1913C · Game with Multiset

Problem: In this problem, you are initially given an empty multiset. You have to process two types of queries:

1. ADD $x$ — add an element equal to $2^{x}$ to the multiset;
2. GET $w$ — say whether it is possible to take the sum of some subset of the current multiset and get a value equal to $w$.

Input Format: The first line contains one integer $m$ ($1 \le m \le 10^5$) — the number of queries.

Then $m$ lines follow, each of which contains two integers $t_i$, $v_i$, denoting the $i$-th query. If $t_i = 1$, then the $i$-th query is ADD $v_i$ ($0 \le v_i \le 29$). If $t_i = 2$, then the $i$-th query is GET $v_i$ ($0 \le v_i \le 10^9$).

Output Format: For each GET query, print YES if it is possible to choose a subset with sum equal to $w$, or NO if it is impossible.