A TIMES B!

from sys import argv


def convolve(F, G):
    NF = len(F)
    NG = len(G)
    N = NF + NG - 1
    C = [0 for _ in range(N)]
    s = 0
    for i in range(N):
        for j in range(max(0, i - NG), i + 1):
            if j < NF and (i - j) < NG:
                s += F[j] * G[i - j]
        C[i] = s
        s = 0
    return C


def carry(data):
    """Perform carrying, meaning that
    the "number" [2, 17, 5] becomes [3, 7, 5].
    """
    change = 1
    while change:
        change = 0
        cp = [0 for _ in data]
        for idx, e in enumerate(data):
            if e >= 10:
                change = 1
                car = e // 10
                cp[idx - 1] += car
                cp[idx] = e - (car * 10)
            else:
                cp[idx] = e
        data = cp
    return cp


if __name__ == "__main__":
    a = input()
    b = input()
    x, y = [int(e) for e in a], [int(e) for e in b]
    #print(f"{x=}\n{y=}")
    C = convolve(x, y)
    #print(f"{C=}")
    M = carry(C)
    strM = "".join([str(e) for e in M])
    print(f"{b[0]+strM}")

Test 1

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Test 2

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Test 3

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Test 4

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Test 6

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Test 8

Verdict: ACCEPTED

Test 9

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Test 10

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Test 20

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Test 21

Verdict: ACCEPTED

Test 22

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Test 24

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Test 28

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Test 30

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Test 31

Verdict: ACCEPTED

Test 32

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Test 35

Verdict: ACCEPTED

Test 36

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Test 38

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Test 39

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Test 40

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Test 42

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Test 43

Verdict: ACCEPTED

Test 44

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Test 45

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Test 46

Verdict: ACCEPTED

Test 47

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Test 48

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Test 52

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Test 53

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Test 56

Verdict: TIME LIMIT EXCEEDED

Test 57

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Test 60

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Test 62

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Test 63

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Test 64

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Test 65

Verdict: TIME LIMIT EXCEEDED