2575.cpp

这些是我到目前在PKU上做出的题目

#include <iostream.h>
int abss(int a)
{if (a>=0) return(a); else return(-a);}
int main()
{int a[3001],n,i,k,l;
 bool b[3000];
 while (cin>>n)
 {for (i=1;i<=n;i++)
   cin>>a[i];
  k=0;
  for (i=1;i<=n-1;i++) b[i]=1;
  for (i=1;i<=n-1;i++)
  {l=abss(a[i]-a[i+1]);
   if (l>n-1) break;
   if (b[l]) k=k+1;
   b[l]=0;}
  if (k==n-1) cout<<"Jolly\n"; else cout<<"Not jolly\n";}
return 0;
}