import std.algorithm;

import std.range;

​

auto arg_max(alias f, Range)(Range r) {

    return r.map!f.maxIndex;

}

​

auto range_max(alias f, T)(T a, T b) {

    return arg_max!f(iota(min(a,b), max(a,b)));

}

​

auto go(T)(T a, T b) {

    import std.math : abs;

    return range_max!(x => -abs(x-3))(a, b);

}

​

int main(string[] args) {

    auto a = cast(long) args.length - 11;  // -10

    auto b = cast(long) args.length + 9;   // 10

    return cast(int) go(a, b) & 0x1000;

}