OJ Board

can anyone help me telling why im getting wrong answer?????

# include <stdio.h>

int main()
{
long long n,i,j,m,k,l,number;

for(scanf("%lld %lld",&i,&j);i || j;scanf("%lld %lld",&i,&j))
{

m=0;
k=i;
for(k;k<=j;k++)
{
l=k;
for(n=1;;n++)
{

if(l%2!=0)
l=3*l+1;
else
l=l/2;
if(l==1 ...

if d=0 then how it is possible to determine two different paths?????

now i get it......the prob is in sqrt(n)*sqrt(n)......

ya thanx......i got it.....

why WA??
i tried many test cases and all came out correctly????then why WA???

here is my code.....

# include <math.h>
# include <stdio.h>
int main()
{
long long a,s,n,d;
while(scanf("%lld",&a)==1)
{
scanf("%lld",&s);
d=2*a-1;
d=d*d+8*s;
n=(-(2*a-1)+sqrt(d))/2;
if(d==sqrt(d)*sqrt(d ...

why do i get a runtime error in this code...

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

int main()
{
char a[30];
int i,j;

while(gets(a))
{
j=strlen(a);
for(i=0;i<j;i++)
{
if(a >64 && a <=67)
a ='2';
else if(a >67 && a <=70)
a ='3';
else if(a >70 && a <=73)
a ='4';
else if(a >73 && a[i ...