| ID | PROBLEM | DIFFICULTY | SOLVED | ||
|---|---|---|---|---|---|
| M111 | Number of distinct elements | Maps and sets | Easy | 0/0 | |
| M112 | How many times each number occurs | Maps and sets | Easy | 0/0 | |
| M113 | Most frequent number | Maps and sets | Easy | 0/0 | |
| M114 | Remove duplicates | Maps and sets | Easy | 0/0 | |
| M115 | Is it a permutation | Maps and sets | Easy | 0/0 | |
| M116 | Letters missing from a string | Maps and sets | Easy | 0/0 | |
| M117 | Intersection of two arrays | Maps and sets | Easy | 0/0 | |
| M118 | Anagram | Maps and sets | Easy | 0/0 | |
| M119 | Word frequencies | Maps and sets | Medium | 0/0 | |
| M120 | Rows similar to the first one | Maps and sets | Medium | 0/0 |
