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[LeetCode]67 Add Binary
https://oj.leetcode.com/problems/add-binary/
http://blog.csdn.net/linhuanmars/article/details/20192227
public class Solution { public String addBinary(String a, String b) { StringBuilder sb = new StringBuilder(); char[] charsA = a.toCharArray(); char[] charsB = b.toCharArray(); int indexA = charsA.length - 1; int indexB = charsB.length - 1; boolean carry = false; while (indexA >= 0 || indexB >= 0) { int v = indexA >= 0 ? charsA[indexA] - ‘0‘ : 0; v += indexB >= 0 ? charsB[indexB] - ‘0‘ : 0; if (carry) v ++; carry = v > 1; sb.append(v % 2); indexA --; indexB --; } if (carry) sb.append("1"); return sb.reverse().toString(); } }
[LeetCode]67 Add Binary
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