Merge pull request youngyangyang04#2692 from zhangwt-cn/master

fix: 更正数组下`区间和`重复问题

Author: youngyangyang04

Diff for: README.md

@@ -107,7 +107,6 @@
 5. [数组：209.长度最小的子数组](./problems/0209.长度最小的子数组.md)
 6. [数组：区间和](./problems/kamacoder/0058.区间和.md)
 6. [数组：59.螺旋矩阵II](./problems/0059.螺旋矩阵II.md)
-7. [数组：区间和](./problems/kamacoder/0058.区间和.md)
 8. [数组：开发商购买土地](./problems/kamacoder/0044.开发商购买土地.md)
 9. [数组：总结篇](./problems/数组总结篇.md)