#include "stdio.h"

int main(void){
    int i= 0;
    int n = 0;
    long long numb = 0;
    long long num = 0;

    scanf("%d",&n);
    for(i=0;i<n;i++){
        scanf("%lld",&num);
        numb += num;
    }
    printf("%lld\n",numb);
    return 0;

}