Leetcode 之Add Binary(29)

比较简单,细节:先将字符串翻转,注意进位。
string addBinary(string a, string b)
{
string result; int len = a.size() > b.size() ? a.size() : b.size(); reverse(a.begin(), a.end());
reverse(b.begin(), b.end()); int carry = ; for (int i = ; i < len; i++)
{
int ai = i < a.size() ? a[i] - '' : ;
int bi = i < b.size() ? b[i] - '' : ; int val = (ai + bi + carry) % ;
carry = (ai + bi + carry) / ; result.insert(result.begin(), val + '');
} if (carry == )result.insert(result.begin(), '');
return result; }
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