Remove elements

src/s0027_remove_element.cpp

@@ -1,18 +1,14 @@
 #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;
+  int len = nums.size();
+  int f{0}, s{0};
+  while (f < len) {
+    if (nums[f] != val) {
+      nums[s] = nums[f];
+      ++s;
     }
+    ++f;
   }
-  return slow;
+  return s;
 }

src/s0283_move_zeroes.cpp

@@ -0,0 +1,20 @@
+#include "s0283_move_zeroes.hpp"
+
+void Solution::moveZeroes(vector<int>& nums) {
+  int len = nums.size();
+  if (len <= 1) {
+    return;
+  }
+  int s{0}, f{0};
+  while (f < len) {
+    if (nums[f] != 0) {
+      nums[s] = nums[f];
+      ++s;
+    }
+    ++f;
+  }
+  while (s < len) {
+    nums[s] = 0;
+    ++s;
+  }
+}