comefrom: <awangdev>51. N-Queens_1.java
code: private boolean validate(int[] columns, int row, int col) {
  
          for (int newRow = 0; newRow < row; newRow++) {
              int newCol = columns[newRow];
              if (col == newCol || (Math.abs(row - newRow) == Math.abs(col - newCol))) {
                  return false;
              }
          }
          return true;
      }
masked: private boolean var_0 ( int [ ] var_1 , int var_2 , int var_3 ) {
    for ( int var_4 = 0 ;
    var_4 < var_2 ;
    var_4 ++ ) {
      int var_5 = var_1 [ var_4 ] ;
      if ( var_3 == var_5 || ( Math . abs ( var_2 - var_4 ) == Math . abs ( var_3 - var_5 ) ) ) {
        return false ;
      }
    }
    return true ;
  }
  