#include <bits/stdc++.h>
#define x first
#define y second
#define pii pair<int,int>
#define ll long long
#define pll pair<ll,ll>
#define pbb pair<bool,bool>
#define mp make_pair
#define pb push_back
#define pf push_front
#define popb pop_back
#define popf pop_front
#define xmod (ll)(1e9+7)
#define hmod 1286031825167LL
using namespace std;
int n,k,len,pt1,pt2,sum,ans;
string s;
vector <int> pos[5];
int main(){
ios::sync_with_stdio(false);
cin >> n >> k >> s; len=s.length();
for (int i=0;i<len;i++){
if (s[i] == 'J')
pos[0].pb(i);
if (s[i] == 'O')
pos[1].pb(i);
if (s[i] == 'I')
pos[2].pb(i);
}
ans=1e9;
if (k-1 > (int)pos[1].size()-1 && k-1 > (int)pos[2].size()-1 && k-1 > (int)pos[0].size()-1){
cout << "-1\n";
return 0;
}
for (int i=1;i<=k-1;i++){
sum+=pos[0][i]-pos[0][i-1]-1;
sum+=pos[1][i]-pos[1][i-1]-1;
sum+=pos[2][i]-pos[2][i-1]-1;
}
pt1=k-1; pt2=k-1;
for (int i=k-1;i<(int)pos[0].size();i++){
while (pt1 < (int)pos[1].size() && pos[1][pt1-(k-1)] < pos[0][i]){
sum-=(pos[1][pt1-(k-2)]-pos[1][pt1-(k-1)]-1);
pt1++;
if (pt1 == (int)pos[1].size())
goto out;
sum+=(pos[1][pt1]-pos[1][pt1-1]-1);
}
while (pt2 < (int)pos[2].size() && pos[2][pt2-(k-1)] < pos[1][pt1]){
sum-=(pos[2][pt2-(k-2)]-pos[2][pt2-(k-1)]-1);
pt2++;
if (pt2 == (int)pos[2].size())
goto out;
sum+=(pos[2][pt2]-pos[2][pt2-1]-1);
}
ans=min(ans,sum);
}
out:;
if (ans == 1e9)
cout << "-1\n";
else
cout << ans << "\n";
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
364 KB |
Output is correct |
| 2 |
Incorrect |
1 ms |
364 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
364 KB |
Output is correct |
| 2 |
Incorrect |
1 ms |
364 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
364 KB |
Output is correct |
| 2 |
Incorrect |
1 ms |
364 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
