i can't understand this code of c pattern design

I can't understand this code pattern solution

#include <stdio.h>

int main()
{

    int n;
    scanf("%d", &n);
    int len = n*2 - 1;
    for(int i=0;i<len;i++){
        for(int j=0;j<len;j++){
            int min = i < j ? i : j;
            min = min < len-i ? min : len-i-1;
            min = min < len-j-1 ? min : len-j-1;
            printf("%d ", n-min);
        }
        printf("\n");
    }
    return 0;
}

the code is perfect but I'm not able to understand this code,and I want to understand this code in easy language