ZOJ Problem Set - 2132
Seven (actually six) problems may be somewhat few for a contest. But I am really unable to devise another problem related to Fantasy Game Series. So I make up an very easy problem as the closing problem for this contest.
Given a sequence of numbers A, for a number X if it has the most instances (elements of the same value as X) in A, then X is called one of the most frequent numbers of A. Now a sequence of numbers A of length L is given, and it is assumed that there is a number X which has more than L / 2 instances in A. Apparently X is the only one most frequent number of A. Could you find out X with a very limited memory?
Input contains multiple test cases. Each test case there is one line, which starts with a number L (1 <= L <= 250000), followed by L numbers (-2^31 ~ 2^31-1). Adjacent numbers is separated by a blank space.
There is one line for each test case, which is the only one most frequent number X.
5 2 1 2 3 2 8 3 3 4 4 4 4 3 4
The worst epilogue of fate. The end of all.
Author: CHEN, Shixi
Source: Online Contest of Fantastic Game