Block Towers
Description
There are $n$ block towers, numbered from $1$ to $n$. The $i$-th tower consists of $a_i$ blocks.
In one move, you can move one block from tower $i$ to tower $j$, but only if $a_i > a_j$. That move increases $a_j$ by $1$ and decreases $a_i$ by $1$. You can perform as many moves as you would like (possibly, zero).
What's the largest amount of blocks you can have on the tower $1$ after the moves?
The first line contains a single integer $t$ ($1 \le t \le 10^4$) — the number of testcases.
The first line of each testcase contains a single integer $n$ ($2 \le n \le 2 \cdot 10^5$) — the number of towers.
The second line contains $n$ integers $a_1, a_2, \dots, a_n$ ($1 \le a_i \le 10^9$) — the number of blocks on each tower.
The sum of $n$ over all testcases doesn't exceed $2 \cdot 10^5$.
For each testcase, print the largest amount of blocks you can have on the tower $1$ after you make any number of moves (possibly, zero).
Input
The first line contains a single integer $t$ ($1 \le t \le 10^4$) — the number of testcases.
The first line of each testcase contains a single integer $n$ ($2 \le n \le 2 \cdot 10^5$) — the number of towers.
The second line contains $n$ integers $a_1, a_2, \dots, a_n$ ($1 \le a_i \le 10^9$) — the number of blocks on each tower.
The sum of $n$ over all testcases doesn't exceed $2 \cdot 10^5$.
Output
For each testcase, print the largest amount of blocks you can have on the tower $1$ after you make any number of moves (possibly, zero).
4
3
1 2 3
3
1 2 2
2
1 1000000000
10
3 8 6 7 4 1 2 4 10 1
3
2
500000001
9
Note
In the first testcase, you can move a block from tower $2$ to tower $1$, making the block counts $[2, 1, 3]$. Then move a block from tower $3$ to tower $1$, making the block counts $[3, 1, 2]$. Tower $1$ has $3$ blocks in it, and you can't obtain a larger amount.
In the second testcase, you can move a block from any of towers $2$ or $3$ to tower $1$, so that it has $2$ blocks in it.
In the third testcase, you can $500000000$ times move a block from tower $2$ to tower $1$. After that the block countes will be $[500000001, 500000000]$.