static void spiralFill ( int m , int n , int a [ ] [ ] ) {
  int val = 1 ;
  int k = 0 , l = 0 ;
  while ( k < m && l < n ) {
    for ( int i = l ;
    i < n ;
    ++ i ) {
      a [ k ] [ i ] = val ++ ;
    }
    k ++ ;
    for ( int i = k ;
    i < m ;
    ++ i ) {
      a [ i ] [ n - 1 ] = val ++ ;
    }
    n -- ;
    if ( k < m ) {
      for ( int i = n - 1 ;
      i >= l ;
      -- i ) {
        a [ m - 1 ] [ i ] = val ++ ;
      }
      m -- ;
    }
    if ( l < n ) {
      for ( int i = m - 1 ;
      i >= k ;
      -- i ) {
        a [ i ] [ l ] = val ++ ;
      }
      l ++ ;
    }
  }
}

static void spiralFill ( int m , int n , int a [ ] [ ] ) { int val = 1 ; int k = 0 , l = 0 ; while ( k < m && l < n ) { for ( int i = l ; i < n ; ++ i ) { a [ k ] [ i ] = val ++ ; } k ++ ; for ( int i = k ; i < m ; ++ i ) { a [ i ] [ n - 1 ] = val ++ ; } n -- ; if ( k < m ) { for ( int i = n - 1 ; i >= l ; -- i ) { a [ m - 1 ] [ i ] = val ++ ; } m -- ; } if ( l < n ) { for ( int i = m - 1 ; i >= k ; -- i ) { a [ i ] [ l ] = val ++ ; } l ++ ; } } }
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