Merge pull request #74 from FrankKair/cpp-004

Feat: Adds C++ 004

src/004/p004.cpp

@@ -0,0 +1,29 @@
+#include <iostream>
+using namespace std;
+
+int reverse(int n) {
+    int v = n, rv = 0;
+    do {
+        rv = (rv*10) + (v%10);
+        v = v/10;
+    } while (v > 0);
+    return rv;
+}
+
+int solve() {
+    int v = 0;
+    for (int i = 999; i > 99; i--) {
+        for (int j = 999; j > i-100; j--) {
+            v = i * j;
+            if (v == reverse(v)) {
+                return v;
+            }
+        }
+    }
+    return 0;
+}
+
+int main() {
+    int result = solve();
+    cout << result << endl;
+}