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添加0150逆波兰表达式求值 python3 版本

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boom-jumper
2021-05-27 20:37:53 +08:00
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problems/0150.逆波兰表达式求值.md
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@ -224,6 +224,22 @@ var evalRPN = function(tokens) {
};
```
python3
```python
def evalRPN(tokens) -> int:
stack = list()
for i in range(len(tokens)):
if tokens[i] not in ["+", "-", "*", "/"]:
stack.append(tokens[i])
else:
tmp1 = stack.pop()
tmp2 = stack.pop()
res = eval(tmp2+tokens[i]+tmp1)
stack.append(str(int(res)))
return stack[-1]
```
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