#include <stdio.h>

int main() {
    int N, i;
    
    scanf("%d", &N);
    
    int A[N];
    unsigned long long int sum = 0;
    
    for(i=0;i<N;i++) {
        scanf("%d", &A[i]);
        sum += A[i];
    }
    
    printf("%lld", sum);
    
    return 0;
    
}