Preparing for ICPC

Can anybody tell me how to prepare for ICPC? My team got selected for onsite rounds(Amritapuri and Gwalior) by solving one and two problems respectively. I know I have only one month left and I can’t go to top positions but I want my team to solve three-four problems in amritapuri and at least three in Gwalior round. Is it possible? How should I prepare?

I have solved more than 100 problems in codechef but all were easy adhoc and simple math problems. I solved some algorithmic problems (like graph traversing, fenwick tree, some string problems(edit distance,LCS),sieve etc) but all in practice session (never in real contest time).

Can anyone give me some tips?