A13209 · Dream Team · GESP考级

题目描述

The first line contains one integer $t$ ( $1 \le t \le 10^4$ ) — the number of test cases. Then $t$ test cases follow. Each test case begins with a line containing one integer $n$ ( $2 \le n \le 10^5$ ) — the number of developers "on the bench". The second line of a test case contains a sequence of integers $a_1, a_2, \dots, a_n$ ( $-10^4 \le a_i \le 10^4$ ) — the characteristics of the $n$ developers. It is guaranteed that the characteristics are such that the sum of the characteristics in the answer is strictly positive. It is guaranteed that the sum of $n$ over all test cases in the input doesn't exceed $10^5$ .

Print the answers for the given $t$ test cases in the order that they appear in the input. In the first line of each answer, print a positive integer $s$ — the sum of the characteristics in the desired subset. The second line should contain only the characters 0 and 1 and match the answer: - the character in the $i$ -th position should be equal to 1 if the $i$ -th developer belongs to the team; - the character in the $i$ -th position should be equal to 0 if the $i$ -th developer does not belong to the team. If there are several answers, print any of them.

In the first test case, the maximum subset $a_1, a_3, a_5$ has a sum equal to $3$ , so Polycarp should choose a team with the maximum total sum which is less than $3$ . In the second test case, the maximum subset $a_1, a_2$ has a sum equal to $12$ , so Polycarp should choose a team with the maximum total sum which is less than $12$ . In the third test case, the maximum subset $a_1, a_3$ has a sum equal to $9$ . In the fourth test case, the maximum subset $a_1, a_2$ has a sum equal to $8$ . In the fifth test case, there are several subsets with a maximum sum equal to $3$ , so Polycarp should choose a team with a lower total sum.

输入 #1

5
5
1 -1 1 -1 1
2
11 1
3
5 -3 4
3
5 3 -4
5
-1 0 3 -3 0

输出 #1