#include <stdio.h>

const int DIM = (1 << 12);
char buff[DIM];
int poz = 0;

void read(int &numar) {
  numar = 0;
  while (buff[poz] < '0' || buff[poz] > '9')
    if (++poz == DIM)
      fread(buff, 1, DIM, stdin), poz = 0;
  while ('0' <= buff[poz] && buff[poz] <= '9') {
    numar = numar * 10 + buff[poz] - '0';
    if (++poz == DIM)
      fread(buff, 1, DIM, stdin), poz = 0;
  }
}

int main(void) {
  int n, x;
  long long sum = 0;
  freopen("parse.in", "r", stdin);
  read(n);
  for (int i = 0; i < n; i++) {
    read(x);
    sum += x;
  }
  printf("%lld\n", sum);
}