[pull] master from TheAlgorithms:master #73

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Expand Up		@@ -25,7 +25,7 @@ jobs:
		run: npm run test

		- name: 💄 Code style
	run: npm run style
	run: npm run check-style

		codespell:
		name: Check for spelling errors
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24 changes: 12 additions & 12 deletions Backtracking/MColoringProblem.js

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Expand Up		@@ -6,44 +6,44 @@
		* @see https://en.wikipedia.org/wiki/Graph_coloring
		*/
		function mColoring(graph, m) {
	const colors = new Array(graph.length).fill(0);
	const colors = new Array(graph.length).fill(0)

		// Check if it's safe to color a vertex with a given color.
		function isSafe(vertex, color) {
		for (let i = 0; i < graph.length; i++) {
		if (graph[vertex][i] && colors[i] === color) {
	return false;
	return false
		}
		}
	return true;
	return true
		}

		// Use backtracking to try and color the graph.
		function solveColoring(vertex = 0) {
		if (vertex === graph.length) {
	return true;
	return true
		}

		for (let color = 1; color <= m; color++) {
		if (isSafe(vertex, color)) {
	colors[vertex] = color;

	colors[vertex] = color

		if (solveColoring(vertex + 1)) {
	return true;
	return true
		}

		// If no solution, backtrack.
	colors[vertex] = 0;
	colors[vertex] = 0
		}
		}
	return false;
	return false
		}

		// If coloring is possible, return the colors.
		if (solveColoring()) {
	return colors;
	return colors
		}
	return null;
	return null
		}

	export { mColoring };
	export { mColoring }

20 changes: 10 additions & 10 deletions Backtracking/tests/MColoringProblem.test.js

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		@@ -1,23 +1,23 @@
	import { mColoring } from '../MColoringProblem';
	import { mColoring } from '../MColoringProblem'

		describe('MColoringProblem', () => {
		it('should color a triangle with 3 colors', () => {
		const graph = [
		[0, 1, 1],
		[1, 0, 1],
		[1, 1, 0]
	];
	const solution = mColoring(graph, 3);
	expect(solution).not.toBeNull();
	});
	]
	const solution = mColoring(graph, 3)
	expect(solution).not.toBeNull()
	})

		it('should not color a triangle with 2 colors', () => {
		const graph = [
		[0, 1, 1],
		[1, 0, 1],
		[1, 1, 0]
	];
	const solution = mColoring(graph, 2);
	expect(solution).toBeNull();
	});
	});
	]
	const solution = mColoring(graph, 2)
	expect(solution).toBeNull()
	})
	})

1 change: 1 addition & 0 deletions DIRECTORY.md

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Expand Up		@@ -10,6 +10,7 @@
		* [SumOfSubset](Backtracking/SumOfSubset.js)
		* Bit-Manipulation
		* [BinaryCountSetBits](Bit-Manipulation/BinaryCountSetBits.js)
	* [GenerateSubSets](Bit-Manipulation/GenerateSubSets.js)
		* [GrayCodes](Bit-Manipulation/GrayCodes.js)
		* [IsPowerofFour](Bit-Manipulation/IsPowerofFour.js)
		* [IsPowerOfTwo](Bit-Manipulation/IsPowerOfTwo.js)
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1 change: 1 addition & 0 deletions package.json

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Expand Up		@@ -7,6 +7,7 @@
		"test": "vitest run",
		"test-watch": "vitest",
		"style": "npx prettier . --write",
	"check-style": "npx prettier . --check",
		"prepare": "husky install"
		},
		"author": "TheAlgorithms",
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