Create program.cpp

2. Programming/1. Data types/Three Latin letters/program.cpp

@@ -0,0 +1,30 @@
+#include <iostream>
+#include <vector>
+#include <string>
+using namespace std;
+int main()
+{
+    int n;
+    std::cin >> n;
+    std::vector<char> letters;
+    for (int i = 97; i < 97 + n; ++i)
+    {
+        letters.push_back(char(i));
+    }
+
+    for (auto a : letters)
+    {
+        for (auto b : letters)
+        {
+            for (auto c : letters)
+            {
+                if (a <= b || b <= c || c <= a)
+                {
+                    std::cout << a << b << c << std::endl;
+                }
+            }
+        }
+    }
+
+    return 0;
+}