1.两数之和(简单)

https://leetcode-cn.com/problems/two-sum/

15.三数之和(中等)

https://leetcode-cn.com/problems/3sum

18.四数之和(中等)

https://leetcode-cn.com/problems/4sum

454.四数相加 II(中等)

https://leetcode-cn.com/problems/4sum-ii

16.最接近的三数之和(中等)

https://leetcode-cn.com/problems/3sum-closest

53.最大子数组和(简单)

https://leetcode-cn.com/problems/maximum-subarray

179.最大数(中等)

https://leetcode-cn.com/problems/largest-number

166.分数到小数(中等)

https://leetcode-cn.com/problems/fraction-to-recurring-decimal

368.最大整除子集(中等)

https://leetcode-cn.com/problems/largest-divisible-subset

1175.质数排列(中等)

https://leetcode-cn.com/problems/prime-arrangements