String to Integer atoi 🔥| Leetcode 8 | String

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Timestamps:
Problem explanation: 00:00
Approaching the problem: 04:14
Dry Run: 06:53
Code Explanation: 13:15
Complexity Analysis: 16:38

Time Complexity : O(n)
Space Complexity : O(1)

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String to Integer atoi solution
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Комментарии

I am newbie, have two doubts.
1) why we using long to define ans
2)in the line ans=ans*10+s[i]-' 0 ' what is purpose of this one'0'

I hope you will explain it😢😢

selvarajan

I saw multiple video solutions but no one able to clear this much. Good job. Keep doing good work. Thanks!!

susmitapatil

Videos are helpful. Just adding the python version in case anyone needs
class Solution:
def myAtoi(self, str: str) -> int:
# for removing white spaces
str = str.strip()
if not str:
return 0
sign = -1 if str[0] == '-' else 1
str = str[1:] if str[0] in ['-', '+'] else str
res = 0
for char in str:
if not char.isdigit():
break
res = res * 10 + int(char)
if res * sign >= 2**31 - 1:
return 2**31 - 1
if res * sign <= -2**31:
return -2**31
return res * sign

OatsAurCode

You don't know how happy i am after seeing your video in search result...every time.

tusharnain

really great explanation !!!! found this after watching some tuff explaining videos....keep doing well....

eehg

Clear explanation, every second was worth it!!

hemantsharma

Detailed explanation for each case...!!Wow

hrithikrudra

I love your voice❤️, such a nice explanation keep uploading quality content.

raviashwin

Crystal clear Explanation. Thanks! Happy Makar Sankranti ! 😇

ChandraShekhar-bycd

Awesome explanation thanks for providing java solution as well means a lot you're an inspiration

SubhasisNandaYoganeer

Explanation is best. Just wanted to know is cp mandatory for coding rounds of product based companies. If yes then how to begin.

OatsAurCode

thankyou so much for such an easy explanation of this problem <3!!

ishangujarathi

Best explanation among all videos of this prob I have ever You

amarjeetkumarsingh

Very nice, crisp and intutive approach didi thanks a lot

sayanraha

thanks Maam for the crystal and clear explanation 👏👏

MAYANKSINGH-mfll

Thanks Ayushi for this awesome explanation❤❤

allmovies

i think in second while loop, it should be s[i]==' ' instead of s[0]==' ' .

chiragjain

*line 24 & 25* should include equal to also, like this

if( sign==-1 && -1*ans <= INT_MIN ) return INT_MIN;
if( sign==1 && INT_MAX <= ans ) return INT_MAX;

anshumaan

Thanks a lot for this awesome explanation.

vineetkumar

🎯 Key points for quick navigation:

00:02 *Handle leading whitespace*
00:42 *Convert string to integer*
01:25 *Check sign (positive/negative)*
02:08 *Read until non-digit*

Made with HARPA AI

ankithshetty

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