10000000 10000000

#include <iostream>
#include <cstring>
#include <limits>
using namespace std;

static constexpr size_t buf_size = 1 << 18;

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

namespace {
int pos, end;

void load() {
	pos = 0;
	end = cin.readsome(inbuf, buf_size);
	inbuf[end] = '\0';
}
void reload() {
	size_t len = end - pos;
	memmove(inbuf, inbuf + pos, len);
	end = len + cin.readsome(inbuf + len, buf_size - len);
	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++];
}

template<class T>
void scan(T &x) {
	char c = get_next_nonspace();
	if (__builtin_expect(pos + numeric_limits<T>::digits10 + 1 >= 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()
{
	cin.tie(0)->sync_with_stdio(0);
	
	int x = 1e7, y;
	long long res = 0;
	
	load();
	scan(x);
	while (x--)
	{
		scan(y);
		res += y;
		// res ^= y;
	}
	cout << res << "\n";
	
	return 0;
}

/* name: out
 * author: 5ab
 * created at: 2023-09-26
 */
#include <cstdio>
using namespace std;

constexpr int obuf = 1e8 + 1;

char s[obuf + 1];

signed main()
{
	int n = 1e7, p = 0;
	
	while (n--)
	{
		s[p++] = '1';
		s[p++] = '1';
		s[p++] = '1';
		s[p++] = '1';
		s[p++] = '1';
		s[p++] = '1';
		s[p++] = '1';
		s[p++] = '1';
		s[p++] = '1';
		s[p++] = ' ';
	}
	fwrite(s, 1, p, stdout);
	
	return 0;
}
// started coding at: 09-26 18:32:36