#include<cstdio>
using namespace std;
typedef long long ll;
inline ll read()
{
    ll ans=0,sign=1;
    char c=getchar_unlocked();
    if(c=='-')
    {
        sign=-1;
    }
    else if(c<='9'&&c>='0'&&c!=EOF&&c!=' '&&c!='\n')
    {
        ans*=10;
        ans+=c-'0';
    }
    c=getchar_unlocked();
    while(c<='9'&&c>='0'&&c!=EOF&&c!=' '&&c!='\n')
    {
        ans*=10;
        ans+=c-'0';
        c=getchar_unlocked();
    }
    return ans*sign;
}
int main()
{
    ll n=read();
    ll sum=0;
    for(ll i=1;i<=n;++i)
    {
        sum+=read();
    }
    printf("%lld",sum);
    return 0;
}