67. Add Binary
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Given two binary strings, return their sum (also a binary string).
For example,
a = "11"
b = "1"
Return "100".
public class Solution { public String addBinary(String a, String b) { int m = a.length(); int n = b.length(); String res = ""; int carry = 0; int i = 0; while(i<m || i<n || carry!=0){ int x = (i<m) ? a.charAt(m - 1 - i) - '0' : 0; int y = (i<n) ? b.charAt(n - 1 - i) - '0' : 0; res = (x + y + carry)%2 + res; carry = (x + y + carry)/2; i++; } return res; }}阅读全文
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