#include "stdlib.h"
#include "stdio.h"
#include "string.h"
#include "sys/types.h"
#include "sys/sysinfo.h"

int main()
{
    char quit = '1';
    FILE* file;
    unsigned long physMemUsed = 0;
    char lose[200];
    char mem_str[200];



    while (quit != '0') {

        file = fopen("/proc/meminfo", "r");
        fgets(lose, 200, file);
        fgets(lose, 200, file);
        fscanf(file, "%s", mem_str);
        fclose(file);

        int i = 15;
        while (mem_str[i] != 'k') {

            if (mem_str[i] <= '9'|| mem_str[i] >= '0' ){
                physMemUsed = physMemUsed * 10 + atoi(&mem_str[i]);
            }
            ++i;
        }


        physMemUsed = physMemUsed / 1024;

        printf("%lu", physMemUsed);
        printf("\n");
        quit = getchar();

    }
}