Multiply

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문제 설명

예제2

문제

Write a program that computes a product of two non-negative integers A and B. The integers are represented in decimal notation and have N and M digits, respectively.

입력

The first line contains the lengths N and M, separated by a space. A is given on the second and B on the third line. The numbers will not have leading zeros.

출력

Output the product of A and B without leading zeros.

제한

1 ≤ N, M ≤ 50 000