Bon Appétit Hackerrank solution in C

#include<stdio.h>

int main()

{

int n,i,k,b,s1=0,s2;

long int a[100000];

scanf("%d%d",&n,&k);

for(i=0;i<n;i++)

{

scanf("%ld",&a[i]);

}

scanf("%d",&b);

for(i=0;i<n;i++)

{

s1=s1+a[i];

}

s2=s1-a[k];

if(s2/2==b)

{

printf("Bon Appetit\n");

}

else if(b>s2/2)

{

printf("%d",b-s2/2);

}

return 0;

}