RosettaCodeData/Task/Knapsack-problem-Continuous/D/knapsack-problem-continuous...

27 lines
852 B
D

void main() {
import std.stdio, std.algorithm;
static struct T { string item; double weight, price; }
auto items = [T("beef", 3.8, 36.0),
T("pork", 5.4, 43.0),
T("ham", 3.6, 90.0),
T("greaves", 2.4, 45.0),
T("flitch", 4.0, 30.0),
T("brawn", 2.5, 56.0),
T("welt", 3.7, 67.0),
T("salami", 3.0, 95.0),
T("sausage", 5.9, 98.0)]
.schwartzSort!q{ -a.price / a.weight };
auto left = 15.0;
foreach (it; items)
if (it.weight <= left) {
writeln("Take all the ", it.item);
if (it.weight == left)
return;
left -= it.weight;
} else
return writefln("Take %.1fkg %s", left, it.item);
}