Created
March 4, 2022 16:07
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Summle solver (https://summle.net/)
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| const target = 486; | |
| const nums = [3, 3, 6, 8, 9, 100]; | |
| const op = [['+', (a, b) => a + b], ['-', (a, b) => a - b], ['*', (a, b) => a * b], ['/', (a, b) => a / b]]; | |
| let numSolutions = 0; | |
| let bestSolution; | |
| function solve(nums, solution) { | |
| for (let i = 0; i < nums.length; i++) { | |
| for (let j = 0; j < nums.length; j++) { | |
| if (j != i) { | |
| for (let k = 0; k < op.length; k++) { | |
| const res = op[k][1](nums[i], nums[j]); | |
| if (Number.isInteger(res)) { | |
| const newSolution = [...solution, `${nums[i]} ${op[k][0]} ${nums[j]} = ${res}`]; | |
| if (res == target) { | |
| numSolutions++; | |
| if (!bestSolution || newSolution.length < bestSolution.length) { | |
| bestSolution = newSolution; | |
| console.log(newSolution); | |
| } | |
| } else { | |
| if (newSolution.length < 5) { | |
| const newNums = nums.slice(); | |
| newNums.splice(i, 1); | |
| newNums.splice(j - (i < j ? 1 : 0), 1); | |
| newNums.push(res); | |
| solve(newNums, newSolution); | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } | |
| solve(nums, []); | |
| console.log(numSolutions); |
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https://gist.github.com/mvladic/9b2f2025a8c54aca78649ce1776600b6#file-solve-js-L15