obtain the largest multiplication result with 3 successive integers

The results :

inputs
4        // the number of the integers 
3 4 1 2  // the values in vector 
outputs
12   

The codes:

#include 
#include
using namespace std;
int biggest_multiple(vector a);  // obtain the largest multiplication result with 3 successive integers 
int main()
{
    int num;
    cin >> num;
    vector v;
    int temp;
    for(int i = 0; i < num; i++){
        cin >> temp;
        v.push_back(temp);
    }
    //cout << v.size() << endl;
    int result = 0;
    result = biggest_multiple(v);
    cout << result << endl;
    return 0;
}
int biggest_multiple(vector a){
    int max_multiple = INT_MIN, temp;
    for(int i = 0; i < a.size()-2; i++){
        temp = a[i]*a[i+1]*a[i+2];
        max_multiple = max(max_multiple, temp);
    }
    return max_multiple;
}