Problem Description

High-precision subtraction.

Input Format

Two integers $a,b$ (the second one may be larger than the first one).

Output Format

The result (output a minus sign if it is negative).

2
1

1

Hint

• $20\%$ of the testdata: $a,b$ are within the range of long long.
• $100\%$ of the testdata: $0<a,b\le 10^{10086}$.

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