TASK

Problem

#18

Given base `a` and height `h`, print triangle area.

EXAMPLE

Example

Input

10 6

Output

30.0

LIMITS

Constraints

a > 0; h > 0

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LEARN Theory for this problem

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### Triangle Area

`if / else if / else` chooses a branch from boolean conditions. Comparisons such as `<`, `>=`, `===` and logical operators `&&`, `||`, `!` combine the exact rules that decide which output is valid.

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NEED HELP? Hints

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['Translate every case from the statement into a boolean condition before writing branches.', 'Separate input parsing, result computation, and output into distinct steps so errors are easier to spot.']

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ANSWER Solution

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const fs = require('fs');
const input = fs.readFileSync(0, 'utf8').trimEnd();
let [a, h] = input.trim().split(/\s+/).filter(Boolean).map(Number);
let result = (a * h / 2);
console.log(Number.isInteger(result) ? result.toFixed(1) : result);