where we can get previous year acm prelimaniary round question of asia region india regions
world finals problems:-
https://icpc.baylor.edu/worldfinals/problems
https://icpc.kattis.com/problems
India finals 2016:-
ACM-ICPC Asia-Kolkata Onsite 2016:-
ACM-ICPC Asia-Amritapuri 2016:-
ACM-ICPC Asia-Chennai 2016:-
ACM-ICPC Asia-Kharagpur2016:-
ACM-ICPC India Regionals, Online Preliminary Round 2016:-
For more regional onsite problem goto:-
and search for the contest.