#include <iostream>
using namespace std;
int main(){
    int n,ge,shi,bai,he;
    cout << "请输入一个三位数：";
    cin >> n;
    ge=n%10;
    shi=(n/10)%10;
    bai=n/100;
    he=ge+shi+bai;
    cout<<"各个位数之和是："<<he<<endl;
    return 0;
}