Codeforces Round #790 (Div. 4) 1676C. Most Similar Words Solution

 Solution in C++: 

///La ilaha illellahu muhammadur rasulullah

///******Bismillahir-Rahmanir-Rahim******///

///Abul Hasnat  Tonmoy

///Department of CSE,23rd batch

///Islamic University,Bangladesh

///**********ALLAH IS ALMIGHTY************///

#include <bits/stdc++.h>

using namespace std;

int main()

{

    int  t,n,m,i,j,r,sm;

    cin>>t;

    while(t--)

    {

        string s,a,b;

        sm=0;

        vector<string>vs;

        vector<int>vi;

        cin>>n>>m;

        for(i=0; i<n; i++)

        {

            cin>>s;

            vs.push_back(s);

        }

        for(i=0; i<vs.size(); i++)

        {

            for(j=i+1; j<vs.size(); j++)

            {

                sm=0;

                a=vs[i];

                b=vs[j];

                for(r=0; r<a.size(); r++)

                {

                    sm+=abs(int(a[r])-int(b[r]));

                }

                vi.push_back(sm);

            }

        }

        sort(vi.begin(),vi.end());

        cout<<vi[0]<<endl;

        vi.clear();

        vs.clear();

    }

}