How to rewrite code (C) to make it run faster?

Question

C++ / C#

#include <stdio.h>
#include <math.h>

int main(){
    int i,j,min,n;
    int size = 0;
        scanf("%i", &size);
        scanf("%i", &n);
    int N[size];
    for (i = 0; i <=(size-1); i++){
        scanf("%i", &N[i]);
    }

    for (i = 0; i <=(size-n); i++){
                min=N[i];
        for (j = 0; j <=(n-1); j++){
            if(N[i+j]<min){min=N[i+j];}
        }
        printf("%d\n",min);
}
}

Answer 1

https://e-maxx.ru/algo/stacks_for_minima