Topic:
Given two integers a and B, it is required not to use ' + ' and '-' to return the and of the two integers.
Ideas for solving problems:
Because the subtraction symbol cannot be used, it is considered that the bitwise-and-bitwise-OR-bitwise

For large integer calculations, it is common to use some method of conversion, otherwise it will overflow. But Python has no such concerns. Python supports "infinite precision" integers, generally without the problem of integer overflow, and the

Topic link
The original title of https://leetcode.com/problems/sum-of-two-integers/
Calculate the sum of two integers a and B, but you are don't allowed to use the operator + and-.
Example:Given A = 1 and b = 2, return 3. Title

Tag: Size description tin GitHub Ace alt return TPS overflow#problemMultiply large integers#Idea Description python support * * "infinite precision" integer, * * Generally do not consider the problem of integer overflow, and python A long

Euclidean algorithm-Calculates the greatest common divisor of two positive integers a, b #定理:gcd (A, a, b) = gcd (b, a mod) Termination condition: Remainder equals 0 Return result: The remainder equals 0 o'clock divisor b #-*-Coding:utf-8-*-__author_

730. All subsets of and
Topic
To an integer n, we need to find the sum of all the elements in all possible subsets of the set of the first n natural numbers.
ExamplesGive n = 2, return 6Possible subsets are {{1}, {2}, {1, 2}}.subset of elements

Recently in the "Jian Point offer", face question 32 of the topic: Enter an integer n, the number from 1 to n decimal representation of the n integer 1 occurrences. For example, input 12, from 1 to 12 of these integers contain 1 of the numbers are 1,

Question:
Calculate the sum of two integers A and B, but you are not allowed to use the operator + and -.
Solution:
Use the Calculator
Code:
Class solution: def getsum (self, num1, num2): If (num2 = 0): Return num1 sum = num1 ^ num2 carry =

Problem:Divide-integers without using multiplication, division and mod operator.If It is overflow, return max_int.Solution: Can not be multiplication on the line, but one problem is that the addition and subtraction may be too slow, so need to

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