initial commit

twopointers/meson.build

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

twopointers/src/main.cpp

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+#include "twopointers.hpp"
+#include <cassert>
+#include <iostream>
+
+int main() {
+  std::vector<int> nums = {3,2,2,3};
+  int val = 3;
+  int k = removeElement(nums, val);
+  for (int i = 0; i < k; i++) {
+      std::cout << "num: " << nums[i] << std::endl;
+  }
+  std::cout << "k: " << k << std::endl;
+  return 0;
+}

twopointers/src/twopointers.hpp

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+#include <vector>
+
+inline int removeElement(std::vector<int> &nums, int val) {
+  int k = 0;
+  for (int i = 0; i < int(nums.size()); i++) {
+    if (nums[i] != val) {
+      nums[k] = nums[i];
+      k += 1;
+    }
+  }
+  return k;
+}