Calculate the Nth term in C

Solution in C-

Sample Input 0
5
1 2 3

Sample Output 0
11


Solution in C:-

#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>

//Complete the following function.

int find_nth_term(int n, int a, int b, int c) {
  //Write your code here.
  int s[n],i;
   s[1]=a;
   s[2]=b;
   s[3]=c;

   for(i=4;i<=n;i++)
   {
       s[i]=s[i-1]+s[i-2]+s[i-3];

   }
   return s[n];
 }

int main() {
    int n, a, b, c; 

    scanf("%d %d %d %d", &n, &a, &b, &c);
    int ans = find_nth_term(n, a, b, c);
    printf("%d", ans);
    return 0;
}