Sergeeeeey

#include <stdio.h>
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <stddef.h>
#include <time.h>


int randomazer (int min, int max){
    int random;
    random = rand();
    random = ((float)random / RAND_MAX)*(max-min)+min;
    return(random);
}

void change (int *A, int i, int size){
    int tmp;
    tmp = A[i];
    A[i] = A[size-1];
    A[size-1] = tmp;
}

void output_mass(int *A, int size){
    int i;
    for (i=0; i<size; i++){
        printf ("%d ", A[i]);
    }
    printf ("\n");
}

int main(void) {
    srand(time(NULL));
    int min, max, size, i;
    scanf ("%d", &size);
    int *A; //ukazatel na massiv
    min = 5;
    max = 20;
    A = (int*)malloc(size * sizeof(int));

    for (i=0; i<size; i++){
        A[i] = randomazer (min, max);
    }
    output_mass (A, size);
    scanf ("%d", &i);
    change (A, i, size);
    output_mass (A, size);

    return 0;
}