#include <bits/stdc++.h>
using namespace std;
const int N = 2e5 + 12, MOD = 1e9 + 7;
typedef long long ll;
int n,k,A[N],B[N],C[N];
string s;
vector<int> a,b,c;
void test(){
cin >> n >> k >> s;
s = "#" + s;
for(int i = 1;i <= n;i++){
A[i] = A[i - 1];
B[i] = B[i - 1];
C[i] = C[i - 1];
if(s[i] == 'J'){
A[i]++;
a.push_back(i);
}else if(s[i] == 'O'){
B[i]++;
b.push_back(i);
}else{
C[i]++;
c.push_back(i);
}
}
if(min({(int)a.size(),(int)b.size(),(int)c.size()}) < k){
cout << -1 << '\n';
return;
}
int l = a[k - 1],r = c[(int)c.size() - k];
if(B[r] - B[l] < k){
cout << -1 << '\n';
return;
}
int L = 0,R = (int)c.size() - 1,res = 1e9;
while(true){
res = min(res,n - k * 3 - (a[L] - 1) + (n - c[R]));
if(L + k < (int)a.size() && B[c[R - k + 1]] - B[a[L + k]] >= k){
L++;
}else if(R - k >= 0 && B[c[R - k]] - B[a[L + k - 1]] >= k){
R--;
}else break;
}
if(res == 1e9) res = -1;
cout<< res << '\n';
}
int main()
{
ios_base::sync_with_stdio(0);cin.tie(0);
int T = 1;
// cin >> T;
while (T--)
test();
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
344 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
344 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
344 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |