leetcode_easy_hashmap
problem
1207. Unique Number of Occurrences
solution #1: 多个map或者set;
code
solution #2: 排序判断；
code
参考
1. leetcode_1207. Unique Number of Occurrences;
2. cplusplus_map;
完
【leetcode_easy】1207. Unique Number of Occurrences
原文：https://www.cnblogs.com/happyamyhope/p/13372498.html