#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <cstdio>
#include <cstring>
#include <cmath>
using namespace std;

int64_t read() {
    static char s[1 << 16];
    static streamsize i0, i1;
    int64_t n = 0;
    int b = 0;
    while (1) {
        if (i0 == i1) {
            cin.read(s, sizeof(s));
            i0 = 0;
            i1 = cin.gcount();
            if (i1 == 0) break;
        }
        int c = s[i0++];
        if ('0' <= c && c <= '9') {
            n = n * 10 + (c - '0');
            b = 1;
        } else if (b) {
            break;
        }
    }
    return n;
}

int main() {
    int n = read();

    int64_t s = 0;
    for (int i = 0; i < n; i++) {
        s += read();
    }

    printf("%lld\n", s);

    return 0;
}