static void findMinAvgSubarray ( int n , int k ) {
  if ( n < k ) return ;
  int res_index = 0 ;
  int curr_sum = 0 ;
  for ( int i = 0 ;
  i < k ;
  i ++ ) curr_sum += arr [ i ] ;
  int min_sum = curr_sum ;
  for ( int i = k ;
  i < n ;
  i ++ ) {
    curr_sum += arr [ i ] - arr [ i - k ] ;
    if ( curr_sum < min_sum ) {
      min_sum = curr_sum ;
      res_index = ( i - k + 1 ) ;
    }
  }
  System . out . println ( "Subarray between [" + res_index + ", " + ( res_index + k - 1 ) + "] has minimum average" ) ;
}

static void findMinAvgSubarray ( int n , int k ) { if ( n < k ) return ; int res_index = 0 ; int curr_sum = 0 ; for ( int i = 0 ; i < k ; i ++ ) curr_sum += arr [ i ] ; int min_sum = curr_sum ; for ( int i = k ; i < n ; i ++ ) { curr_sum += arr [ i ] - arr [ i - k ] ; if ( curr_sum < min_sum ) { min_sum = curr_sum ; res_index = ( i - k + 1 ) ; } } System . out . println ( " Subarray ▁ between ▁ [ " + res_index + " , ▁ " + ( res_index + k - 1 ) + " ] ▁ has ▁ minimum ▁ average " ) ; }
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