N-Parasitic Numbers Ending in N

// n = 분자, dn = 분모 function bigDivide(n, dn) { let curr=n, decimalStr='', period=0, remainder; while(period++ <= 1000) { if (dn > curr) { decimalStr += 0 } else { decimalStr += parseInt(curr/dn) curr = remainder = curr%dn } curr *= 10 if (remainder === n) break } return decimalStr.slice(1) // 정수부 제외 } // 8, 10, 16진법 지원해야함 // find parasitic number ending in n function calculateSpecial(n, base) { return bigDivide(n, 10*n - 1) }

describe("Tests", () => { it("test", () => { Test.assertEquals(calculateSpecial(4, 10), '102564'); Test.assertEquals(calculateSpecial(3, 10), '1034482758620689655172413793'); Test.assertEquals(calculateSpecial(2, 10), '105263157894736842'); Test.assertEquals(calculateSpecial(1, 10), '1'); }); });