Given a and b which both fit in 64-bit signed integers, find ⌊ a／b⌋ where ⌊x⌋ denotes the largest integer which
is not larger than x.

The input contains zero or more test cases and is terminated by end-of-file.
Each test case contains two integers a, b.
• −2⁶³ ≤ a, b < 2⁶³
• b ≠ 0
• The number of tests cases does not exceed 10⁴.

For each case, output an integer which denotes the result.

3 2
3 -2
-9223372036854775808 1
-9223372036854775808 -1

1
-2
-9223372036854775808
9223372036854775808

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