Monistus

mrkjono = input()

test = 50000

i = 0
while i<len(mrkjono):
    if mrkjono[i].isdigit():
        s = mrkjono[(i + 1):(i + 1 + int(mrkjono[i]))]
        if test-len(mrkjono)<len(s):
            mrkjono = (mrkjono.replace(mrkjono[i], s, 1))[:test+1]
        else:
            mrkjono = mrkjono.replace(mrkjono[i], s, 1)
    else:
        i += 1
if len(mrkjono) > test:
    print(mrkjono[:(len(mrkjono)-1)])
else:
    print(mrkjono)

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 1, 2

Verdict: ACCEPTED

Test 3

Group: 1, 2

Verdict: ACCEPTED

Test 4

Group: 1, 2

Verdict: ACCEPTED

Test 5

Group: 1, 2

Verdict: ACCEPTED

Test 6

Group: 1, 2

Verdict: ACCEPTED

Test 7

Group: 1, 2

Verdict: ACCEPTED

Test 8

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 9

Group: 2

Verdict: WRONG ANSWER

Test 10

Group: 2

Verdict: WRONG ANSWER

Test 11

Group: 2

Verdict: WRONG ANSWER

Test 12

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 13

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 14

Group: 2

Verdict: TIME LIMIT EXCEEDED