OJ Board

Posted: **Sat Mar 17, 2007 3:52 pm**

Try the cases...

Input:

Output:

Code: Select all

58 base 10 = 3A base 16
44 base 10 = 134 base 5
62342 base 10 = 1111001110000110 base 2
1 base 10 = 1 base 13

Hope these help.

Posted: **Sun Mar 18, 2007 10:56 am**

removed

Posted: **Sun Mar 18, 2007 12:03 pm**

I have tried this input as follows:

Code: Select all

2 2 0001

according to your code the output is

Code: Select all

0001 base 2 = 0001 base 2
0001 base 2 = 110010000000101000011101010001 base 2

but correct output is

Code: Select all

1 base 2 = 1 base 2

you should omit the leading zeros and as well as your repetance your output.
Best of luck

Posted: **Sun Mar 18, 2007 12:08 pm**

jainal cse du wrote:jan bhai,
I have changed my code as following and it gives correct result for these inputs . but I am still getting WA.

Try the cases...

Input:

Code: Select all

14 14 5A144D49
16 16 4

Output:

Code: Select all

5A144D49 base 14 = 5A144D49 base 14
4 base 16 = 4 base 16

'pow' function returns 'double', not integer. So, it can make precision errors. And you can easily get rid of it.
Replace

Code: Select all

   for(i = 0; str[i]; i++) 
   { 
      if(str[i] > '9') 
         digit = str[i] - 55; 
      else 
         digit =  str[i] - 48; 
      num += digit * pow(f_base,power); 
      power--; 
   }

with

Code: Select all

   for(i = 0; str[i]; i++) 
   { 
      if(str[i] > '9') 
         digit = str[i] - 55; 
      else 
         digit =  str[i] - 48; 
      num=num*f_base+digit;
   }

Hope these help. And don't forget to remove your previous code.

ishtiaq ahmed wrote:I have tried this input as follows:
Code: Select all
2 2 0001
you should omit the leading zeros and as well as your repetance your output.

I think it is not a valid case. Because my code returns

Code: Select all

0001 base 2 = 1 base 2

So, you don't have to think about leading zeroes.

Posted: **Sun Mar 18, 2007 2:22 pm**

jan bhai,
I have updated my code again,gives correct output for all the inputs you have given. But still getting WA.

Code: Select all

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

long long in_base_10(long long f_base,char *str);
void in_require_base(long long base10,long long to_base);
char str[10000];
long long f_base;

int main()
{
	long long to_base,digit,base10,i,n;

	while( scanf("%lld %lld %s",&f_base,&to_base,str) != EOF)
	{
		int flag = 1;
		for(i = 0; str[i]; i++)
		{
			if(str[i] >= 'A' && str[i] <= 'F')
				digit = str[i] - 55;
			else if('1'>= str[i] && str[i] <= '9')
				digit = str[i] - 48;
			if(!(digit <= f_base - 1))
			{
				printf("%s is an illegal base %lld number\n",str,f_base);
				flag = 0;
				break;
			}
		}

		if(flag)
		{
			if(f_base != 10)
				base10 = in_base_10(f_base,str);
			else
				base10 = atol(str);
			in_require_base(base10,to_base);
		}
	}
	return 0;
}
long long in_base_10(long long f_base,char *str)
{
	long long i,digit;
	long long num = 0;
	for(i = 0; str[i]; i++)
	{
		if(str[i] > '9')
			digit = str[i] - 55;
		else
			digit =  str[i] - 48;
		num = num * f_base + digit;
	}
	return num;
}
void in_require_base(long long base10,long long to_base)
{
   long long  i = 0,j, mode,temp,len;
   char a[10000];
   while(base10)
   {
      mode = base10 % to_base;
      if(mode > 9)
	 a[i++] = mode + 55;
      else
	 a[i++] = mode + 48;
      base10 /= to_base;
   }
   a[i] = '\0';
   len = strlen(a);
   for(i = 0,j = len -1; i < j; i++,j--)
   {
      temp = a[i];      /* for string reverse*/
      a[i] = a[j];
      a[j] = temp;
   }
   if(!len)
	a[len] = '0';
   a[len + 1] ='\0';
   printf("%s base %lld = %s base %lld\n",str,f_base,a,to_base);

}

while(1)
{
printf("Thanks\n");
}

Posted: **Mon Mar 19, 2007 6:35 pm**

Replace the following unnecessary line

Code: Select all

else if('1'>= str[i] && str[i] <= '9')

with just

Code: Select all

else

Hope this works.

Posted: **Fri Apr 13, 2007 3:06 pm**

Dear Gurus,

Need your help in finding out the reason for WA.

Code: Select all

ERASED

i didnt take care about the power function for unsigned long long case.

It got AC after change.
Thanks a bunch!

Posted: **Fri Apr 13, 2007 3:35 pm**

Try

Code: Select all

16 10 1000000000
16 10 FEDCBA9876

Correct outputs:

Code: Select all

1000000000 base 16 = 68719476736 base 10
FEDCBA9876 base 16 = 1094624909430 base 10

Posted: **Fri Apr 13, 2007 4:01 pm**

Thanks to your test case mf.

Please provide some insights into testing my code with such test cases. how do you arrive at those test cases? so that going ahead i can test my codes rigorously before submitting...

Posted: **Sat Jun 30, 2007 3:58 am**

ishtiaq ahmed wrote:I have tried this input as follows:
Code: Select all
2 2 0001
you should omit the leading zeros and as well as your repetance your output.

I think it is not a valid case. Because my code returns

Code: Select all

0001 base 2 = 1 base 2

So, you don't have to think about leading zeroes.

I'm agree with you, both outputs are correct!

Code: Select all

0001 base 2 = 1 base 2
0001 base 2 = 0001 base 2

Posted: **Sat Jul 21, 2007 9:32 pm**

can 'unsigned long long' can hold the value of 9999999999(decimal)?

Posted: **Sun Jul 22, 2007 12:07 pm**

'long long' uses 64 bit. So, it can store the given value easily. The highest positive value in 'long long' is 9223372036854775807.

Hope it helps.

Posted: **Sun Jul 29, 2007 8:45 am**

I'd made all the test cases correct
but i still got WA why?
The following are my code

Code: Select all

#include<iostream>
#include<string>
using namespace std;
long long power(long a,long b);
int main()
{
    long long m,n;
    long long k=0;
    char str[200];
    long long rev[1000];
    long long sum=0;
    bool f=0;
    while(cin >> m >> n >> str)
    {
        for(int i=strlen(str)-1;i>=0;i--)
        {
                if(isdigit(str[i]))
                {
                   if(str[i]-'0'>m)
                   {
                      f = 1;
                      cout << str<<" is an illegal base "<<m<<" number"<<endl;
                         break;
                   }
                  sum += ((str[i]-'0')*power(m,strlen(str)-i-1));
                   
                }
                if(str[i]>='A'&&str[i]<='F')
                {
                   if(str[i]-'A'+10>m)
                   {
                      f = 1;
                      cout << str<<" is an illegal base "<<m<<" number"<<endl;
                         break;
                   }
                   sum += ((str[i]-'A'+10)*power(m,strlen(str)-i-1));
                  
                }     
        }
        if(sum==0)
        rev[k++]=0;
        while(sum)
        {
           rev[k]=sum%n;
           sum/=n;
           k++;
        }
        if(f==0)
        {
           cout << str<<" base "<< m << " = ";
           for(int j=k-1;j>=0;j--)
           {
              if(rev[j]==10)
                  cout <<'A';
              else if(rev[j]==11)
                  cout <<'B';
              else if(rev[j]==12)
                  cout <<'C';
              else if(rev[j]==13)
                  cout <<'D';
              else if(rev[j]==14)
                  cout <<'E';
              else if(rev[j]==15)
                  cout <<'F';
              else 
              cout << rev[j];
           }
           cout << " base "<<n;
           cout << endl;
        }
         for(int j=k-1;j>=0;j--)
              rev[j]=0;
        f=0;
        sum =0;
        k=0;
    }
    return 0;
}
long long power(long a,long b)
{
    long long result=1;
    for(int i=1;i<=b;i++)
    {
       result*=a;
    }
    return result;
}

Posted: **Thu Apr 10, 2008 7:12 pm**

Hey, Iam getting wrong answer even though my code pertains to all the suggestions made by different users for this problem such as leading zero & all possible test cases given on this page. Still some test case is possibly missing & Iam not getting it, please help me as soon as soon as possible.

[code]
#include<cstdio>
#include<cmath>
#include<cstdlib>
#include<cstring>
using namespace std;
int main()
{
long ibase,obase,inum,rem,count;
long long numten;
int i,j,flag=0,flag1=0;
long conv[6]={10,11,12,13,14,15};
char numst[6]={'A','B','C','D','E','F'};
char str[100],str1[100],str2[100],str3[100],str4[100],ostr[100],temp[100];
while((scanf("%ld %ld %s",&ibase,&obase,&str))!=EOF)
{
for(i=0;str[i]!='\0';i++)
{
if(((str[i]>='0' && str[i]<='9') && (int)(str[i]-'0')>=ibase) || (((str[i]>='A' && str[i]<='F') && conv[(int)(str[i]-'A')]>=ibase)))
{
flag1=1;
break;
}
}
if(flag1==1)
printf("%s is an illegal base %d number\n",str,ibase);
else
{
for(i=0;str[i]!='\0';i++)
{
if(str[i]>='A' && str[i]<='F')
{
flag=1;
break;
}
}
numten=0;
if(flag==0)
{
for(i=0;str[i]!='\0';i++)
str2[i]=str[i];
str2[i]='\0';
inum=(long)atoi(str);
count=0;
while(inum>0)
{
rem=inum%10;
inum=inum/10;
numten+=((long long)pow(ibase,(float)count))*rem;
count++;
}
}
else
{
for(i=0;str[i]!='\0';i++)
str1[i]=str[i];
str1[i]='\0';
for(j=i-1;j>=0;j--)
temp[i-1-j]=str[j];
temp[i]='\0';
for(j=0;j<=i;j++)
str[j]=temp[j];
for(i=0;str[i]!='\0';i++)
{
if(str[i]>='0' && str[i]<='9')
numten=numten+(long long)(str[i]-'0')*(long)pow(ibase,(float)i);
else if(str[i]>='A' && str[i]<='F')
numten=numten+(long long)pow(ibase,(float)i)*(long)conv[(int)(str[i]-'A')];
}
}
count=0;
while(numten!=0)
{
rem=numten%obase;
numten=numten/obase;
if(rem<10)
ostr[count++]=rem+'0';
else if(rem>=10 && rem<=15)
ostr[count++]=numst[rem-10];
}
ostr[count]='\0';
for(i=0;ostr[i]!='\0';i++)
;
for(j=i-1;j>=0;j--)
temp[i-1-j]=ostr[j];
temp[i]='\0';
for(j=0;j<=i;j++)
ostr[j]=temp[j];
int l=strlen(ostr);
if(l==0)
printf("0 base %d = 0 base %d\n",ibase,obase);
else
{
l=7-l;
if(flag==0)
{
for(i=0;str2[i]=='0';i++)
;
for(j=i;str2[j]!='\0';j++)
str4[j-i]=str2[j];
str4[j-i]='\0';
printf("%s base %d = %s base %d\n",str4,ibase,ostr,obase);
}
else
{
for(i=0;str1[i]=='0';i++)
;
for(j=i;str1[j]!='\0';j++)
str3[j-i]=str1[j];
str3[j-i]='\0';
printf("%s base %d = %s base %d\n",str3,ibase,ostr,obase);
}
}
}
flag1=0;
flag=0;
}
return(0);
}
[/code]

Posted: **Fri Apr 11, 2008 12:45 am**

Try the cases.

Input:

Code: Select all

10 8 8650286024
15 13 59A566
5 10 3441011134
7 10 3226143411
8 9 3006355015

Output:

Code: Select all

8650286024 base 10 = 100346161710 base 8
59A566 base 15 = B71686 base 13
3441011134 base 5 = 7750794 base 10
3226143411 base 7 = 134971047 base 10
3006355015 base 8 = 1034758324 base 9

Hope these help.

OJ Board

355 - The Bases Are Loaded

dear Jainal

getting WA in 355

Thanks mf

leading zeros doesn't matter

WA

Help Required (Getting Wrong Answer)

Re: 355 - The Bases Are Loaded