#include <stdio.h> int main() { int i = 0; scanf("%d", &i); int ret = 0; while (i) { ret += i % 10; i /= 10; } printf("%d\n", ret); return 0; }
#include <stdio.h> int main() { int a; int n=0; while(scanf("%1d",&a)!=EOF) { n+=a; } printf("%d",n); return 0; }