Minimum number of C language

Keyboard entry N（N ≤ 20） individual 0-9 Numbers , You can arrange these numbers in any order , But all must be used . The goal is to make the final number as small as possible （ Be careful 0 Can't be the first ）.
for example ：
Given two 0, Two 1, Three 5, One 8, The smallest number we get is 10015558.

Programming requirements ：
1、N The value of ：N ≤ 20;
2、 The entered number contains at least one non-zero number ;
3、 Please use array to realize ;
4、 Please output strictly according to the output effect ;（ Affect the performance evaluation ）
5、 When submitting the code of the task, it is necessary to ensure that it conforms to the industry code specification , You need to indent and wrap as necessary .（ Affect the performance evaluation ）

Running effect 1：
Please enter the number of numbers N：6
Please enter 6 A digital ：0 1 7 2 0 3
The minimum number of components is ：100237
Please press any key to continue . . .

Running effect 2：
Please enter the number of numbers N：8
Please enter 8 A digital ：0 1 5 5 8 1 0 5
The minimum number of components is ：10015558
Please press any key to continue . . .

#include <stdio.h>

int main(void)
{
     
    int N ,arr[20] ,i ,j ,temp;
    printf(" Please enter the number of numbers N：");
    scanf("%d" ,&N);
    printf(" Please enter %d A digital ：", N);
    for (i = 0; i < N; i++)
        scanf("%d" ,&arr[i]);
    for (i = 0; i < N - 1; i++)
        for(j = 0; j < N - i -1 ; ++j)
        {
    
            if(arr[j] > arr[j+1])
            {
    
                temp = arr[j];
                arr[j] = arr[j+1];
                arr[j+1] = temp;
            }
        }
    for (i = 0; i < N; i++)
        if(arr[i] != 0)
        {
    
            temp = arr[i];
            arr[i] = arr[0];
            arr[0] = temp;
            break;
        }
    printf(" The minimum number of components is ：" );
    for (i = 0; i < N; i++)
        printf("%d" ,arr[i]);
    printf("\n");

    return 0;
}

#include <stdio.h>

int main(void)
{
    
    int a[21];
	int n,i,j,m;
	printf(" Please enter the number of numbers N: ");
	scanf("%d",&n);
	printf(" Please enter %d A digital : ",n);
	for(i=0;i<n;++i){
    
		scanf("%d",&a[i]);
	} 
	for(i=0;i<n-1;++i){
    
		for(j=0;j<n-1;++j){
    
			if(a[j]>a[j+1]){
    
				m=a[j];
				a[j]=a[j+1];
				a[j+1]=m;
			}
		}
	}
	for(i=0;a[i]==0;++i);
	m=a[i];
	a[i]=a[0];
	a[0]=m;
	printf(" The smallest number of components is : ");
	for(i=0;i<n;++i){
    
		printf("%d",a[i]);
	}
	printf("\n");
    return 0;
}