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-rw-r--r--unique_num_occurrences.cpp24
1 files changed, 24 insertions, 0 deletions
diff --git a/unique_num_occurrences.cpp b/unique_num_occurrences.cpp
new file mode 100644
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--- /dev/null
+++ b/unique_num_occurrences.cpp
@@ -0,0 +1,24 @@
+#include "leetcode.h"
+
+class Solution {
+public:
+ bool uniqueOccurrences(vector<int> &arr) {
+ short m[2001] = {};
+ for (auto n : arr)
+ ++m[n + 1000];
+ sort(begin(m), end(m));
+ for (auto i = 1; i < 2001; ++i)
+ if (m[i] && m[i] == m[i - 1])
+ return false;
+ return true;
+ }
+};
+
+int main() {
+ Solution obj;
+ vector<int> arr = {1, 2, 2, 1, 1, 3};
+ if (obj.uniqueOccurrences(arr))
+ cout << "true";
+ else
+ cout << "false";
+}