two-sum

wget https://artifacts.picoctf.net/c/456/flag.c

Then cat flag.c to look at the source code. You can see to get the flag it wants you to add to positive integers to create integer overflow. If you add to big of a number it wont process. To do this you need to know the maximum integer value which is 2147483647. If you add 2147483647 and 2147483647 then you get the flag.

Flag: picoCTF{Tw0_Sum_Integer_Bu773R_0v3rf...8bd}