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## arrScore = ["5", "2", "C", "D", "+"] ## Example 1
## arrScore = ["5", "-2", "4", "C", "D", "9", "+", "+"] ## Example 2
## arrScore = ["7", "D", "D", "C", "+", "3"] ## Example 3
## arrScore = ["-5", "-10", "+", "D", "C", "+"] ## Example 4
arrScore = ["3", "6", "+", "D", "C", "8", "+", "D", "-2", "C", "+"] ## Example 5
nIndx = 0
while nIndx < len(arrScore):
strElem = arrScore[nIndx]
if "-" in strElem:
arrScore[nIndx] = -1 * int(strElem.replace("-", ""))
elif strElem.isdigit():
arrScore[nIndx] = int(strElem)
elif strElem == "+":
arrScore[nIndx] = sum(arrScore[nIndx - 2 : nIndx])
elif strElem == "C":
del arrScore[nIndx]
del arrScore[nIndx - 1]
nIndx = nIndx - 1
continue
elif strElem == "D":
arrScore[nIndx] = 2 * int(arrScore[nIndx - 1])
nIndx = nIndx + 1
## print (arrScore)
print (sum(arrScore))
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