[LeetCode] 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”.
class Solution {public: string addBinary(string a, string b) { if (a.size() < b.size()) return addBinary(b,a); b.insert(0, a.size() - b.size(), '0'); string res; int carry = 0; for (int i = (int)a.size() - 1; i >= 0; i--) { int sum = (a[i] - '0') + (b[i] - '0') + carry; carry = sum / 2; sum %= 2; res.insert(0, 1, sum + '0'); } if (carry) res.insert(0, 1, '1'); return res; }};阅读全文
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