Kindly review input structure in problem statement,

the printed part is correct as in the given input you have

2 ( number of tests)

5 4 (Test input #1: 5 containers and 4 queries for this test case)

1 5 (Query #1)

3 2 (Query #2)

4 1 (Query #3)

2 4 (Query #4)

then

4 2 (Test input #2: 4 containers, 2 queries)

1 2 (Query #1)

4 3 (Query #2)

note that twoRobots() is called for each test input