#include <bits/stdc++.h>
#define int long long
using namespace std;
int cnt=0;
int in(){
    int sb=0,f=1;
    while(1){
        char c=getchar_unlocked();
        if(c==' ') return f*sb;
        else if(c=='-') f=-1;
        else{
            sb*=10;
            sb+=(c-'0');
        }
    }
}
signed main(){
    int n;
    scanf("%lld",&n);
    for(int i=1;i<=n;i++){
        int l=in();
        cnt+=l;
    }
    printf("%lld",cnt);
}