#include <iostream> using namespace std; int main() { int i=0; string a; cin>>a; int len=a.size(); string ans; for(i=0;i<len;i++) { if(i+1<len) { if(a[i]==a[i+1]) { char b=a[i]; int count=0; while(i<len && a[i]==b) { count++; i++; } ans+=to_string (count); ans+=b; i--; } else { ans+='1'; ans+=a[i]; } } else { ans+='1'; ans+=a[i]; } } cout<<ans; return 0; }