Parse the Number

Difficulty: 1200 2000 ms 128 MB

implementation strings

Parse a leading integer from the string: skip leading spaces, read an optional sign, then digits; stop at the first non-digit. Clamp the result to 32-bit signed range [−2³¹, 2³¹−1]. Print 0 if no digits were read.

Input: one line with the raw string.

Output: the parsed (and clamped) value.

Constraints:

• 1 ≤ length ≤ 100

Sample Tests

   -42

-42

4193 with words

4193

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