#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
const int N = (int) 2e5 + 7;
int n;
string s;
vector<int> a;
vector<int> b;
int f(int l, int r, int x)
{
return (l <= x && x <= r);
}
ll get(int k)
{
vector<pair<int, int>> p;
for (int i = 0; i < n; i++)
{
p.push_back({a[i], b[(i + k) % n]});
}
for (auto &it : p)
{
if (it.second < it.first)
{
swap(it.first, it.second);
}
}
sort(p.begin(), p.end());
ll sol = 0;
for (int i = 0; i < (int) p.size(); i++)
{
for (int j = 0; j < i; j++)
{
sol += (p[i].first <= p[j].second && p[j].second <= p[i].second);
}
}
return sol;
}
int main()
{
ios::sync_with_stdio(0);
cin.tie(0);
cin >> n >> s;
for (int i = 0; i < 2 * n; i++)
{
if (s[i] == 'W')
{
a.push_back(i);
}
else
{
b.push_back(i);
}
}
ll sol = 0;
for (int k = 0; k < n; k++)
{
sol = max(sol, get(k));
}
cout << sol << "\n";
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
384 KB |
Output is correct |
2 |
Correct |
1 ms |
384 KB |
Output is correct |
3 |
Correct |
1 ms |
384 KB |
Output is correct |
4 |
Correct |
1 ms |
384 KB |
Output is correct |
5 |
Correct |
0 ms |
384 KB |
Output is correct |
6 |
Correct |
0 ms |
384 KB |
Output is correct |
7 |
Correct |
1 ms |
384 KB |
Output is correct |
8 |
Correct |
1 ms |
384 KB |
Output is correct |
9 |
Correct |
0 ms |
384 KB |
Output is correct |
10 |
Correct |
1 ms |
384 KB |
Output is correct |
11 |
Correct |
0 ms |
384 KB |
Output is correct |
12 |
Correct |
1 ms |
384 KB |
Output is correct |
13 |
Correct |
1 ms |
384 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
384 KB |
Output is correct |
2 |
Correct |
1 ms |
384 KB |
Output is correct |
3 |
Correct |
1 ms |
384 KB |
Output is correct |
4 |
Correct |
1 ms |
384 KB |
Output is correct |
5 |
Correct |
0 ms |
384 KB |
Output is correct |
6 |
Correct |
0 ms |
384 KB |
Output is correct |
7 |
Correct |
1 ms |
384 KB |
Output is correct |
8 |
Correct |
1 ms |
384 KB |
Output is correct |
9 |
Correct |
0 ms |
384 KB |
Output is correct |
10 |
Correct |
1 ms |
384 KB |
Output is correct |
11 |
Correct |
0 ms |
384 KB |
Output is correct |
12 |
Correct |
1 ms |
384 KB |
Output is correct |
13 |
Correct |
1 ms |
384 KB |
Output is correct |
14 |
Correct |
25 ms |
384 KB |
Output is correct |
15 |
Correct |
22 ms |
384 KB |
Output is correct |
16 |
Correct |
21 ms |
404 KB |
Output is correct |
17 |
Correct |
22 ms |
384 KB |
Output is correct |
18 |
Correct |
12 ms |
396 KB |
Output is correct |
19 |
Correct |
14 ms |
384 KB |
Output is correct |
20 |
Correct |
14 ms |
384 KB |
Output is correct |
21 |
Correct |
13 ms |
384 KB |
Output is correct |
22 |
Correct |
15 ms |
384 KB |
Output is correct |
23 |
Correct |
7 ms |
384 KB |
Output is correct |
24 |
Correct |
12 ms |
384 KB |
Output is correct |
25 |
Correct |
12 ms |
384 KB |
Output is correct |
26 |
Correct |
14 ms |
384 KB |
Output is correct |
27 |
Correct |
15 ms |
384 KB |
Output is correct |
28 |
Correct |
17 ms |
384 KB |
Output is correct |
29 |
Correct |
12 ms |
384 KB |
Output is correct |
30 |
Correct |
12 ms |
384 KB |
Output is correct |
31 |
Correct |
16 ms |
384 KB |
Output is correct |
32 |
Correct |
16 ms |
384 KB |
Output is correct |
33 |
Correct |
18 ms |
404 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
384 KB |
Output is correct |
2 |
Correct |
1 ms |
384 KB |
Output is correct |
3 |
Correct |
1 ms |
384 KB |
Output is correct |
4 |
Correct |
1 ms |
384 KB |
Output is correct |
5 |
Correct |
0 ms |
384 KB |
Output is correct |
6 |
Correct |
0 ms |
384 KB |
Output is correct |
7 |
Correct |
1 ms |
384 KB |
Output is correct |
8 |
Correct |
1 ms |
384 KB |
Output is correct |
9 |
Correct |
0 ms |
384 KB |
Output is correct |
10 |
Correct |
1 ms |
384 KB |
Output is correct |
11 |
Correct |
0 ms |
384 KB |
Output is correct |
12 |
Correct |
1 ms |
384 KB |
Output is correct |
13 |
Correct |
1 ms |
384 KB |
Output is correct |
14 |
Correct |
25 ms |
384 KB |
Output is correct |
15 |
Correct |
22 ms |
384 KB |
Output is correct |
16 |
Correct |
21 ms |
404 KB |
Output is correct |
17 |
Correct |
22 ms |
384 KB |
Output is correct |
18 |
Correct |
12 ms |
396 KB |
Output is correct |
19 |
Correct |
14 ms |
384 KB |
Output is correct |
20 |
Correct |
14 ms |
384 KB |
Output is correct |
21 |
Correct |
13 ms |
384 KB |
Output is correct |
22 |
Correct |
15 ms |
384 KB |
Output is correct |
23 |
Correct |
7 ms |
384 KB |
Output is correct |
24 |
Correct |
12 ms |
384 KB |
Output is correct |
25 |
Correct |
12 ms |
384 KB |
Output is correct |
26 |
Correct |
14 ms |
384 KB |
Output is correct |
27 |
Correct |
15 ms |
384 KB |
Output is correct |
28 |
Correct |
17 ms |
384 KB |
Output is correct |
29 |
Correct |
12 ms |
384 KB |
Output is correct |
30 |
Correct |
12 ms |
384 KB |
Output is correct |
31 |
Correct |
16 ms |
384 KB |
Output is correct |
32 |
Correct |
16 ms |
384 KB |
Output is correct |
33 |
Correct |
18 ms |
404 KB |
Output is correct |
34 |
Execution timed out |
2072 ms |
384 KB |
Time limit exceeded |
35 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
384 KB |
Output is correct |
2 |
Correct |
1 ms |
384 KB |
Output is correct |
3 |
Correct |
1 ms |
384 KB |
Output is correct |
4 |
Correct |
1 ms |
384 KB |
Output is correct |
5 |
Correct |
0 ms |
384 KB |
Output is correct |
6 |
Correct |
0 ms |
384 KB |
Output is correct |
7 |
Correct |
1 ms |
384 KB |
Output is correct |
8 |
Correct |
1 ms |
384 KB |
Output is correct |
9 |
Correct |
0 ms |
384 KB |
Output is correct |
10 |
Correct |
1 ms |
384 KB |
Output is correct |
11 |
Correct |
0 ms |
384 KB |
Output is correct |
12 |
Correct |
1 ms |
384 KB |
Output is correct |
13 |
Correct |
1 ms |
384 KB |
Output is correct |
14 |
Correct |
25 ms |
384 KB |
Output is correct |
15 |
Correct |
22 ms |
384 KB |
Output is correct |
16 |
Correct |
21 ms |
404 KB |
Output is correct |
17 |
Correct |
22 ms |
384 KB |
Output is correct |
18 |
Correct |
12 ms |
396 KB |
Output is correct |
19 |
Correct |
14 ms |
384 KB |
Output is correct |
20 |
Correct |
14 ms |
384 KB |
Output is correct |
21 |
Correct |
13 ms |
384 KB |
Output is correct |
22 |
Correct |
15 ms |
384 KB |
Output is correct |
23 |
Correct |
7 ms |
384 KB |
Output is correct |
24 |
Correct |
12 ms |
384 KB |
Output is correct |
25 |
Correct |
12 ms |
384 KB |
Output is correct |
26 |
Correct |
14 ms |
384 KB |
Output is correct |
27 |
Correct |
15 ms |
384 KB |
Output is correct |
28 |
Correct |
17 ms |
384 KB |
Output is correct |
29 |
Correct |
12 ms |
384 KB |
Output is correct |
30 |
Correct |
12 ms |
384 KB |
Output is correct |
31 |
Correct |
16 ms |
384 KB |
Output is correct |
32 |
Correct |
16 ms |
384 KB |
Output is correct |
33 |
Correct |
18 ms |
404 KB |
Output is correct |
34 |
Execution timed out |
2072 ms |
384 KB |
Time limit exceeded |
35 |
Halted |
0 ms |
0 KB |
- |