static void printSumSimple ( int mat [ ] [ ] , int k ) {
  if ( k > n ) return ;
  for ( int i = 0 ;
  i < n - k + 1 ;
  i ++ ) {
    for ( int j = 0 ;
    j < n - k + 1 ;
    j ++ ) {
      int sum = 0 ;
      for ( int p = i ;
      p < k + i ;
      p ++ ) for ( int q = j ;
      q < k + j ;
      q ++ ) sum += mat [ p ] [ q ] ;
      System . out . print ( sum + " " ) ;
    }
    System . out . println ( ) ;
  }
}

static void printSumSimple ( int mat [ ] [ ] , int k ) { if ( k > n ) return ; for ( int i = 0 ; i < n - k + 1 ; i ++ ) { for ( int j = 0 ; j < n - k + 1 ; j ++ ) { int sum = 0 ; for ( int p = i ; p < k + i ; p ++ ) for ( int q = j ; q < k + j ; q ++ ) sum += mat [ p ] [ q ] ; System . out . print ( sum + " ▁ " ) ; } System . out . println ( ) ; } }
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