#include <bits/stdc++.h> using namespace std; const int N=100; int ans1,ans2,n,ans; int Change_to_10(int len,string a) { int sum=0,p=0; for(int i=len-1;i>=0;--i) { if(a[i]>='0' && a[i]<='9') { sum+=(a[i]-'0')*pow(n,p); } else if(a[i]>='A' && a[i]<='Z') { sum+=(a[i]-'A'+10)*pow(n,p); } else { sum+=(a[i]-'a'+10)*pow(n,p); } ++p; } return sum; } void Change_to_N(int x) { int a[500]={0},l=0; if(x==0) { cout<<0; return; } while(x!=0) { a[++l]=x%n; x/=n; } for(int i=l;i>=1;i--) { if(a[i]>=10) { char hhh='A'; hhh+=a[i]-10; cout<<hhh; } else { cout<<a[i]; } } } int main() { string a,b; cin>>n>>a>>b; ans1=Change_to_10(a.size(),a); ans2=Change_to_10(b.size(),b); ans=ans1+ans2; Change_to_N(ans); return 0; }