10.30

#include<stdio.h>

int yin(int s);

int main()

{

int s;

scanf("%d",&s);

if(s==yin(s))  

printf("YES");

else  

printf("NO");

return 0;

}

int yin(int s)

{int i,sum=0;

for(i=1;i<s;i++)

{if(s%i==0)

sum+=i;

}

return sum;

}