大佬帮忙看看吧

这是代码：

#include <bits/stdc++.h>
using namespace std;

int n,a,b;
bool c[1005];
bool f = true;

int main ()
{
	cin >> n >> a;
	
	for ( int i = 1 ; i < n ; ++ i )
	{
		cin >> b;
		c[abs(a-b)] = true;
		a = b;
	}
	
	for ( int i = 1 ; i < n ; ++ i )
		if ( c[i] == false )
		   f = false;
	
	if ( f )
	   cout << "Jolly" << endl;
	else
	   cout << "Not jolly" << endl;
	
	return 0;
	
}

这是输入： 300 28213468 28210970 28208956 28209258 28208930 28208948 28212846 28210132 28209234 28209933 28211949 28208815 28211108 28209888 28209400 28210768 28210825 28212553 28214054 28210737 28210854 28210741 28208724 28212891 28210136 28212365 28210113 28213648 28212128 28210112 28211875 28208802 28212163 28210676 28213795 28208596 28214028 28210459 28209483 28209864 28209598 28209942 28210777 28212688 28210356 28208840 28210740 28210624 28208643 28210949 28208850 28208720 28213107 28210435 28210868 28212430 28211070 28209660 28210717 28209726 28212592 28208458 28210798 28214026 28210253 28214090 28210255 28210832 28212034 28208710 28213856 28210922 28212754 28212113 28212801 28213743 28208841 28213665 28209694 28210904 28209066 28213602 28211601 28213170 28212116 28210159 28209817 28210000 28213453 28211617 28214242 28209636 28212358 28213794 28214201 28208606 28209296 28210116 28209944 28212650 28212812 28211372 28214362 28210783 28211739 28214012 28212120 28210096 28212453 28214215 28212314 28213581 28209123 28210145 28211539 28209541 28209737 28209838 28208877 28209181 28212921 28212369 28208697 28209554 28208856 28209396 28210451 28212531 28210795 28211110 28213387 28209059 28212766 28209034 28208725 28210693 28212315 28213484 28208770 28212057 28212965 28209008 28208995 28213997 28214103 28211132 28212946 28209857 28208721 28211050 28208896 28210945 28212937 28210715 28208635 28212553 28213312 28213144 28209528 28210530 28209382 28212212 28210133 28211018 28210420 28211074 28213141 28210825 28210092 28213868 28212371 28211519 28214222 28210601 28210177 28209111 28213540 28211012 28210835 28210182 28209439 28210216 28210996 28211298 28209037 28209961 28211402 28211930 28210006 28211652 28209140 28209428 28210146 28208664 28212609 28212605 28210036 28211341 28208971 28213730 28208380 28213870 28210978 28210878 28212397 28210480 28209838 28213659 28208878 28210145 28211113 28210608 28210722 28210814 28212076 28211871 28212864 28210764 28211499 28209791 28209725 28212845 28212060 28213657 28210968 28210310 28214301 28213557 28210064 28211806 28211168 28210354 28208885 28210251 28210496 28208874 28209456 28211064 28210307 28210978 28211171 28211269 28210754 28208782 28210907 28208765 28209808 28209247 28210434 28210488 28210702 28210261 28213437 28213095 28210574 28209492 28211698 28210312 28210147 28212211 28208685 28209857 28209464 28213366 28213898 28210469 28213180 28211018 28208849 28210792 28212006 28209896 28210226 28210528 28210122 28210273 28210428 28210859 28210647 28210389 28210896 28211119 28208874 28208973 28211210 28210813 28210818 28212666 28213353 28213367 28213964 28211769 28210370 28210181 28208757 28209068 28213446 28210122 28209927 28210508

程序在输出“Not jolly”后会卡好久才return 0

救救孩子吧！！！