Original Writeup on seall.dev

We have a string of numbers seperated by spaces, we need to remove duplicated and keep the first instance, same order.

String Input: 7 3 7 9 1 3 5 9

String Expected Output: 7 3 9 1 5

# take in the number
n = input()

# calculate answer
n = n.split()

out = list()

for i in n:
    if i not in out:
        out.append(i)

# print answer
print(' '.join(out))

Flag: HTB{r3m0v1ng_dup5_15_s0_345y_1F_y0u_kn0w_h0w_t0_c0d3!_39fc50047f44d15a5f103b58ea7d2056}