Verified answer

#include <stdio.h>

int m(int x)

{

int s=0;

for(;x>0;)

{

s=s+x%10;

x=x/10;

}

return s;

}

int main()

{

int i,j,k,r;

scanf("%d%d%d",&i,&j,&k);

r=m(i)+m(j)+m(k);

printf("%d",r);

return 0;

}