#include <stdio.h>

#define N 500000

int main(int argc, char *argv[]){
    int n;
    long int tmp = 0;
    long int sum = 0;
    scanf("%d",&n);
    for (int i = 0; i < n; i++)
    {
        scanf("%ld",&tmp);
        sum += tmp;
    }
    printf("%ld\n",sum);
}