#include <stdio.h>

int main () {
  int n = 0;
  int a = 0;
  
  int res = 0;
  
  long long ans = 0LL;
  
  res = scanf("%d", &n);
  while (n > 0) {
    res = scanf("%d", &a);
    ans += (long long)a;
    n--;
  }
  
  printf("%lld\n", ans);
  return 0;
}