Types: N: int, x_{i,j}: int, y_{i,j}: int  
Ranges: 2 ≤ N ≤ 10^5, 0 ≤ x_{i,j}, y_{i,j} ≤ 100  
Addtl Info: (x_{i,1}, y_{i,1}) ≠ (x_{i,2}, y_{i,2})