Initial commit: Modular Clang C++ Nix environment and problem files

code/1415.the-k-th-lexicographical-string-of-all-happy-strings-of-length-n.cpp

@@ -0,0 +1,5 @@
+class Solution {
+public:
+    string getHappyString(int n, int k) {
+    }
+};

code/1415.the-k-th-lexicographical-string-of-all-happy-strings-of-length-n.rs

@@ -0,0 +1,5 @@
+impl Solution {
+    pub fn get_happy_string(n: i32, k: i32) -> String {
+        
+    }
+}

code/1415.the-k-th-lexicographical-string-of-all-happy-strings-of-length-n.tests.dat

@@ -0,0 +1,6 @@
+1
+3
+1
+4
+3
+9