import core.bitop;
import std.algorithm;
import std.ascii;
import std.bigint;
import std.conv;
import std.functional;
import std.math;
import std.numeric;
import std.range;
import std.stdio;
import std.string;
import std.random;
import std.typecons;
import std.container;

alias sread = () => readln.chomp();
alias Point2 = Tuple!(long, "y", long, "x");
long bignum = 1_000_000_007;
auto dp = new long[](100_100);

T lread(T = long)()
{
    return readln.chomp.to!T();
}

T[] aryread(T = long)()
{
    return readln.split.to!(T[])();
}

void scan(TList...)(ref TList Args)
{
    auto line = readln.split();
    foreach (i, T; TList)
    {
        T val = line[i].to!(T);
        Args[i] = val;
    }
}

void main()
{
    auto n = lread();
    auto a = aryread();
    long sunuke, rascoon = a.sum;
    auto accum = long.max;
    foreach (i, e; a)
    {
        sunuke += e;
        rascoon -= e;
        if (i < n - 1)
            accum = min(abs(sunuke - rascoon), accum);
    }
    accum.writeln();
}