Class photos Greedy Method

ClassPhotos.js

function classPhotos(redShirtHeights, blueShirtHeights) {
	// Sort by height the students Log(n)
	redShirtHeights.sort((a, b) => a - b)
	blueShirtHeights.sort((a, b) => a - b)
	
	// Pick up who's going to be the backrow
	const backColor = (redShirtHeights[0] > blueShirtHeights[0]) ? "RED" : "BLUE"
	
	// compare every classmate and validate it's possible
	for (let i = 0; i < redShirtHeights.length; i++) {
		// validate for red in the back
		if (backColor == "RED") {
			if (blueShirtHeights[i] >= redShirtHeights[i]) {
				return false
			}
		} else {
			// validate in blue in the back
			if (redShirtHeights[i] >= blueShirtHeights[i]) {
				return false
			}
		}
	}
  return true;
}

// Do not edit the line below.
exports.classPhotos = classPhotos;