#include<iostream>

int main()
{
    unsigned long  N;
    std::cin>>N;
    
    unsigned long v[N];
    unsigned long sum=0;
    
    for(int i=0;i<N;i++)
    {
        std::cin>>v[i];
        sum+=v[i];
    }
    
    std::cout<<sum<<std::endl;
}