1790. Check if One String Swap Can Make Strings Equal.cpp

class Solution {
public:
    bool areAlmostEqual(string s1, string s2) {
       int count=0;
       map<char,int> m1,m2;
        for(int i=0;i<s1.length();i++){
          m1[s1[i]]++;
          m2[s2[i]]++;
          if(s1[i]!=s2[i]) count++;
          if(count>2) return false;
        }
      if((count==0||count==2)&&m1==m2) return true;
      return false;
    }
};