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Create Water_Jug_Problem.js function in the Recursive section#1751
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844c127 Create Water_Jug_Problem.js
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swappy-200350825fa Create WaterJugProblem.test.js
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swappy-2003994a850 Rename Water_Jug_Problem.js to WaterJugProblem.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,53 @@ | ||
| // WaterJugProblem.js | ||
| export function canMeasureWater(jug1Capacity, jug2Capacity, targetAmount) { | ||
| // Input validation | ||
| if (jug1Capacity < 0 || jug2Capacity < 0) { | ||
| throw new Error("Invalid input: capacities must be non-negative."); | ||
| } | ||
| if (targetAmount < 0) { | ||
| throw new Error("Invalid input: target amount must be non-negative."); | ||
| } | ||
| // Base case: If the target amount is greater than the sum of both jugs, it's not possible. | ||
| if (targetAmount > jug1Capacity + jug2Capacity) return false; | ||
| // Use BFS to explore possible states. | ||
| let visited = new Set(); // To keep track of visited states. | ||
| let queue = [[0, 0]]; // Starting with both jugs empty. | ||
| while (queue.length > 0) { | ||
| let [jug1, jug2] = queue.shift(); | ||
| // If we've reached the target amount in either jug. | ||
| if ( | ||
| jug1 === targetAmount || | ||
| jug2 === targetAmount || | ||
| jug1 + jug2 === targetAmount | ||
| ) { | ||
| return true; | ||
| } | ||
| // If this state has been visited, skip it. | ||
| let state = `${jug1},${jug2}`; | ||
| if (visited.has(state)) continue; | ||
| visited.add(state); | ||
| // Add all possible next states to the queue: | ||
| queue.push([jug1Capacity, jug2]); // Fill Jug 1 | ||
| queue.push([jug1, jug2Capacity]); // Fill Jug 2 | ||
| queue.push([0, jug2]); // Empty Jug 1 | ||
| queue.push([jug1, 0]); // Empty Jug 2 | ||
| queue.push([ | ||
| Math.max(0, jug1 - (jug2Capacity - jug2)), | ||
| Math.min(jug2Capacity, jug1 + jug2), | ||
| ]); // Pour Jug 1 into Jug 2 | ||
| queue.push([ | ||
| Math.min(jug1Capacity, jug1 + jug2), | ||
| Math.max(0, jug2 - (jug1Capacity - jug1)), | ||
| ]); // Pour Jug 2 into Jug 1 | ||
| } | ||
| // If no solution is found | ||
| return false; | ||
| } |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,36 @@ | ||
| // WaterJugProblem.test.js | ||
| import { canMeasureWater } from "../WaterJugProblem"; // Adjust the path as necessary | ||
| describe("Water Jug Problem", () => { | ||
| it("should return true for values jug1=3, jug2=5, target=4", () => { | ||
| expect(canMeasureWater(3, 5, 4)).toBe(true); | ||
| }); | ||
| it("should return false for values jug1=2, jug2=6, target=5", () => { | ||
| expect(canMeasureWater(2, 6, 5)).toBe(false); | ||
| }); | ||
| it("should return true for values jug1=5, jug2=3, target=5", () => { | ||
| expect(canMeasureWater(5, 3, 5)).toBe(true); | ||
| }); | ||
| it("should return true for values jug1=3, jug2=5, target=0", () => { | ||
| expect(canMeasureWater(3, 5, 0)).toBe(true); | ||
| }); | ||
| it("should return true for values jug1=3, jug2=5, target=8", () => { | ||
| expect(canMeasureWater(3, 5, 8)).toBe(true); | ||
| }); | ||
| it("should throw an error for invalid input", () => { | ||
| expect(() => canMeasureWater(-1, 5, 3)).toThrow( | ||
| "Invalid input: capacities must be non-negative." | ||
| ); | ||
| expect(() => canMeasureWater(3, -2, 1)).toThrow( | ||
| "Invalid input: capacities must be non-negative." | ||
| ); | ||
| expect(() => canMeasureWater(3, 5, -1)).toThrow( | ||
| "Invalid input: target amount must be non-negative." | ||
| ); | ||
| }); | ||
| }); |
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