Need Advice and help from C programmer

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C

I'm writing a C program that will print the following sequence As an Example If n=5
5
4 1
3 2
3 1 1
2 2 1
2 1 1 1
1 1 1 1 1

i have write a code and one of my friend make some changes to it and now it working properly. But i couldn't understand what he has done. the code is written here below

#include <stdio.h>

int Min(int Number1, int Number2)
{
	if(Number1 <= Number2)
		return Number1;
	else
		return Number2;
}

void Partition(int Number, int Lim, const char* Str)
{    
    int Count = 0; 
    char Out[50];   
    if (Number > 0)
    {
        for(Count = Min(Number, Lim);Count > 0;Count-- )
        {
            sprintf(Out, "%s %d", Str, Count);
            Partition(Number - Count, Count, Out);
        }
    }
    else
        printf("%s\n", Str);
}

int main()
{
    int Number = 0;
    
    
    char Str[50];
        
    printf("Enter a number: ");
    scanf("%d", &Number);
    
    if (Number < 1)
    {
        printf("Number is Negative.\n");
        return -1;    
    }
    
    sprintf(Str, "%d = ", Number);
    Partition(Number, Number, Str);
    
    return 0;
}

if you need any psedocode help here it is: but i'm not sure wheather this is correct or not. Since i'm beginner for c plz help.

Procedure Min (Number1, Number2)
1.If Number1<=Number2
2. then return Number1
3. else return Number2

Procedure Partition (Number, Lim, Str)
1. count 0
2. if Number > 0
3. then for count Min (Number, Lim) down to 1
4. print (Str, count)
5. Partition(Number-count,count,Out)
6. else
7. then print(Str)

Can't we do this using <math.h> in order to skip that "Min Function"