OJ Board

here is my code
[c]int Path[20][20];
printpath(int i,int j)
{
if(i!=j) printpath(i,Path [j]);
printf("%d ",j+1);
}
main()
{
double conv[20][20];
int n,i,j,k,arbitrage;
while(scanf("%d",&n)==1){
arbitrage=0;
for(i=0;i<n;i++)
for(j=0;j<n;j++){
if(i==j) conv [j]=1;
else scanf("%lf",&conv [j ...

I have so solved some prob. but I allways got P.E.Why???
Can some body tell me what will make P.E.
thanx.

I have so solved some prob. but I allways got P.E.Why???
Can some body tell me what will make P.E.
thanx.