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  1. #include<bits/stdc++.h>
  2. #define IO ios_base::sync_with_stdio(),cin.tie(0),cout.tie(0) ;
  3. #define ll long long
  4. using namespace std;
  5. const int N = 2e5 + 4 ;
  6. int n , k , a[N] , ans ;
  7. bool state[N] ;
  8. int main() {
  9.     IO ;
  10.     cin>>n>>k ;
  11.     for(int i=1 ; i <= n ; i++)
  12.         cin>>a[i] ;
  13.     for(int i=1 ; i <= n ; i++)
  14.         cin>>state[i] ;
  15.     for(int i=1 ; i <= n ; i++)
  16.     {
  17.         if(state[i] == 1)
  18.         {
  19.             ans += a[i] ;
  20.             a[i] = 0 ;
  21.         }
  22.     }
  23.     for(int i=1; i <= n ; i++)
  24.         a[i] += a[i-1] ;
  25.     int mx = 0 ;
  26.     for(int i = k ; i <= n ; i++)
  27.     {
  28.         mx = max(mx , a[i] - a[i - k]) ;
  29.     }
  30.     cout<<ans + mx<<'\n' ;
  31.     return 0;
  32. }
Success #stdin #stdout 0.01s 5548KB
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stdout 
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https://ideone.com/lwp4TQ
language:
C++14 (gcc 8.3)
created:
2 years ago
visibility:
public

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