Why the condition of while is showing error?

#1
#2

hello @supratik260699
s1 is an string and ā€˜\nā€™ is a charater .

thats why it is giving error.

ur while loop should look like.
s1[i] != '\0ā€™

#3

one test caseis not correct can u please check I am not able to find any mistake

#4

@supratik260699
print output for each test case in separate line