initial commit

rmdupfromsortedarray2/meson.build

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+executable('rmdupfromsortedarray2', 'src/main.cpp', install: true)

rmdupfromsortedarray2/src/main.cpp

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+#include "rmdufromsortedarray2.hpp"
+#include <cassert>
+#include <vector>
+
+int main() {
+  std::vector<int> nums = {1, 1, 1, 2, 2, 3};
+  std::vector<int> expectednums = {1, 1, 2, 2, 3};
+  int k = removeDuplicates(nums);
+  assert(k == int(expectednums.size()));
+  for (int i = 0; i < k; i++)
+  {
+      assert(nums[i] == expectednums[i]);
+  }
+  return 0;
+}

rmdupfromsortedarray2/src/rmdufromsortedarray2.hpp

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+#include <vector>
+
+inline int removeDuplicates(std::vector<int> &nums) {
+  const int n = nums.size();
+  if (n <= 2) return n;
+
+  int i = 2;
+  for (int j = 2; j < n; ++j) {
+    if (nums[j] != nums[i - 2]) [[likely]] {
+      nums[i++] = nums[j];
+    }
+  }
+  return i;
+}