CF 1780A:Hayato and School
Today Hayato came home from school with homework.
In the assignment, Hayato was given an array a of length n. The task was to find 3
?numbers in this array whose sum is odd. At school, he claimed that there are such 3
?numbers, but Hayato was not sure, so he asked you for help.
Answer if there are such three numbers, and if so, output indices i, j, and k such that ai+aj+ak is odd.
The odd numbers are integers that are not divisible by 2: 1, 3, 5, and so on.
Input
The first line contains a single integer t (1≤t≤104) — the number of test cases.
For each test case, the first line contains one integer n (3≤n≤300) — the length of a
The second line contains n integers a1,a2,…,an (1≤ai≤105) — the array a
It is guaranteed that the sum of n over all test cases does not exceed 2?105
Output
For each test case, in the first line print one word "YES" (without quotes) if there are 3
?numbers with an odd sum or "NO" (without quotes) if there are no such 3 numbers.
If the answer exists, then on the second line print 3 distinct integers i,j,k (1≤i,j,k≤n) — the indices of the numbers. If there are several answers, output any.
Example
input
6
3
1 1 1
4
1 1 2 2
3
1 2 3
5
1 4 5 1 2
4
2 6 2 4
5
5 6 3 2 1
output
YES
1 2 3
YES
3 4 1
NO
YES
1 3 4
NO
YES
1 3 5
Note
In the first test case, there is one way to choose 3 numbers, and since 1+1+1=3, this triple is fine for us.
In the second test case, you need to choose the numbers 1,2,2, since 1+2+2=5
In the third test case, there is one way to choose three numbers, but 1+2+3=6 is an even number, so the required triple does not exist.
In the fifth test case, no matter what three numbers we choose, their sum is even.
找到3個索引值使得這個數(shù)組的和是奇數(shù),如果不是輸出NO,如果是輸出yes跟對應(yīng)的索引值
如果是奇數(shù),要么三個都是奇數(shù),要么一個奇數(shù),2個偶數(shù);
依次判斷即可:
下面是代碼: