Published
Edited
Mar 23, 2019
function repeatedString(s, n) {
if (s === 'a') return n;
if (!s.includes('a')) return 0;
// How many 'a' are in the given string: 'aba' has 2 'a'
const ocurrences = s.match(/a/g).length;
// How may times does the string can be in a string of n: 10/3 = 3.33
const repeatTimes = n / s.length;
// Calculate how many chars from the remanent
const c = n - s.length * Math.floor(repeatTimes);
// Generate the string base from the chars that we need for the remanent
const remanentStr = s.substr(0, c).match(/a/g) || [];
// Check if the repeatTimes is not an integer we need to calculate the remanent
return Number.isInteger(repeatTimes)
? ocurrences * repeatTimes
: (ocurrences * Math.floor(repeatTimes)) + remanentStr.length;
}
repeatedString('gfcaaaecbg', 547602)
repeatedString('aba', 10)
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