For Fans of Statistics
Have you ever thought about how many people are transported by trams every year in a city with a ten-million population where one in three citizens uses tram twice a day?
Assume that there are n cities with trams on the planet Earth. Statisticians counted for each of them the number of people transported by trams during last year. They compiled a table, in which cities were sorted alphabetically. Since city names were inessential for statistics, they were later replaced by numbers from 1 to n. A search engine that works with these data must be able to answer quickly a query of the following type: is there among the cities with numbers from l to r such that the trams of this city transported exactly x people during last year. You must implement this module of the system.
Input
The first line contains the integer n (0 < n < 70000). The second line contains statistic data in the form of a list of integers separated with a space. In this list, the ith number is the number of people transported by trams of the i-th city during last year. All numbers in the list are positive and do not exceed 10^9 − 1. In the third line, the number of queries q (0 < q < 70000) is given. The next q lines contain the queries. Each of them is a triple of integers l, r and x (1 ≤ l ≤ r ≤ n, 0 < x < 10^9) separated with a space.
Output
Output a string of length q in which the i-th symbol is "1" if the answer to the i-th query is affirmative, and "0" otherwise.