Brush questions - Luogu -p1059 clear random number

P1059 A clear random number -C Language

1、 subject

2、 The problem solving process

result ：

// Luogu  P1059  A clear random number 
#include <stdio.h>
#define NUM 100 // The maximum number of initial random numbers 
int main()
{
    
	int n;// Represents the number of initial random numbers  N<=100
	int m=0;// Represents the number of different random numbers -1
	int random[NUM];// Initial random number 
	int random_new[NUM];// Different random numbers 
	int i,j;
	int temp;// Temporary value for sorting 
	int k;// The number of different random numbers 
	scanf("%d", &n);
	scanf("%d", &random[0]);
	random_new[m] = random[0];
	for (i = 1; i < n; i++) {
    
		scanf("%d", &random[i]);
		for (j = 0; j < i; j++) {
    
			if (random[i] == random[j]) {
    
				break;
			}
		}
		if (j == i) {
    
			m++;
			random_new[m] = random[i];
		}
	}
	k = m + 1;// Easy to understand 
	// Bubble sort   From small to large 
	for (i = 0; i < k; i++) {
    // Right k The number goes on k-1 Round bubble sorting 
		for (j = 0; j < k-i-1; j++) {
    
			if (random_new[j] > random_new[j+1]) {
    // In exchange for 
				temp = random_new[j];
				random_new[j] = random_new[j+1];
				random_new[j+1] = temp;
			}
		}
	}
	printf("%d\n", m + 1);
	for (i = 0; i < m + 1; i++) {
    
		printf("%d ", random_new[i]);
	}

	return 0;
}