def to_uint(array, pos=0):
	for i in range(len(array)) :
		array[i] = array[i] & 0xFF
	
	#byte 1
	n = array[pos]
	if (not (n & (1 << 7))):
		return n, pos+1
	n -= (1 << 7)
	
	#byte 2
	n = n | (array[pos+1] << 7)
	if (not (n & (1 << 14))):
		return n, pos+2
	n -= (1 << 14)
	
	#byte 3
	n = n | (array[pos+2] << 14)
	if (not (n & (1 << 21))):
		return n, pos+3
	n -= (1 << 21)
	
	#byte 4
	n = n | (array[pos+3] << 21)

	#Negative numbers
	if (n & (1 << 28)):
		n -= (1 << 28);
		n = -( (~n & 0x0FFFFFFF) + 1)

	return n, pos+4

def from_uint(n) :
	if (n < 0) or (n >= (1 << 21)) :
			return [0x80 | (n & 0x7F),
				0x80 | ((n>>7) & 0x7F),
				0x80 | ((n>>14) & 0x7F),
				0x80 | ((n>>21) & 0xFF)]
	elif n < (1<<7) :
		return [n]
	elif n < (1<<14) :
		return [0x80 | (n & 0x7F),
				n >> 7]
	else :
		return [0x80 | (n & 0x7F),
				0x80 | ((n>>7) & 0x7F),
				n>>14]

print from_uint(5)
print to_uint([5])

print from_uint(100)
print to_uint([100])

print from_uint(255)
print to_uint([255, 1])

print from_uint(1000)
print to_uint([232, 7])

print from_uint(-1)
print to_uint([255, 255, 255, 255])

print from_uint(-666)
print to_uint([230, 250, 255, 255])

print from_uint(-1234)
print to_uint([174, 246, 255, 255])

print from_uint(-9999)
print to_uint([241, 177, 255, 255])

print to_uint([225, 65])
print to_uint([142, 2])
print to_uint([-128, 64])
print to_uint([-31, 65])