样例都过了为什么只有10pts 回者闭关

#include <iostream>
using namespace std;
long long  gcd(int a,int b)
{
    if (b == 0)
    {
        return a;
    }
    else return gcd(b,a%b);
}
long long lcm(int a,int b)
{
    return (a*b) / gcd(a,b);
}
int main()
{
    int n;
    int a[10];
    cin >> n;
    for (int i=0;i<n;i++)
    {
        cin >> a[i];
    }
    int res;
    for (int i = 2; i<n;i++)
    {
         res = lcm(lcm(a[i-1],a[i-2]),a[i]);
    }
    cout << res;
    return 0;
}