write per 4kb

#include <stdio.h>
#include <stdlib.h>

int main() {
        int *a = malloc(409600000);
        int j = 0;
        for (i = 0; i < 100000; i++) {
                a[j] = 1;
                j += 1024;
        }

        printf("Pages allocated.\n");
        getchar();
        return 0;
}