import std.stdio;
import std.array;
import std.algorithm;
import std.range;
import std.conv;
import std.typecons;

static bool even(Tuple!(ulong, double) a) {
 	return (a[0] & 1) == 0;
}

void main() {
	double[] arr = [31, 22, -3, 44, 51, 26, 47, 58, 19, 10];
	auto res1 = arr.enumerate.filter!(even).map!(a => a[1]);
    writeln(res1);
    writeln(__VERSION__);

}