Codeforces 131A. cAPS lOCK Solution

  ///La ilaha illellahu muhammadur rasulullah

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

///Abul Hasnat  Tonmoy

///Department of CSE,23rd batch

    ///Islamic University,Bangladesh

    #include <bits/stdc++.h>

    using namespace std;

    int main()

    {

        string s;

        int i,n,len,j,up=0,lw=0,c=0,c1=0;

        cin>>s;

        len=s.size();

        for(i=0; i<len; i++)

        {

            if(s[i]<91)

                up++;

        }

        if((up==len)||((s[0]>91)&&(len-1==up)))

        {

            for(i=0; i<len; i++)

            {

                if(s[i]>91)

                    s[i]=s[i]-32;

                else

                    s[i]=s[i]+32;

            }

        }

        cout<<s<<endl;


    }


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