How to take 10^100 no. As input.

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this is the problem from hackerearth.com

how can we take 10^100 as input in c and c++.

What I have tried:

long long int but its range is not that much

Posted 27-Nov-17 5:22am

jatinp510

Updated 27-Nov-17 7:31am

OriginalGriff

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CHill60 27-Nov-17 11:53am

Double?

jatinp510 27-Nov-17 11:54am

not working

Dave Kreskowiak 27-Nov-17 12:02pm

Did you want to define "not working" because that's not a problem description. That's a complaint.

What do you see, what errors do you get, any unexpected values in the variables you're using, ...?

We also can't see your code and that's a big part of getting a problem solved.

jatinp510 27-Nov-17 12:06pm

i guess double can't store value of 10^100.

doubles don't have that much range.

jeron1 27-Nov-17 12:24pm

I imagine you are going to have to use custom big integer class like GitHub - sercantutar/infint: Arbitrary-Precision Integer Arithmetic[^], you could google bigint to see what else may exist,

jatinp510 27-Nov-17 12:30pm

somebody suggest me to
create char array.
how is it done.
and why its neends to be done.

Richard MacCutchan 27-Nov-17 12:37pm

The whole point of hackerearth is that you use your knowledge and experience, and especially your brain, to solve the problems.

jatinp510 27-Nov-17 12:43pm

sooo... is it crime to ask why for any query

Richard MacCutchan 27-Nov-17 12:50pm

No, but you are expected to do most of the work. These forums are where you ask for help when your code does not do what you expect.

jatinp510 27-Nov-17 12:54pm

sir, i have tried on my level.
if someone gave me suggestion.
i just want to know how and why creating char array will help.

i just need explaination.
u r expericed peoples and can share your knowlenge with this noob.

Richard MacCutchan 28-Nov-17 3:45am

Forget this problem and forget hackerearth. Get yourself a good study guide or book on C++ and work through it a few times, so you fully understand the basic principles of computer data structures, and how to manipulate them. Trying to learn programming from problems that you really do not understand, and asking questions here, is not going to work.

jatinp510 27-Nov-17 13:07pm

thnku sir.... :)
your words helps me :)

#include <stdio.h>
#include<string.h>

int main()
{

int t,len,u;
scanf("%d",&t);
while(t--)
{
char a[101];
scanf("%s",&a);
len=strlen(a);
u=a[len-1];

if(u%2==0)
printf("YES\n");
else
printf("NO\n");
}
return 0;
}

Richard MacCutchan 28-Nov-17 3:48am

See my comment above.

Dave Kreskowiak 27-Nov-17 15:23pm

If you're asking this question, what are you doing on HackerEarth? That site provides a bunch of tough problems to solve when you have to apply your EXPERIENCE to solve them.

This question says that you don't have much, if any, experience in C/C++ or breaking problems down into simple parts.

HackerEarth is NOT a site that's going to teach you how to write code.

jatinp510 28-Nov-17 0:08am

soo.. how to pratice coding.

Dave Kreskowiak 28-Nov-17 0:12am

Truthfully, books.

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CPallini · Accepted Answer · 2017-11-27T07:31:00

Solution 1

Read carefully the requirements. They asked you to establish if a number can be exactly divided by two (is even). You know, you have to test only the last digit. Hence you don't even need an array: read and discard all but last digit, then test the last digit for even or odd parity.

Posted 27-Nov-17 7:31am

CPallini

Comments

jatinp510 27-Nov-17 13:36pm

#include <stdio.h>
#include<string.h>

int main()
{

int t,len,u;
scanf("%d",&t);
while(t--)
{
char a[101];
scanf("%s",&a);
len=strlen(a);
u=a[len-1];

if(u%2==0)
printf("YES\n");
else
printf("NO\n");
}
return 0;
}

sir,i have tried this.
is this correct method.

CPallini 27-Nov-17 13:38pm

This is one of the possible solutions.

jatinp510 27-Nov-17 13:42pm

can u suggest me other solutions.
what else i can try.