
212 KB |
Output is correct |
| 13 |
Correct |
1 ms |
212 KB |
Output is correct |
| 14 |
Correct |
23 ms |
340 KB |
Output is correct |
| 15 |
Correct |
23 ms |
340 KB |
Output is correct |
| 16 |
Correct |
20 ms |
352 KB |
Output is correct |
| 17 |
Correct |
20 ms |
348 KB |
Output is correct |
| 18 |
Correct |
14 ms |
340 KB |
Output is correct |
| 19 |
Correct |
25 ms |
344 KB |
Output is correct |
| 20 |
Correct |
16 ms |
340 KB |
Output is correct |
| 21 |
Correct |
20 ms |
356 KB |
Output is correct |
| 22 |
Correct |
21 ms |
340 KB |
Output is correct |
| 23 |
Correct |
6 ms |
340 KB |
Output is correct |
| 24 |
Correct |
13 ms |
344 KB |
Output is correct |
| 25 |
Correct |
14 ms |
320 KB |
Output is correct |
| 26 |
Correct |
14 ms |
356 KB |
Output is correct |
| 27 |
Correct |
16 ms |
348 KB |
Output is correct |
| 28 |
Correct |
18 ms |
352 KB |
Output is correct |
| 29 |
Correct |
14 ms |
340 KB |
Output is correct |
| 30 |
Correct |
21 ms |
340 KB |
Output is correct |
| 31 |
Correct |
18 ms |
340 KB |
Output is correct |
| 32 |
Correct |
18 ms |
340 KB |
Output is correct |
| 33 |
Correct |
20 ms |
352 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
0 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
328 KB |
Output is correct |
| 4 |
Correct |
0 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
212 KB |
Output is correct |
| 6 |
Correct |
0 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
212 KB |
Output is correct |
| 8 |
Correct |
1 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
1 ms |
212 KB |
Output is correct |
| 12 |
Correct |
1 ms |
212 KB |
Output is correct |
| 13 |
Correct |
1 ms |
212 KB |
Output is correct |
| 14 |
Correct |
23 ms |
340 KB |
Output is correct |
| 15 |
Correct |
23 ms |
340 KB |
Output is correct |
| 16 |
Correct |
20 ms |
352 KB |
Output is correct |
| 17 |
Correct |
20 ms |
348 KB |
Output is correct |
| 18 |
Correct |
14 ms |
340 KB |
Output is correct |
| 19 |
Correct |
25 ms |
344 KB |
Output is correct |
| 20 |
Correct |
16 ms |
340 KB |
Output is correct |
| 21 |
Correct |
20 ms |
356 KB |
Output is correct |
| 22 |
Correct |
21 ms |
340 KB |
Output is correct |
| 23 |
Correct |
6 ms |
340 KB |
Output is correct |
| 24 |
Correct |
13 ms |
344 KB |
Output is correct |
| 25 |
Correct |
14 ms |
320 KB |
Output is correct |
| 26 |
Correct |
14 ms |
356 KB |
Output is correct |
| 27 |
Correct |
16 ms |
348 KB |
Output is correct |
| 28 |
Correct |
18 ms |
352 KB |
Output is correct |
| 29 |
Correct |
14 ms |
340 KB |
Output is correct |
| 30 |
Correct |
21 ms |
340 KB |
Output is correct |
| 31 |
Correct |
18 ms |
340 KB |
Output is correct |
| 32 |
Correct |
18 ms |
340 KB |
Output is correct |
| 33 |
Correct |
20 ms |
352 KB |
Output is correct |
| 34 |
Execution timed out |
2075 ms |
340 KB |
Time limit exceeded |
| 35 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
0 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
328 KB |
Output is correct |
| 4 |
Correct |
0 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
212 KB |
Output is correct |
| 6 |
Correct |
0 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
212 KB |
Output is correct |
| 8 |
Correct |
1 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
1 ms |
212 KB |
Output is correct |
| 12 |
Correct |
1 ms |
212 KB |
Output is correct |
| 13 |
Correct |
1 ms |
212 KB |
Output is correct |
| 14 |
Correct |
23 ms |
340 KB |
Output is correct |
| 15 |
Correct |
23 ms |
340 KB |
Output is correct |
| 16 |
Correct |
20 ms |
352 KB |
Output is correct |
| 17 |
Correct |
20 ms |
348 KB |
Output is correct |
| 18 |
Correct |
14 ms |
340 KB |
Output is correct |
| 19 |
Correct |
25 ms |
344 KB |
Output is correct |
| 20 |
Correct |
16 ms |
340 KB |
Output is correct |
| 21 |
Correct |
20 ms |
356 KB |
Output is correct |
| 22 |
Correct |
21 ms |
340 KB |
Output is correct |
| 23 |
Correct |
6 ms |
340 KB |
Output is correct |
| 24 |
Correct |
13 ms |
344 KB |
Output is correct |
| 25 |
Correct |
14 ms |
320 KB |
Output is correct |
| 26 |
Correct |
14 ms |
356 KB |
Output is correct |
| 27 |
Correct |
16 ms |
348 KB |
Output is correct |
| 28 |
Correct |
18 ms |
352 KB |
Output is correct |
| 29 |
Correct |
14 ms |
340 KB |
Output is correct |
| 30 |
Correct |
21 ms |
340 KB |
Output is correct |
| 31 |
Correct |
18 ms |
340 KB |
Output is correct |
| 32 |
Correct |
18 ms |
340 KB |
Output is correct |
| 33 |
Correct |
20 ms |
352 KB |
Output is correct |
| 34 |
Execution timed out |
2075 ms |
340 KB |
Time limit exceeded |
| 35 |
Halted |
0 ms |
0 KB |
- |
