#include<iostream> #include<cstring> char a[55]; char b[55]; char c[55]; using namespace std; int main() { int N; cin>>N; cin>>a>>b; for(int i=0;i<=N;i++) { if((a[i]=='1'&&b[i]=='1')||(a[i]=='0'&&b[i]=='0')) { c[i]='1'; } else { c[i]='0'; } } cout<<c; return 0; }