#include<bits/stdc++.h>
using namespace std;
int main(){
    int n,m,k,l;
    cin>>n;
    m=n/100;
    k=n%100/10*10;
    l=n%10*100;
    cout<<m+k+l;
}
/**************************************************************
	Problem: 1028
	User: zhengzihao
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/