Q. can anyone please tell why this program is showing runtime error ?
#include<stdio.h>
#define NMAX 1000000
int main()
{
int t,n,p,s,count,i,l,r,k;
char num[NMAX];
scanf("%d",&t);
while(t--)
{
k=0;
count=0;
scanf("%d",&n);
if(n>=1)
{
scanf("%d%d",&l,&r);
p=l;
s=r;
n=n-1;
}
for(i=1;i<=n;i++)
{
scanf("%d%d",&l,&r);
while(p!=l || s!=r)
{
if(p+1!=s && p!=l && l>p)
{
p++;
num[k++]='L';
num[k++]='+';
}
else if(p-1!=s && p!=l && l<p)
{
p--;
num[k++]='L';
num[k++]='-';
}
else if(r>s)
{
s++;
num[k++]='R';
num[k++]='+';
}
else
{
s--;
num[k++]='R';
num[k++]='-';
}
count++;
}
}
num[k]='\0';
printf("%d\n",count);
printf("%s\n",num);
}
return 0;
}