diff --git a/main.cpp b/main.cpp
index 848c531..bf50347 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,101 +1,15 @@
 #include <iostream>
-#include <random>
-#include <chrono>
 
 using string = std::string;
-void ignoreTillLineEnd();
-string promptfs(string);
-int promptfi(string);
-string guessRank(int);
 
-int main()
-{
-    std::mt19937 rand {std::random_device{}()};
-    std::uniform_int_distribution<int> clamp {1, 100};
-    string name {promptfs("Enter your name:")};
-    std::cout << "Hello " << name << ", welcome to guess the number.\n";
-    int guesses {};
-    int num {clamp(rand)}, ent {};
-    do {
-        if (guesses++ > 0) {
-            if (ent > num)
-                std::cout << "You Guessed Too High!\n";
-            else
-                std::cout << "You Guessed Too Low!\n";
-        }
-        ent = promptfi("Enter your guess:");
-    }
-    while (num != ent);
-    std::cout << "Well done " << name << ", you guessed correctly!\n";
-    std::cout << "You took " << guesses << " guesses, rank " << guessRank(guesses) << " .\n";
-    return 0;
-}
-
-void ignoreTillLineEnd() {
-    std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
-}
-
-string promptfs(string msg) {
-    bool once {};
-    string toret {};
-    do {
-        if (once) {
-            std::cin.clear();
-            ignoreTillLineEnd();
-            std::cout << "Input Failure!\n";
-        }
-        std::cout << msg << "\n";
-        std::cin >> toret;
-        once = true;
-    }
-    while (std::cin.fail());
-    ignoreTillLineEnd();
-    return toret;
-}
-
-int promptfi(string msg) {
-    bool once {};
-    int toret {};
-    do {
-        if (once) {
-            std::cin.clear();
-            ignoreTillLineEnd();
-            std::cout << "Input Failure!\n";
-        }
-        std::cout << msg << "\n";
-        std::cin >> toret;
-        once = true;
-    }
-    while (std::cin.fail());
-    ignoreTillLineEnd();
-    return toret;
-}
-
-string guessRank(int g) {
-    switch (g) {
-    case 0:
-        return "U";
-    case 1:
-        return "A^";
-    case 2:
-        return "A*";
-    case 3:
-        return "A";
-    case 4:
-    case 5:
-        return "B";
-    case 6:
-    case 7:
-        return "C";
-    case 8:
-    case 9:
-    case 10:
-        return "D";
-    case 11:
-    case 12:
-    case 13:
-        return "E";
-    default:
-        return "F";
-    }
+int main() {
+    std::cout << "Enter your age:\n";
+    int age {0};
+    std::cin >> age;
+    if (age < 18)
+        std::cout << age << " is too young.\n";
+    else if (age > 30)
+        std::cout << age << " is too old.\n";
+    else
+        std::cout << age << " is the right age.\n";
 }