s0007

src/s0007_reverse_integer.cpp

@@ -0,0 +1,20 @@
+#include "s0007_reverse_integer.hpp"
+
+int Solution::reverse(int x) {
+  int r{0};
+  std::queue<int> queue;
+
+  while (x != 0) {
+    queue.push(x % 10);
+    x = static_cast<int>((x - (x % 10)) / 10);
+  }
+  while (!queue.empty()) {
+    if (r < INT_MIN / 10 || r > INT_MAX / 10) {
+      return 0;
+    }
+    r = r * 10 + queue.front();
+    queue.pop();
+  }
+
+  return r;
+}