Initial commit

9/9.cpp

@@ -0,0 +1,46 @@
+#include <iostream>
+#include <vector>
+
+namespace {
+
+class Solution {
+public:
+    bool isPalindrome(int x) {
+        if (x < 0)
+            return false;       
+
+        std::vector<int> v;       
+        v.reserve(32);
+
+        while (x > 0) {
+            int z = x % 10;
+            x = x / 10;
+            v.emplace_back(z);
+        }
+
+        for (size_t i = 0; i < v.size(); ++i) {
+            if (v[i] != v[v.size() - 1 - i])
+                return false;
+        }
+
+        return true;
+    }
+};
+
+};
+
+#include <gtest/gtest.h>
+
+Solution s;
+
+TEST(P9, 1) {
+    EXPECT_EQ(s.isPalindrome(121), true);
+}
+
+TEST(P9, 2) {
+    EXPECT_EQ(s.isPalindrome(-121), false);
+}
+
+TEST(P9, 3) {
+    EXPECT_EQ(s.isPalindrome(10), false);
+}