problem : http://www.codechef.com/COOK39/problems/PPLUCKY My idea :

• If I get digit 4 , then this 4 will not effect any 7 before this position.

• If currently i get 7 and i have one or more unused 4, then i will have a pair 47 in any iteration . Now, I have to find in which iteration i will get this pair.

• I can get this iteration number greedly and can get total number of pair erased before this position using RMQ.

My implementations :

http://pastebin.com/7RBu4Gs5 1. http://www.codechef.com/viewsolution/2863273 2. http://www.codechef.com/viewsolution/2859710

No idea , why WA . Need critical input ........

Thanks in advance

Prolem Link : http://www.codechef.com/COOK33/problems/LEFEED

please , help me , i cant get , why i have got RTE ( Or TLE as admin said : "Some of you might be getting RTE instead for TLE for you solutions" ) ...... My Solution which got RTE verdict : http://www.codechef.com/viewsolution/2068995

An Accepted Code :

http://www.codechef.com/viewsolution/2068851

Please help me finding my mistake ......