10925 - Krakovia

[Roby]

Yes, I know this just "BigInt arithmetic" problem, but I've end-minded about how to change it... This's actually my first approach on BigInt problem and it's so made me stress...

[Krzysztof Duleba]

It's just a problem, nothing to be stressed about.

Read the code carefully again and again. If you're fed up with it, write a test case generator and get some big tests. You'll have to verify the answers, so write a converter from input data to bc input format and use it as an oracle.

[Roby]

OK, I've found my bug and it's in my divide function... any suggestion how to change it? or just the algorithm is ok, I just confused and have no idea how to change it... I implement primary school division algorithm... any tutorial or help please ...

[Timo]

Don't be stress

you can use my divide function

Code: Select all

#include <stdio.h>


int Divide(char hasil[],int F,char out[])
{
	int i, j, x;

	x=0; i=0;
	while(hasil[i])
	{
		x *= 10;
		x += hasil[i++]-'0';
		if(x>=F) break;
	}

	j=0;
	do
	{
		if(x>=F)
		{
			out[j++] = (x/F)+'0';
			x = x%F;
		}
		else out[j++]='0';
		if(hasil[i]=='\0') break;
		x *= 10;
		x += hasil[i++]-'0';
	}
	while(1);

	out[j]='\0';
        return x;
}

int main()
{
	char result[10];
	int remainder;
	remainder = Divide("123",7,result);
	printf("result = %s\n",result);
	printf("remainder = %d\n",remainder);
}

[Roby]

Thanx Timo... I'll study that...

[Martin Macko]

Input:

Code: Select all

1 16
17432479801732498109834891047810
1 15
17432479801732498109834891047810

This input is not correct as the numbers should be at most 10^20.

[abdullah<cse du>]

Hi all,

I have checked my code with all of the sample input in the board. And get correct ans. But still the program gives wrong ans in UVA. Please help me to locate the bugs in my code.

Code: Select all

/*code has been removed
  after accepted*/

Please help me
Thanks

ABDULLAH

[Jan]

Initialization problem. Initialize upto 'l_max+1'. Hope it helps.

[abdullah<cse du>]

Jan vai,

What do you mean by 'Initialization problem'. I can't understand. Please describe it.

Thanks

ABDULLAH.

[Jan]

1. Use l_max+1 to initialize (or to call other functions)
2. Check the following part

Code: Select all

      while(carry)
      {
         mod=carry%10;
         add[i]=mod+'0';
         carry/=10;
         i++; // You missed this line
      }

3. Check the output format and change your code.

Hope these help.

[abdullah<cse du>]

Thanks Jan vai, I got accepted.

[Jan]

Remove your code.

[rezaeeEE]

i get wa.
can any body find my buge?
i cant find it.

Code: Select all

#include <iostream>
#include <string>

using namespace std;

string sum(string s1, string s2)
{
	string s3;
	int l1 = s1.length();
	int l2 = s2.length();
	int ptr1 = l1 - 1, ptr2 = l2 - 1, q = 0;
	while( ptr1 >= 0 || ptr2 >= 0 )
	{
		if(ptr1 >= 0)
			q += s1[ptr1--] - '0';
		if(ptr2 >= 0)
			q += s2[ptr2--] - '0';
		s3 = (char)( q % 10 + '0') + s3;
		q /= 10;
	}
	while( q )
	{
		s3 = (char)( q % 10 + '0') + s3;
		q /= 10;
	}
	return s3;
}

string div(string s, int n)
{
	string s2;
	int q = 0;
	for(int i = 0;i < s.length();i++)
	{
		q = q * 10 + s[i] - '0';
		s2 += (char)( q / n + '0');
		q = q % n;
	}
	int ptr = 0;
	while(ptr < s2.length() - 1 && s2[ptr] == '0')
		ptr++;
	s2 = s2.substr(ptr, s2.length() - ptr);
	return s2;
}

int main()
{
	int n, f, test = 1;
	while(cin >> n >> f, n || f)
	{
		if( test > 1)
			cout << endl;
		string s1 = "0", s2;
		for(int i = 0;i < n;i++)
		{
			cin >> s2;
			s1 = sum(s1, s2);
		}
		string dv = div(s1, f);
		cout << "Bill #"<<test++<<
				" costs "<<s1<<": each friend should pay "
				<<dv<<endl;
	}
	return 0;
}

thanks

[Jan]

Read the description again.

After each test case, you should print a blank line.

You are printing a blank line between cases. Why?

[turcse143]

This is my sample input-output,i got WA.
ples help,giving some concept or sample input-output
input:
3 3
5400000000
5400000000
5400000000
3 2
5400000000
5400000000
9000000001
0 0
output:
Bill #1 costs 16200000000: each friend should pay 5400000000

Bill #2 costs 19800000001: each friend should pay 9900000000

Press any key to continue

i don't know whats problem?