Wuhan University of Science and Technology acm:1008: Random number of the Ming

Problem Description

Obviously want to ask some students in school to do a questionnaire survey, in order to the objectivity of the experiment, he first used a computer to generate N 1 to 1000 random integer (n≤100), for the repeated numbers, only one, the rest of the same number is removed, the different numbers correspond to different student's number. Then the numbers from small to large sorting, in line with the order to find students to do the investigation. Please help clearly to complete the "go to Heavy" and "sort" work.

Input

The input has 2 rows, and the 1th behavior is 1 positive integers, indicating the number of random numbers generated:

N

The 2nd line has n spaces separated by a positive integer, which is the resulting random number.

Output

The output is also 2 lines, and the 1th behavior is 1 positive integer m, which represents the number of different random numbers. The 2nd behavior is a positive integer separated by a space, which is a different random number from small to large sequence.

Sample Input

1020 40 32 67 40 20 89 300 400 15

Sample Output

815 20 32 40 67 89 300 400

HINT

1#include <iostream>2 using namespacestd;3 4 intMain ()5 {6     7     intnum,i;8      while(Cin >>num)9     {Ten         intentry[ +] = {0}; One         intRandomnum =0; A          for(i =0; i < num; i++) -         {    -CIN >>Randomnum; theEntry[randomnum] =1; -         } -          -         intCount =0; +          for(i =0; I < +; i++) -         { +             if(Entry[i]! =0) A             { atcount++;//record the number of non-0 in the array -             } -         } -num =count; -cout << Num <<Endl; -Count =0; in          for(inti =0; I < +; i++) -         { to             if(Entry[i]! =0) +             { -cout <<i; thecount++; *                 if(Count! =num) $                 {Panax Notoginsengcout <<" "; -                 } the                 Else +                 { Acout <<Endl; the                 } +             } -         } $     } $     return 0; -}

Wuhan University of Science and Technology acm:1008: Random number of the Ming