#include <stdio.h>

int main(void) {
	// your code goes here
    int a,ge,bai,qian,wan,siwan,sum;
    scanf("%d",&a);
    ge=a%10;
    bai=a/100%10;
    qian=a/1000%10;
    wan=a/10000%10;
    siwan=a/100000;
    sum=ge+bai+qian+wan+siwan;
    printf("sum=%d",sum);
	return 0;
}