misc/addition

100 points

Writeup by Aryan

This is the source code we are provided with.

import time
import random

questions = int(input("how many questions do you want to answer? "))

for i in range(questions):
    a = random.randint(0, 10)
    b = random.randint(0, 10)

    yourans = int(input("what is " + str(a) + ' + ' + str(b) + ' = '))

    print("calculating")

    totaltime = pow(2, i)

    print('.')
    time.sleep(totaltime / 3)
    print('.')
    time.sleep(totaltime / 3)
    print('.')
    time.sleep(totaltime / 3)

    if yourans != a + b:
        print("You made my little brother cry 😭")
        exit(69)

f = open('/flag.txt', 'r')
flag = f.read()
print(flag[:questions])

If we want to solve -1 questions, then we can get the flag for free!

The for loop will never execute, and printing flag[:-1] will give us all the characters except the last one (which is probably a newline).

Flag: n00bz{m4th_15nt_4ll_4b0ut_3qu4t10n5}