This is an unusual problem in an unusual contest, here is the announcement: http://codeforces.com/blog/entry/73543

You are given an array $A$ of length $n$, initially filled with zeros. You need to process $q$ queries to the array, each of one of the following types:

1. 1 x y: you need to assign $A_x=y$;
2. 2 l r: you need to print $\sum\limits_{i=l}^r A_i$.

The first line contains an integer $T$ ($1 \leq T \leq 10^5$) — the number of test cases.

Each test case description starts with two integers $n, q$ ($1 \leq n, q \leq 10^5$) — the length of the array and the number of queries. The following $q$ lines contain the description of queries: $1~x~y$ ($1 \leq x \leq n$, $0 \leq y \leq 10^9$) for queries of the first type and $2~l~r$ ($1 \leq l \leq r \leq n$) for queries of the second type.

It is guaranteed that the sum of $n$ as well as the sum of $q$ does not exceed $10^6$.

For each query of the second type print its result on a separate line.