#include <stdio.h>

int main(void)
{
    unsigned long long availmem;
    FILE *fp;
    fp = fopen("/proc/meminfo","r");
    fscanf(fp,"%*s %*s %*s %*s %*s %*s %*s %llu", &availmem);
    fclose(fp);
    printf("%llu MB free\n",availmem/1024);
    return(0);
}