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shyam1909's blog

scanf(%s,arr)" produces WA, while cin >> arr produces AC

By shyam1909, history, 5 years ago, In English

I was solving this problem problem .I encountered a problem while inputting the string . In my first submission i used scanf("%s",arr) which resulted in WA. Then i changed the input method to cin >> arr , then the submission became AC. Submission using scanf -> scanf Submission using cin -> cin

Submission using scanf() worked fine in my pc, but not in codeforces.

Can someone help me why does scanf() doesn't work here? Thanks in advance :)

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5 years ago, hide # |
 
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It is not about your problem but I want to point out something. Instead of writing, bunch of if,else you can use ASCII values of numbers. I mean you can subtract char number from char zero. Thanks to this, you will get intended value.

Example: count += s[i] — ‘0’

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5 years ago, hide # |
 
Vote: I like it +3 Vote: I do not like it

The reason your scanf() is not working is because you actually use ios_base::sync_with_stdio(false); cin.tie(NULL); in your code. It speeds up your cin/cout but disables the sync with scanf/printf so you cannot use both at the same time.

Your code gets AC without ios_base::sync_with_stdio(false); cin.tie(NULL);: 129651408

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