rt

#include<bits/stdc++.h>
using namespace std;
const int N=1e8+15;
inline long long read(){
	int x=0,f=1;
	char c=getchar();
	while(c<'0'||c>'9'){
		if(c=='-') f=-1;
		c=getchar();
	}
	while(c>='0'&&c<='9'){
		x=(x<<1)+(x<<3)+(c-'0');
		c=getchar();
	}
	return x*f;
}
int a[N];
int main(){
	long long n=read();
	long long sum=0;
	for(int i=1;i<=n;i++){
	    a[i]=read();
	    sum+=a[i];
	}
	cout<<sum;
	return 0;
}