XCTF get_post

Topic Description: the X-teacher told the students Xiao Ning HTTP request methods usually use two, you know what two do?

 

According to the topic I GET submit an a = 1, the beginning, I used the hackbar submit a = 1 results did not respond. . . Then after ur add /? A = 1 display

This time again hackbar submitted b = 2, you can get flag

Flag can be obtained as follows:

cyberpeace{7c0eff28f68486cc92acea2d13c6fb09}