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Practice/Implement sigmoid function

Implement sigmoid function

Beginner

Problem Description

Implement the sigmoid function: sigma(x) = 1 / (1 + exp(-x)).

Input: One line with a single number x.

Output: sigmoid(x) rounded to 4 decimal places.

Example:

  • Input: 0
  • Output: 0.5

Input & Output Format

INPUT:
Two lines. First line: space-separated numbers for vector a.
Second line: space-separated numbers for vector b.
OUTPUT:
A single number (the dot product).

Example

Input:
1 2 3
4 5 6
Output:
32
Explanation: 1×4 + 2×5 + 3×6 = 4 + 10 + 18 = 32
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Output

Run or submit to see output.