Z algorithm problems

	Problem Name	Online Judge	Contest	Difficulty Level
1	Query Problem	SPOJ		2
2	Password	Codeforces	Codeforces Beta Round #93 (Div. 1 Only) & Codeforces Beta Round #93 (Div. 2 Only)	2
3	Ancient Prophesy	Codeforces	Codeforces Round #158 (Div. 2)	4