Good Number 00:00:00
Two Substrings 00:58:00
Palindrome with leading zeros 01:24:00
John Wick 01:42:15
Solutions :
1- Good Number
https://ideone.com/Y9Qmdg
https://ideone.com/xz46C4
https://ideone.com/Dvy3Eg
2- Two Substrings
https://ideone.com/QNtdE9
3- Palindrome with leading zeros
https://ideone.com/0Wz3Me
4- John Wick
https://ideone.com/odkduz
Codeforces Profile : https://codeforces.com/profile/Saeed_Haroun
