Programmer Group

The number i that appears only once Title Description Topic analysis When I first looked at the question of xxxx, I had no idea at all. The method is too inefficient. Later, I saw on the Internet that the solution uses XOR, but I haven't understood what the principle is. Recently, the school is learning "the principle of computer ...

[problem description] the classroom seats in sun's school can be reserved every day. A person can occupy multiple seats and must have consecutive seats. If he can't occupy so many seats he requires, he won't want any more. In order to reduce the difficulty, seats are allocated from small to large according to the seat number each time, and seat ...

Write before: In many scenarios, we need to apply for memory dynamically, but the use of dynamic memory is prone to problems, because it is extremely difficult to ensure that the memory is released at the right time. Sometimes we forget to release memory. This situation will lead to memory leakage, which is difficult to find, because the ph ...

Binary Search introduce Binary search, also known as half search, logarithmic search.Is an algorithm used to find a number in an ordered array. Example Title Description Given an ordered ascending integer array of n elements, nums, and a target value, write a function to search for the target in nums, and return -1 if the target value has ...

Chapter 14 overloaded operators and type conversion 14.1 basic concepts A unary operator has one argument Binary operator: the left operand is passed to the first parameter, and the right operand is the second parameter Except overloaded function call operator(), it cannot contain default arguments If the operator function is a member func ...

Summary: SLIC: simple linear iterative clustering, a simple linear iterative clustering, uses k-means clustering to generate super-pixels, which is simple to implement, efficient to run, and has a better boundary preservation effect. The specific results compared with other methods are detailed in the following paper. Paper address:https: ...

1. Why do I need a smart pointer?    when using pointers, we generally need to apply for a piece of memory space from the memory for use, but if we forget to release the block space, it will cause memory leakage.    and if the program has exception handling and throws an exception when applying for memory usage time, th ...

1. General "A good memory is better than a bad pen". This article is the first article of "difficult and miscellaneous diseases encountered". This article mainly introduces the STL stable encountered in today's work_ The problem of custom comparison function of sort algorithm is only a superficial introduction. The specific ...

The book Thinking in C + + discusses object slicing as follows: if a derived class object is forcibly transformed upward into a base class by passing values instead of pointers and references, the derived class object will be cut into a base class object after upward transformation, that is, the unique member variables and methods in the derive ...

Integer division thinking Cross border problem Critical point negative 0x8000000, positive 07fffffConvert a and b to negative numbers, and the highest bit can be used.The problem becomes a loop, which is a < = BCritical point: a==0 return 0;if ((a == 0x80000000 && b == -1) || (a == 0x7fffffff && b ...