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Add Binary.cpp
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Add Binary.cpp
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class Solution {
public:
string addBinary(string a, string b) {
// Start typing your C/C++ solution below
// DO NOT write int main() function
int t = 0;
int lena = a.size();
int lenb = b.size();
reverse(a);
reverse(b);
string str1, str2;
string result = "";
int len1 = lena > lenb ? lena : lenb; // the shorter one
int len2 = lena > lenb ? lenb : lena;
str1 = lena > lenb ? a : b;
str2 = lena > lenb ? b : a;
for (int i = 0; i != len2; i++){
int x = str1[i] - '0' + str2[i] - '0' + t;
t = x/2;
result = result + (char)(x%2 + '0');
}
for (int i = len2; i != len1; i++){
int x = str1[i] - '0' + t;
t = x / 2;
result = result + (char)(x%2 + '0');
}
if (t)
result = result + '1';
reverse(result);
return result;
}
};