import std.stdio, std.string, std.conv;
import std.range, std.algorithm;

void main() {
    int n;
    long[] a;

    readf(" %s", &n);

    a = new long[](n);

    foreach (i ; 0 .. n) {
        readf(" %s", a.ptr + i);
    }

    writeln(a.sum());
}