10924 - Prime Words

[fuad420]

How comes 1 a prime number?????????!!!!!!!! that is really funny and joking.

[bishop]

it show prime num 1
but still Wrong answer
plz help for

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deleted



thanks
but in upper post
1,3,5...... odd number denoted by prime number
so i thought 2 is not prime

[Rocky]

u need to check ur code again.it need too many modification....
u do p[2]=false but 2 is prime....
again u loop from 3 up to 35....but what happen for 4,8,....it is not prime too.
and ur sum is also incorrect for UPPERCASE.check it.

GOOD LUCK
Rocky

[starrynight]

excuse me ,can anyone tell me why I got a WA?
because I can't find where I do wrong .
thanks in advance
and sorry for my poor English..

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#include<stdio.h>
#include<math.h>
#include<string.h>
int main()
{
   
    char word[21];
    double sum=0;
    int i,y,factor;
   
   
       
   
    while(gets(word) != NULL)
    {
       factor=0;
       
       for(i=0;i<20;i++)
       {
          if(word[i]>='a' && word[i]<='z')
              sum = sum +(word[i]-96);
          else if(word[i]>='A' && word[i]<='Z')
              sum = sum +(word[i]-38);
       }
       
       for (y = 2; y <= sqrt(sum); y++)
       {
         if ( fmod(sum,y)==0 )
          factor++;
       }
       
       if (factor == 0)
          printf("It is a prime word.\n");
       else
          printf("It is not a prime word.\n");
         
       
         
     }
   
    return 0;
}
   


[helloneo]

Try this case..

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a
b
c
d
e
A
B
C
D
E


My output is..

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It is a prime word.
It is a prime word.
It is a prime word.
It is not a prime word.
It is a prime word.
It is not a prime word.
It is not a prime word.
It is a prime word.
It is not a prime word.
It is a prime word.


[laicc86]

Code: Select all

removed* 


can anyone help me? i don't know why i got WA for this.

[helloneo]

gets returns NULL instead of EOF at the end of input..


PS. remove your code after AC..

[laicc86]

gets returns NULL instead of EOF at the end of input..


PS. remove your code after AC..

thx for helping~ but i still get WA after i changed the EOF to NULL

[turcse143]

It is very simple problem.
Use the ASCII value & subtract to generate the number check number is prime or not.
For reducing the time u will generate all the prime of the given range before.

[ligregni]

hi!, this is my code

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/* Prime Words */

REMOVED, got AC


I tried all the single letters, the example cases, the test cases here, and I still getting WA with almost no time (sometimes 0.010 or other times 0.000), I also tried not to print the '\n' at the end

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if (1)
         printf("\n");

changed by

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if (c!=EOF)
         printf("\n");

and it is the same.

Please HELP!!!

I have SOME ADVICES!

an EMPY string should NOT to print ANYTHING

1 is prime

print a \n after ALL cases

[/quote]

[aliahmed]

AC.

[sazzadcsedu]

whats wrong with this code!!!!!!!!!

i got WA.
try my best.but cant find the problem.
plz plz someone help.
here is my code

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removed after being AC.


[mf]

whats wrong with this code!!!!!!!!!

i got WA.

Oh really? I think you should have got compile error with the code you've posted.

After you fix it, you might want to check again this part of your code:

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              memset(prime,0,sizeof(prime));

                for(i=2;i<=20;i++)

                  {
                     for(j=2;j<=60;j++)

                     {   
                        prime[i*j]=1;

                                                   }
                 }

E.g. 1018=2*519 is composite, but your code would claim it's not.

Horrible indenting, btw. If it's not caused by a forum bug (tab=3 spaces), I think you really need to learn some good indenting style.

[sazzadcsedu]

Infact i made a stupid mistake.
but now got AC.
thanx a lot mf.
need ur help later(comming!!!).

[DD]

I think the only thing we should take case for this problem is that "1 is prime".