10000000 0

#include <cstdio>
#include <cstring>
using namespace std;

static constexpr size_t buf_size = 1 << 18;
static constexpr size_t integer_size = 20;

static char inbuf[buf_size + 1] = {};

size_t pos, end;

void load() {
	end = fread(inbuf, 1, buf_size, stdin);
	inbuf[end] = '\0';
}
void reload() {
	size_t len = end - pos;
	memmove(inbuf, inbuf + pos, len);
	end = len + fread(inbuf + len, 1, buf_size - len, stdin);
	inbuf[end] = '\0';
	pos = 0;
}
void skip_space() {
	while (inbuf[pos] <= ' ') {
		if (__builtin_expect(++pos == end, 0))
			reload();
	}
}
char get_next() { return inbuf[pos++]; }
char get_next_nonspace() {
	skip_space();
	return inbuf[pos++];
}

void scan(int &x) {
	char c = get_next_nonspace();
	if (__builtin_expect(pos + 10 >= end, 0))
		reload();
	bool neg = false;
	if (c == '-')
		neg = true, x = 0;
	else
		x = c & 15;
	while ((c = get_next()) >= '0')
		x = x * 10 + (c & 15);
	if (neg)
		x = -x;
}

void scan(long long &x) {
	char c = get_next_nonspace();
	if (__builtin_expect(pos + integer_size >= end, 0))
		reload();
	bool neg = false;
	if (c == '-')
		neg = true, x = 0;
	else
		x = c & 15;
	while ((c = get_next()) >= '0')
		x = x * 10 + (c & 15);
	if (neg)
		x = -x;
}

int main()
{
	int x, y;
	long long res = 0;
	
	load();
	scan(x);
	while (x--)
	{
		scan(y);
		res += y;
	}
	printf("%lld\n", res);
	return 0;
}