样例过，前#1#2#3WA，#4TLE

#include<bits/stdc++.h>
#define int long long
using namespace std;
int read(){
    int f=1,k=0;
    char c=getchar();
    if(c=='-') 
		f=-1;
    while(c<'0'||c>'9')
        c=getchar();
    while(c>='0'&&c<='9'){
        k=k*10+c-'0';
        c=getchar();
    }
    return f*k;
}
void write(int x){
	if(x<0)
		putchar('-'),x=-x;
	if(x>9)
		write(x/10);
	putchar(x%10+'0');
}
int n,sum;
signed main(){
    n=read();
    while(n--){
        long long x;
        x=read();
        sum+=x;
    }
    write(sum);
    return 0;
}