New problem complete

problems/1207/main.rs

+use std::collections::HashMap;
+
+pub fn unique_occurrences(arr: Vec<i32>) -> bool {
+    let mut hm = HashMap::<i32, i32>::new();
+    for n in arr {
+        let count = hm.entry(n).or_insert(0);
+        *count += 1;
+    }
+    let mut vals: Vec<&i32> = hm.values().collect();
+    vals.sort();
+    let og_length = vals.len();
+    vals.dedup_by_key(|i| *i);
+    let new_length = vals.len();
+    og_length == new_length
+}
+
+pub fn main() {
+    println!("Expected: true");
+    println!("Got: {}", unique_occurrences(vec![1, 2, 2, 3, 3, 3]));
+}

problems/1207/problem.txt

+Given an array of integers arr, write a function that returns true if and only if the number of occurrences of each value in the array is unique.
+
+ 
+
+Example 1:
+
+Input: arr = [1,2,2,1,1,3]
+Output: true
+Explanation: The value 1 has 3 occurrences, 2 has 2 and 3 has 1. No two values have the same number of occurrences.
+
+Example 2:
+
+Input: arr = [1,2]
+Output: false
+
+Example 3:
+
+Input: arr = [-3,0,1,-3,1,1,1,-3,10,0]
+Output: true
+
+ 
+
+Constraints:
+
+    1 <= arr.length <= 1000
+    -1000 <= arr[i] <= 1000
+

problems/1207/run.sh

+#!/bin/bash
+
+rustc main.rs
+./main
+rm main