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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. int main()
  4. {
  5.     int t;
  6.     cin>>t;
  7.     while(t--)
  8.     {
  9.         int n,k;
  10.         cin>>n>>k;
  11.         int prefix[n],dt[n];
  12.         for(int i=0;i<n;i++)
  13.             prefix[i]=0;
  14.         string s;
  15.         cin>>s;
  16.         for(int i=0;i<s.length();i++)
  17.         { if(s[i]=='R')
  18.         dt[i]=0;
  19.         else dt[i]=1;
  20.  
  21.         }
  22.         int hakuka=0,ans=0;
  23.       for(int i=0;i<n;i++)
  24.       {  hakuka+=prefix[i];
  25.       	dt[i]=(dt[i]+hakuka)%2;
  26.           if(dt[i]==0)
  27.       {
  28.           prefix[i]=1;
  29.           if(i+k<n)
  30.             prefix[i+k]=-1;
  31.           ans++;
  32.           hakuka+=prefix[i];
  33.       }
  34.  
  35.  
  36.  
  37.       }
  38.       cout<<ans<<endl;
  39.  
  40.     }
  41.  
  42. }
  43.  
Success #stdin #stdout 0s 3276KB
comments (?)
stdin
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1
7 3
RGGRGRG
stdout
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4
https://ideone.com/VDOf6h
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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