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# 0: size
# 1-n: elements
init:
contract.storage[1000] = msg.sender
code:
# Only owner of the heap is allowed to modify it
if contract.storage[1000] != msg.sender:
stop
# push
if msg.data[0] == 0:
sz = contract.storage[0]
contract.storage[sz + 1] = msg.data[1]
k = sz + 1
while k > 1:
bottom = contract.storage[k]
top = contract.storage[k/2]
if bottom < top:
contract.storage[k] = top
contract.storage[k/2] = bottom
k /= 2
else:
k = 0
contract.storage[0] = sz + 1
# pop
elif msg.data[0] == 1:
sz = contract.storage[0]
if !sz:
return(0)
prevtop = contract.storage[1]
contract.storage[1] = contract.storage[sz]
contract.storage[sz] = 0
top = contract.storage[1]
k = 1
while k * 2 < sz:
bottom1 = contract.storage[k * 2]
bottom2 = contract.storage[k * 2 + 1]
if bottom1 < top and (bottom1 < bottom2 or k * 2 + 1 >= sz):
contract.storage[k] = bottom1
contract.storage[k * 2] = top
k = k * 2
elif bottom2 < top and bottom2 < bottom1 and k * 2 + 1 < sz:
contract.storage[k] = bottom2
contract.storage[k * 2 + 1] = top
k = k * 2 + 1
else:
k = sz
contract.storage[0] = sz - 1
return(prevtop)
# top
elif msg.data[0] == 2:
return(contract.storage[1])
# size
elif msg.data[0] == 3:
return(contract.storage[0])
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