I sincerely suggest u not to follow solutions. that will take u no where. Try to crack problems on ur own --- If u are unable to solve even after many serious attempts, then discuss with ur friends --- if even that doesnt work, then ask ur teacher -- only if all the previous steps fail, u have to go to solutions as the initials steps makes u strong in problem cracking skill, though it takes a lot of time...
Satyaram B V,
General Secretary, Mandakini Hostel,
IIT Madras