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-rw-r--r--other/min_deletions_unique_char.cpp28
1 files changed, 28 insertions, 0 deletions
diff --git a/other/min_deletions_unique_char.cpp b/other/min_deletions_unique_char.cpp
new file mode 100644
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--- /dev/null
+++ b/other/min_deletions_unique_char.cpp
@@ -0,0 +1,28 @@
+#include "leetcode.h"
+
+class Solution {
+public:
+ int minDeletions(string s) {
+ vector<int> freq(26, 0);
+ int ans = 0;
+ for (char c : s)
+ freq[c - 'a']++;
+ sort(freq.begin(), freq.end());
+ for (int i = 24; i >= 0; i--) {
+ if (freq[i] == 0)
+ break;
+ if (freq[i] >= freq[i + 1]) {
+ int prev = freq[i];
+ freq[i] = max(0, freq[i + 1] - 1);
+ ans += prev - freq[i];
+ }
+ }
+ return ans;
+ }
+};
+
+int main() {
+ Solution obj;
+ string s = "aab";
+ cout << obj.minDeletions(s);
+}