123456789101112131415161718192021222324252627282930313233343536373839404142/** * @param {string} s * @return {number} */ var numDecodings = function(s) { const n = s.length; let f0 = 1; let f1 = s[0] === ‘0’ ? 0 : 1; let fn = 0; for (let i = 1; i < n; i++) { // ***?0… Continue reading 91. Decode Ways