#include <bits/stdc++.h> using namespace std; int main() { int n; string s1, s2; cin >> n >> s1 >> s2; long long s1int=0, s2int=0, sum=0; int x; for(int i = 0; i<s1.size(); i++) { if(s1[i]<='9') { x=s1[i]-'0'; } else { x=s1[i]-'A'+10; } s1int=s1int*n+x; } for(int i = 0; i<s2.size(); i++) { if(s2[i]<='9') { x=s2[i]-'0'; } else { x=s2[i]-'A'+10; } s2int=s2int*n+x; } string ans; sum=s1int+s2int; while(sum) { char c; if(sum%n<=9) { c='0'+sum%n; } else { c='A'+sum%n-10; } ans=c+ans; sum/=n; } if(ans=="") { ans="0"; } cout << ans << endl; return 0; }