20250413 finished.

src/problem/mod.rs

@@ -595,3 +595,5 @@ mod p3375_minimum_operations_to_make_array_values_equal_to_k;
 mod p2843_count_symmetric_integers;
 
 mod p3272_find_the_count_of_good_integers;
+
+mod p1922_count_good_numbers;