Identify Triangle

06 May, 2021

Problem

Given three bars of different lengths (A, B, C), “YES” is output if these three bars can form a triangle, and “NO” if they cannot be made.

input

The first line gives you 100 different lengths of bars A, B, and C.

6, 7, 11

13, 33, 17

output

Print “YES” and “NO” on the first line.

YES

NO

Solution

using `if`

function solution(a, b, c) {
	let answer = 'yes',
		max;
	let sum = a + b + c;

	if (a > b) max = a;
	else max = b;
	if (c > max) max = c;

	if (sum - max < max) answer = 'no';

	return answer;
}

using `sort()`

function solution(a, b, c) {
	let arr = [a, b, c];
	let answer = 'yes';
	arr.sort((a, b) => a - b);

	if (arr[0] + arr[1] <= arr[2]) answer = 'no';
	return answer;
}

using `Math.min()`

function solution(a, b, c) {
	let answer = 'yes';
	let sum = a + b + c;
	let max = Math.max(a, b, c);

	if (sum - max <= max) answer = 'no';
	return answer;
}