Return False if len(stack) != 1 else int(stack)Ģ. Sliding Window Maximum (Leetcode Number: 239)ģ. Top K Frequent Elements (Leetcode Number: 347)īy applying the heap queue, the smallest value could always be removed first. If tokens != "+" and tokens != "-" and tokens != "/" and tokens != "*": eval(f'')ĭef evalRPN(self, tokens: List) -> int: Be aware of the sequence of those two elements extracted from the stack is ( the second last operand in the stack)(operator)(last operand in the stack) -> append the result to the stackįor Python, the following function could be used to simplify the codes. The public key (e) will always be fixed at 65537. Use RSA encryption on the integer string given the public keys (n and e) and output the encrypted integer string. Convert uint8 matrix to a large integer string. Evaluate Reverse Polish Notation (Leetcode Number: 150)Ĭopy the element to the stack if it's operand -> complete the arithmetic operation of the last element and the second last element in the stack when the element of the original list is detected to be an operator. Encrypt the message text by converting to uint8 matrix using UTF-8 representation.
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