1768. Merge Strings Alternately.cpp

class Solution {
public:
    string mergeAlternately(string word1, string word2) {
        
        int n = word1.size(), m = word2.size();
        
        string ans = "";
        
        int i = 0 , j = 0;
        
        while(i < n && j < m){
              ans += word1[i];
              ans += word2[j];
                 i++;
                 j++;
        }
        
        while(i < n ){
            ans += word1[i];
            i++;
        }
        
          
        while(j < m){
            ans += word2[j];
            j++;
        }
        
        
        return ans;
    }
};