s0027

include/s0027_remove_element.hpp

@@ -0,0 +1,13 @@
+#ifndef S0027_REMOVE_ELEMENT
+#define S0027_REMOVE_ELEMENT
+
+#include <vector>
+
+using namespace std;
+
+class Solution {
+ public:
+  int removeElement(vector<int>& nums, int val);
+};
+
+#endif

src/s0027_remove_element.cpp

@@ -0,0 +1,18 @@
+#include "s0027_remove_element.hpp"
+
+int Solution::removeElement(vector<int>& nums, int val) {
+  int size = nums.size();
+  if (size == 0) {
+    return 0;
+  }
+  int fast{0}, slow{0};
+  for (; fast < size; ++fast) {
+    if (nums.at(fast) == val) {
+      continue;
+    } else {
+      nums[slow] = nums.at(fast);
+      ++slow;
+    }
+  }
+  return slow;
+}

tests/s0027_remove_element.cpp

@@ -0,0 +1,19 @@
+#include "s0027_remove_element.hpp"
+
+#include <gtest/gtest.h>
+
+TEST(Problem27, Case1) {
+  vector<int> nums{3, 2, 2, 3};
+  int val{3};
+  int o{2};
+  Solution solution;
+  EXPECT_EQ(solution.removeElement(nums, val), o);
+}
+
+TEST(Problem27, Case2) {
+  vector<int> nums{0, 1, 2, 2, 3, 0, 4, 2};
+  int val{2};
+  int o{5};
+  Solution solution;
+  EXPECT_EQ(solution.removeElement(nums, val), o);
+}