713 - Adding Reversed Numbers

[mentalist_mbstu]

i don't understand could u tell in details

[mentalist_mbstu]

On my machine your code doesn't match the sample input. It is printing some extra characters on the third line.

i don't understand could u tell in details

[brianfry713]

Input:

Code: Select all

2
999999 999999
1 999999

AC output:

Code: Select all

8999991
1

See http://ideone.com/gnCDWB

[mentalist_mbstu]

Input:

Code: Select all

2
999999 999999
1 999999

AC output:

Code: Select all

8999991
1

See http://ideone.com/gnCDWB

bt when i input
2
1 999999
999999 999999
output
1
8999991
bt when i input
2
999999 999999
1 999999
output
8999991
99991
i could not catch it

[brianfry713]

You're reading past the end of a string.

[mentalist_mbstu]

i don't understand what u want to say

You're reading past the end of a string.

[brianfry713]

A string is terminated with a null character. Your code continues to read beyond that into uninitialized data.

[mentalist_mbstu]

i am new in string..so would u like to specify which line i make mistake?

A string is terminated with a null character. Your code continues to read beyond that into uninitialized data.

[MNT.95]

My code is AC in SPOJ and POJ, but in UVA it is WA??
Why is that heppens to the same code ??

[MNT.95]

My code

Code: Select all

#include<stdio.h>
using namespace std;
 int main()
 {

	 int t;
	 scanf("%d",&t);
	 while(t--)
	 {
		 long long x,rev_x=0,y,rev_y=0,sum,rev_sum=0;
		 scanf("%d %d",&x,&y);
		 while(x>0)
		 {
			 rev_x *= 10;
			 rev_x += x%10;
			 x=x/10;
		 }
		 while(y>0)
		 {
			 rev_y *= 10;
			 rev_y += y%10;
			 y=y/10;
		 }
		 sum=rev_x+rev_y;
		 while(sum>0)
		 {
			 rev_sum *= 10;
			 rev_sum += sum%10;
			 sum=sum/10;
		 }
		 printf("%d\n",rev_sum);
	 }
return 0;
}

[brianfry713]

use scanf("%lld") for a long long

[uDebug]

brianfry713,

Thanks very much for the host of test cases.

Update: Deleted own test cases per post by brianfry713.

[uDebug]

Replying to follow the thread.

[try_tired]

Why I got wrong ans: here.......... pls help.

import java.io.*;
import java.util.*;
import java.math.*;
public class Main {

public static void main(String[] args)throws IOException {
try{

String s,ss,sum1;
StringBuffer s1,s11,sum2;
BigInteger sum;
long l1,l2,lf;
int n,i;

Scanner sc = new Scanner(System.in);
n = sc.nextInt();
for(i = 1;i <= n;i++)
{
s = sc.next();
ss = sc.next();

s1 = new StringBuffer(s);
s1 = s1.reverse();
s = s1.toString();
l1 = Long.valueOf(s);

s11 = new StringBuffer(ss);
s11 = s11.reverse();
ss = s11.toString();
l2 = Long.valueOf(ss);

sum = BigInteger.valueOf(l1+l2);
sum1 = sum.toString();
sum2 = new StringBuffer(sum1);

sum2 = sum2.reverse();
sum1 = sum2.toString();
lf = Long.valueOf(sum1);
System.out.println(lf);
}

}catch(Exception e){
System.out.print("Error");
}

}

}

[uDebug]

Why I got wrong ans: here.......... pls help.

First, consider using the code tags to share your code to make it more readable. Think about it: Would you spend even a moment looking at what you posted above as an objective reviewer?

Next, try searching the forums more extensively before you post. Here's a much more detailed thread with test cases and discussion.

http://acm.uva.es/board/viewtopic.php?f ... &hilit=713

Test your code with test cases given there.