OJ Board

i am embarassed to get a WA on such an easy question but i don't know why . please check following :

#include <iostream>
#include <cmath>
using namespace std;

int main(int argc, char *argv[]){
long long int a,b;
while(cin >> a >> b){
cout << abs(b- a) << endl;
}
return 0;
}

phew, thanx, accepted at last !
AC !

i haven't taken care of that, but that is really a stupid input which i am not expecting at all ....

but if that is the case, what we need to do ?

Here is my code, can you help me in figuring out why this is a Runtime error !

#include <iostream>
#include <cstdlib>
#include <cstdio>
#include <cstring>
using namespace std;

int *ar,*arr;

int find(unsigned int a,unsigned int u,unsigned int uu){
int n=1;
while(a!=1){
if(a<=uu && a>=u && ar[a ...