#include <bits/stdc++.h >
using namespace std;

int main£¨£© {
int n,ans=0;
cin >> n;
for £¨int i = n; i!= 0; i/10£© {
int num=i % 10;
ans+=num;
}
cout << ans;
return 0;
}

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#include<bits/stdc++.h>
using namespace std;

int main£¨£© {
int n ;
cin >> n;
for £¨int i = n ; i != 0 ; i /= 10£© {
int num = i % 10;
cout << num ;
}
return 0;
}
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#include<bits/stdc++.h>
using namespace std;

int main£¨£© {

int a,h,op=0,ko=0;
cin>>a;
int xx=1;
for£¨int b=a;b!=0;b/=10£©{
h=b%10;
++op;
}
//µÃÖª¼¸Î»Êý
--op;

for£¨int b=a;b!=0;b/=10£©{
h=b%10;
for£¨int u=1;u<=op;++u£©{
xx*=10;
}
ko+=h*xx;
--op;
xx=1;
}
cout<<ko;

return 0;
}

#include <bits/stdc++.h>
using namespace std;

int main(){
   
    int n;
    cin >> n;
    for (;n != 0;n /= 10){
        cout << n % 10;
    }
   
}
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#include<bits/stdc++.h>
using namespace std;
int main£¨£©{

int n , cnt=0;
cin >> n;
for£¨int i = n; i != 0; i /= 10£©{
int num = i % 10;
++cnt;
cout << num <<" ";
}
cout << "\n" << "nµÄλÊýÊÇ£º" << cnt;

return 0;
}
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