OJ Board

Can anyone tell me why i got runtime error?
I run in my computer is ok

#include <stdio.h>
#include <stdlib.h>

int main()
{
int i=2,n,ans[100000]={0},rans[1000][2600]={0,0},x=1,time,num,j,len[100000]={0};
len[0]=1;
ans[0]=1;
while (i<=1000)
{
x=product(ans,i,x);

for(j=0;j<=x;j++)
{
rans ...

#include <stdio.h>
int main()
{
float x[10][2],y[10][2];
int i=0;
char r;

while(i<10)
{
scanf("%c",&r);
if(r=='*')
break;
else if(r=='r')
{
scanf("%f %f %f %f",&x[i][0],&y[i][0],&x[i][1],&y[i][1]);
i++;


}


}

double x1,y1;
int cout=1,judge=0;
int j=0;
while(scanf("%lf %lf",&x1,&y1 ...

Can anyone tell me why I awalays get Time limit exceeded
Thanks
#include <stdio.h>
int main()
{
int prime[200]={1},n,c,i,j,num=1,x;
while(scanf("%d %d",&n,&c)!=EOF)
{

for(i=2;i<=n;i++)
{
for(j=2;j<=i;j++)
if(i%j==0 && j!=i)
{
break;
}
else if(i%j==0 && j==i)
{
prime[num]=i;
num ...