CF1792A.GamingForces

Monocarp is playing a computer game. He's going to kill $n$ monsters, the $i$ -th of them has $h_i$ health.

Monocarp's character has two spells, either of which he can cast an arbitrary number of times (possibly, zero) and in an arbitrary order:

• choose exactly two alive monsters and decrease their health by $1$ ;
• choose a single monster and kill it.

When a monster's health becomes $0$ , it dies.

What's the minimum number of spell casts Monocarp should perform in order to kill all monsters?

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 $n$ ( $1 \le n \le 100$ ) — the number of monsters.

The second line contains $n$ integers $h_1, h_2, \dots, h_n$ ( $1 \le h_i \le 100$ ) — the health of each monster.

The sum of $n$ over all testcases doesn't exceed $2 \cdot 10^4$ .

For each testcase, print a single integer — the minimum number of spell casts Monocarp should perform in order to kill all monsters.

In the first testcase, the initial health list is $[1, 2, 1, 2]$ . Three spells are casted:

• the first spell on monsters $1$ and $2$ — monster $1$ dies, monster $2$ has now health $1$ , new health list is $[0, 1, 1, 2]$ ;
• the first spell on monsters $3$ and $4$ — monster $3$ dies, monster $4$ has now health $1$ , new health list is $[0, 1, 0, 1]$ ;
• the first spell on monsters $2$ and $4$ — both monsters $2$ and $4$ die.

In the second testcase, the initial health list is $[2, 4, 2]$ . Three spells are casted:

• the first spell on monsters $1$ and $3$ — both monsters have health $1$ now, new health list is $[1, 4, 1]$ ;
• the second spell on monster $2$ — monster $2$ dies, new health list is $[1, 0, 1]$ ;
• the first spell on monsters $1$ and $3$ — both monsters $1$ and $3$ die.

In the third testcase, the initial health list is $[1, 2, 3, 4, 5]$ . Five spells are casted. The $i$ -th of them kills the $i$ -th monster with the second spell. Health list sequence: $[1, 2, 3, 4, 5]$ $\rightarrow$ $[0, 2, 3, 4, 5]$ $\rightarrow$ $[0, 0, 3, 4, 5]$ $\rightarrow$ $[0, 0, 0, 4, 5]$ $\rightarrow$ $[0, 0, 0, 0, 5]$ $\rightarrow$ $[0, 0, 0, 0, 0]$ .