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scope allSpreads.
sclass StackEntry {
int remaining, n, take;
L collecting;
int position;
O step(L stack) {
printStruct(stack);
if (position == 0) {
if (l(collecting) >= n-1) {
L result = listPlus(collecting, remaining);
popLast(stack);
ret result;
}
position++;
} else if (position == 1) {
if (take <= remaining) {
collecting.add(take);
new StackEntry e;
e.remaining = remaining-take;
e.n = n;
e.collecting = collecting;
stack.add(e);
position++;
} else
popLast(stack);
} else if (position == 2) {
removeLast(collecting);
take++;
position = 1;
}
null;
}
}
static IterableIterator> allSpreads(final int toSpread, final int buckets) {
final new L stack;
new StackEntry e;
e.n = buckets;
e.remaining = toSpread;
e.collecting = new L;
stack.add(e);
ret iff(func {
while (nempty(stack)) {
ping();
try object last(stack).step(stack);
}
ret endMarker();
});
}
end scope