Added Unique Number of Occurrences

CMakeLists.txt

@@ -1140,4 +1140,15 @@ add_executable(FindTheDifferenceOfTwoArrays
 target_link_libraries(
         FindTheDifferenceOfTwoArrays
         GTest::gtest_main
+)
+
+# Unique Number of Occurrences
+add_executable(UniqueNumberOfOccurrences
+        Easy/UniqueNumberOfOccurrences/include/solution.hpp
+        Easy/UniqueNumberOfOccurrences/tests/test.cpp
+)
+
+target_link_libraries(
+        UniqueNumberOfOccurrences
+        GTest::gtest_main
 )

Easy/UniqueNumberOfOccurrences/include/solution.hpp

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <vector>
+#include <iostream>
+#include <algorithm>
+#include <gtest/gtest.h>
+
+class Solution {
+public:
+    static auto unique_occurrences(const std::vector<int32_t> &arr) -> bool {
+        std::set<int32_t> freq;
+        std::unordered_map<int32_t, size_t> mp;
+
+        for (const auto &element : arr) mp[element]++;
+        for (const auto &val : mp) freq.insert(val.second);
+
+        return freq.size() == mp.size();
+    }
+};

Easy/UniqueNumberOfOccurrences/tests/test.cpp

@@ -0,0 +1,39 @@
+#include "../include/solution.hpp"
+
+class UniqueNumberOfOccurrences : public ::testing::Test {
+protected:
+    ~UniqueNumberOfOccurrences() override = default;
+};
+
+TEST_F(UniqueNumberOfOccurrences, FirstTest) {
+    std::vector<int32_t> elements = {1, 2};
+
+    bool result = Solution::unique_occurrences(elements);
+    bool expected = false;
+
+    ASSERT_EQ(result, expected);
+}
+
+TEST_F(UniqueNumberOfOccurrences, SecondTest) {
+    std::vector<int32_t> elements = {1, 2, 2, 1, 1, 3};
+
+    bool result = Solution::unique_occurrences(elements);
+    bool expected = true;
+
+    ASSERT_EQ(result, expected);
+}
+
+TEST_F(UniqueNumberOfOccurrences, ThirdTest) {
+    std::vector<int32_t> elements =
+            {-3, 0, 1, -3, 1, 1, 1, -3, 10, 0};
+
+    bool result = Solution::unique_occurrences(elements);
+    bool expected = true;
+
+    ASSERT_EQ(result, expected);
+}
+
+auto main(int argc, char **argv) -> int {
+    ::testing::InitGoogleTest(&argc, argv);
+    return RUN_ALL_TESTS();
+}