1768. Merge Strings Alternately leetcode solution in c++
class Solution {
public:
string mergeAlternately(string word1, string word2) {
string s;
int n1=word1.length();
int n2=word2.length();
for(int i=0; i<n1||i<n2; i++)
{
if(i<n1) s+=word1[i];
if(i<n2) s+=word2[i];
}
return s;
}
};