Doing

Hackerrank

• Determining Dna Health hard Aho-corasick algo

hackerearth

• Samsung challenge maths segment tree
• Amazon-Challenge greedy

SPOJ

• JAVAC string spoj
• BITMAP

PRACTICE GOOGLE CODE JAM

LINK

*Amazon-> count no. of ways % 10^9+7- take at most k kilometers, for x distance home -> kth no. divisible by a or b

• codechef-> ques 4,5,6 *hackerrank-> prime xor , kingdom division (dp) , Abbreviation (dp) , modified fibonacci(dp).