OJ Board

Posted: **Wed Feb 11, 2015 11:12 am**

this problem seems easy but i can not understand this line of the problem

(3) all the X-coordinates are pair-wise distinct;

.
what does this mean and can anyone help me to understand this problem????

thanks in advanced

Posted: **Wed Feb 11, 2015 9:22 pm**

No two X-coordinates are the same.

920 - Sunny Mountains