comefrom: <awangdev>207. Course Schedule_1.java
code: private boolean validateInput(int numCourses, int[][] prerequisites) {
  
          return numCourses == 0 || prerequisites == null || prerequisites.length == 0
              || prerequisites[0] == null || prerequisites[0].length == 0;
      }
masked: private boolean var_0 ( int var_1 , int [ ] [ ] var_2 ) {
    return var_1 == 0 || var_2 == null || var_2 . length == 0 || var_2 [ 0 ] == null || var_2 [ 0 ] . length == 0 ;
  }
  