#include <stdio.h>

long a_very_big_sum(int count, long a[]);

long fill_vector(long a[], int count);

long a_very_big_sum(int count, long a[]) {
    
     long sum = 0;
     
    for (int i = 0; i < count; i++) {
        sum += a[i];
    }
    
    return sum;
}

long fill_vector(long a[], int count) {
    
    for (int i = 0; i < count; i++) {
        scanf("%ld", &a[i]);
    }
    
    return a_very_big_sum(count, a);
}


int main() {
    
    int count = 0;
    
    scanf("%d", &count);
    
    long a[count];
    
    
    long result = fill_vector(a,count);
    
    printf("%ld", result);
    
    return 0;
}