TLE on Train Schedule

import random

def test():
    n = 100000
    x = [random.randint(1,n) for i in range(n)]
    y = str(x).replace(",", "")
    return str(n) + \
            str(y)[:-1]



if __name__ == "__main__":
    res = test()
    print(res)

Test 1

Verdict: WRONG ANSWER