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1. 函数 数组 指针相关 1.1 定义并简单使用指针 c++ // 函数声明 void swap(int &x, int &y); int main() { // 局部变量声明 int a = 100; int b = 200; cout 阅读全文
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0. 迷之 和 . 箭头（ ）：左边必须为指针； 点号（.）：左边必须为实体。 e.g.1 class e.g.2 struct 阅读全文
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My Stuck in C++ Zhong Liang Xiang Oct. 1st, 2017 这个专题记录了对于我而言, c++迷一样的东西. 阅读全文
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Given an array of integers and an integer $k$, find out whether there are two distinct indices $i$ and $j$ in the array such that nums[i] = nums[j] an 阅读全文
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Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the arr 阅读全文
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189. Rotate Array Rotate an array of $n$ elements to the right by $k$ steps. For example, with $n = 7$ and $k = 3$, the array is rotated to . Related 阅读全文
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169. Majority Element Given an array of size $n$, find the majority element. The majority element is the element that appears more than times. You may 阅读全文
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122. Best Time to Buy and Sell Stock II 为获得最高收益而多次买卖,但只能像这样买卖: $O(n)$ time, $O(1)$ space. 自家代码: 阅读全文
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167. Two Sum II Input array is sorted Given an array of integers that is already sorted in ascending order , find two numbers such that they add up to 阅读全文
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121. Best Time to Buy and Sell Stock Example 1: Example 2: 同53题. The maximum (minimum) subarray problem. 用到$DP$. 这题是重点 : 就是序列从A[0]开始计算, 不符合条件就清0, 从断处继 阅读全文