제출 #169866

2 4
ec
a
ec
d
a
ce

런타임 에러 (RTE)
stderr:
 Unhandled exception. System.ArgumentNullException: Value cannot be null. (Parameter 'key')
   at System.Collections.Generic.Dictionary`2.TryInsert(TKey key, TValue value, InsertionBehavior behavior)
   at System.Collections.Generic.Dictionary`2.Add(TKey key, TValue value)
   at Program.Main() in Program.cs:line 20

2
a
ec

3 2
dee
ada
edc
ada
dee

런타임 에러 (RTE)
stderr:
 Unhandled exception. System.ArgumentNullException: Value cannot be null. (Parameter 'key')
   at System.Collections.Generic.Dictionary`2.TryInsert(TKey key, TValue value, InsertionBehavior behavior)
   at System.Collections.Generic.Dictionary`2.Add(TKey key, TValue value)
   at Program.Main() in Program.cs:line 20

2
ada
dee

4 4
b
e
ea
da
ea
b
da
e

런타임 에러 (RTE)
stderr:
 Unhandled exception. System.ArgumentNullException: Value cannot be null. (Parameter 'key')
   at System.Collections.Generic.Dictionary`2.TryInsert(TKey key, TValue value, InsertionBehavior behavior)
   at System.Collections.Generic.Dictionary`2.Add(TKey key, TValue value)
   at Program.Main() in Program.cs:line 20

4
b
da
e
ea