Will you please look into my code whats wrong in this ,, i am not passing all the test cases

#1

link of my code ishttps://ide.codingblocks.com/s/340790
link of the questionhttps://practice.geeksforgeeks.org/problems/remove-b-and-ac-from-a-given-string/0 please check it once and update my error, the error is somewhere around in if loop where i am checking that the current element is equal to a and next is c

#2

Hey @shashank_sabharwal
Erase function will delete characters from string which changes length of the string and affect the loop running so next character will be at current i and not at next i
Here did the req changes https://ide.codingblocks.com/s/340808

#3

why you write i=i-1 in both the if conditions, how erase function effects my for loop , please explain so in future no need to ask you again, please explain with the example , please i want to know which character come and at which position, after erase function

#4

so assume u had “bbx”
for i=0 it finds b and erase it so string becomes “bx”
then at i=1 it checks from x and b is missed
so hence we did i=-1 whenever we erase so it checks from current index only

#5

sir the is still not able to pass all the test cases please check it i already posted the question link

#6

okkk itpasses all the test cases now

#7

recheck I already tried

#8

but sir i have still doubt in this please explain with 2 examples

#9

how my i jump to the posotion which is i+1, in every case , in the second if case i delete 2 elements friom the string but you write i = i-1 in the second case also how??

#10

Say we have
bacxyiac
i=0 we have b we delete it ,string becomes acxyiac
and i increments to 1 so now it will check from c
i=2 x
i=3 y
i=4 i
i=5 we get ac so we we erase it so string becomes acxyi and we stop since str.length() =5>i
Here see whenever we erase we are missing few characters in front of it because string is shifted towards left

So to avoid this we do i-=1 so when loop increments i++ then i is not changes and remains at its current condition

Do dry run yourself to understand better :slight_smile:

#11

please wait ,see you give me the example bacxyiac see first i=0; i found b so b is erased now my string is accyiac and now i=1 which is c here in new string so we again decrement i by 1, so now iwill check from a and according to my second if condition i==a and i+1==c it will erase a and c from this string ac cyiac now my i becomes 2 which is( i )in this but you still write i = i-1 in the second if why ??? this is my doubt pls explain sir, not ale to understand

#12

I becomes 1 not 2 because u

did this

#13

Just print your string in every iteration in your code

#14

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