Unhandled Exception:
System.ArgumentNullException: Value cannot be null.
Parameter name: s
at System.Int32.Parse (System.String s) [0x00003] in <6649516e5b3542319fb262b421af0adb>:0
at check1.Program.Main (System.String[] args) [0x0000f] in <ba01538574104275b5b5160bd1715ffd>:0
[ERROR] FATAL UNHANDLED EXCEPTION: System.ArgumentNullException: Value cannot be null.
Parameter name: s
at System.Int32.Parse (System.String s) [0x00003] in <6649516e5b3542319fb262b421af0adb>:0
at check1.Program.Main (System.String[] args) [0x0000f] in <ba01538574104275b5b5160bd1715ffd>:0