View Code of Problem 3497

#include <stdio.h>
int main(){
  long long int a[100];
  while(scanf("%lld %lld %lld",&a[0],&a[1],&a[2])!=EOF){
    for(int i=3;i<100;i++){
      a[i]=a[i-1]+a[i-2]+a[i-3];
    }
    printf("%lld\n",a[99]);
  }
}