2379. Minimum Recolors to Get K Consecutive Black Blocks

class Solution {
public:
    int minimumRecolors(string blocks, int k) 
    {
        int cnt = 0;
        int mini = INT_MAX;

        for(int i=0; i<=blocks.size()-k; i++)
        {
            cnt=0;
            for(int j=i; j<(i+k); j++)
            {
                if(blocks[j]=='W')
                   cnt++;
            }
            
            mini = min(cnt, mini);
        }
        return mini;
    }
};