#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
using pi = pair<pair<int, int>, pair<int, int>>;
#define ff first
#define ss second
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define lb lower_bound
#define int ll
int N, P[50];
vector<int> A, B;
string S;
int32_t main() {
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
cin >> N >> S; N *= 2;
for(int l = 0; l < N; l++) {
if(S[l] == 'B') A.push_back(l);
if(S[l] == 'W') B.push_back(l);
}
int res = 0;
do{
for(int l = 0; l < N; l++) P[l] = l;
int ans = 0;
for(int i = 0; i < N / 2; i++) {
int U = A[i], V = B[i];
for(int j = min(U, V); j <= max(U, V); j++) {
ans += (P[j] < min(U, V) || P[j] > max(U, V));
}
P[U] = V, P[V] = U;
}
res = max(res, ans);
} while(next_permutation(B.begin(), B.end()));
cout << res << "\n";
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
320 KB |
Output is correct |
3 |
Correct |
1 ms |
212 KB |
Output is correct |
4 |
Correct |
1 ms |
212 KB |
Output is correct |
5 |
Correct |
0 ms |
212 KB |
Output is correct |
6 |
Correct |
1 ms |
212 KB |
Output is correct |
7 |
Correct |
1 ms |
316 KB |
Output is correct |
8 |
Correct |
1 ms |
212 KB |
Output is correct |
9 |
Correct |
6 ms |
324 KB |
Output is correct |
10 |
Correct |
6 ms |
324 KB |
Output is correct |
11 |
Correct |
6 ms |
212 KB |
Output is correct |
12 |
Correct |
6 ms |
212 KB |
Output is correct |
13 |
Correct |
5 ms |
212 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
320 KB |
Output is correct |
3 |
Correct |
1 ms |
212 KB |
Output is correct |
4 |
Correct |
1 ms |
212 KB |
Output is correct |
5 |
Correct |
0 ms |
212 KB |
Output is correct |
6 |
Correct |
1 ms |
212 KB |
Output is correct |
7 |
Correct |
1 ms |
316 KB |
Output is correct |
8 |
Correct |
1 ms |
212 KB |
Output is correct |
9 |
Correct |
6 ms |
324 KB |
Output is correct |
10 |
Correct |
6 ms |
324 KB |
Output is correct |
11 |
Correct |
6 ms |
212 KB |
Output is correct |
12 |
Correct |
6 ms |
212 KB |
Output is correct |
13 |
Correct |
5 ms |
212 KB |
Output is correct |
14 |
Execution timed out |
2066 ms |
340 KB |
Time limit exceeded |
15 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
320 KB |
Output is correct |
3 |
Correct |
1 ms |
212 KB |
Output is correct |
4 |
Correct |
1 ms |
212 KB |
Output is correct |
5 |
Correct |
0 ms |
212 KB |
Output is correct |
6 |
Correct |
1 ms |
212 KB |
Output is correct |
7 |
Correct |
1 ms |
316 KB |
Output is correct |
8 |
Correct |
1 ms |
212 KB |
Output is correct |
9 |
Correct |
6 ms |
324 KB |
Output is correct |
10 |
Correct |
6 ms |
324 KB |
Output is correct |
11 |
Correct |
6 ms |
212 KB |
Output is correct |
12 |
Correct |
6 ms |
212 KB |
Output is correct |
13 |
Correct |
5 ms |
212 KB |
Output is correct |
14 |
Execution timed out |
2066 ms |
340 KB |
Time limit exceeded |
15 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
320 KB |
Output is correct |
3 |
Correct |
1 ms |
212 KB |
Output is correct |
4 |
Correct |
1 ms |
212 KB |
Output is correct |
5 |
Correct |
0 ms |
212 KB |
Output is correct |
6 |
Correct |
1 ms |
212 KB |
Output is correct |
7 |
Correct |
1 ms |
316 KB |
Output is correct |
8 |
Correct |
1 ms |
212 KB |
Output is correct |
9 |
Correct |
6 ms |
324 KB |
Output is correct |
10 |
Correct |
6 ms |
324 KB |
Output is correct |
11 |
Correct |
6 ms |
212 KB |
Output is correct |
12 |
Correct |
6 ms |
212 KB |
Output is correct |
13 |
Correct |
5 ms |
212 KB |
Output is correct |
14 |
Execution timed out |
2066 ms |
340 KB |
Time limit exceeded |
15 |
Halted |
0 ms |
0 KB |
- |