#include <iostream> using namespace std; int main() { int a,b; cin>>a>>b; if(ab!=300){ int c=ab; cout<<c%10<<c/10; }else{ cout<<3; } return 0; }

#include<iostream> using namespace std; int main(){ int a,b,c,o=0,k=1,l,p=0; cin>>a>>b; c=ab; l=c; while(l!=0){ l=l/10; p++; } for(int i=1;i<=p-1;i++){ k=k10; } while(c!=0){ o=o+c%10*k; c=c/10; k=k/10; } cout<<o; return 0; }

#include<iostream> using namespace std; int main(){ int a,b; cin>>a>>b; long long x=ab,sum=0; while(x!=0){ sum=10; sum+=x%10; x/=10; } cout<<sum; return 0; }