# include<iostream> # include<cstdio> using namespace std; int main(){ //思路，用3个变量ge,shi,bai存储对应的值，然后求和 int n,ge,shi,bai; scanf("%d",&n); ge=n%10; shi=n/10%10; bai=n/100%10; printf("%d\n",ge+shi+bai); return 0; }