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-rw-r--r--other/add_binary.cpp30
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diff --git a/other/add_binary.cpp b/other/add_binary.cpp
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+++ b/other/add_binary.cpp
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+// 67. Add Binary
+#include "leetcode.h"
+
+class Solution {
+public:
+ string addBinary(string a, string b) {
+ int i = a.size() - 1, j = b.size() - 1, carry = 0;
+ string ans;
+ while (i >= 0 || j >= 0 || carry) {
+ if (i >= 0) {
+ carry += a[i] - '0';
+ i--;
+ }
+ if (j >= 0) {
+ carry += b[j] - '0';
+ j--;
+ }
+ ans += (carry % 2 + '0');
+ carry /= 2;
+ }
+ reverse(ans.begin(), ans.end());
+ return ans;
+ }
+};
+
+int main() {
+ Solution obj;
+ cout << obj.addBinary("11", "1") << endl; // expect: 100
+ cout << obj.addBinary("1010", "1011") << endl; // expect: 10101
+}