#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <math.h>
#include <unistd.h>
#include <string.h>
#include <sys/time.h>
#include <sys/types.h>

float exec_cmd(char *cmd)
{
        FILE* fp;
        char* command;
        char* line;
        char* result;

        line = malloc(200 * sizeof(char));
        command = malloc(200 * sizeof(char));
        strcpy(command, cmd);

        fp = popen(command,"r");
        while((fgets(line, 60, fp)))
        {
                result = line;
        }
        return atof(result);
}

long long current_timestamp() {
    struct timeval te; 
    gettimeofday(&te, NULL); // get current time
    long long milliseconds = te.tv_sec*1000LL + te.tv_usec/1000; // calculate milliseconds
    // printf("milliseconds: %lld\n", milliseconds);
    return milliseconds;
}

float main()
{
        float freq = exec_cmd("cat /proc/cpuinfo | grep \"cpu MHz\" | awk '{s+=$4} END {printf \"%0.3f\", s}'");
        int cpus = exec_cmd("cat /proc/cpuinfo | grep processor | wc -l");
	float core = exec_cmd("grep 'cpu ' /proc/stat | awk '{usage=($2+$4)*100/($2+$4+$5)} END {print usage \"\"}'");
        int ram = exec_cmd("free -mt | grep Total: | awk '{s+=$3} END {printf \"%d\", s}'");
	int pid = getpid();

        printf("\nRamdy 0.1\n");
        printf("\n-------------------------\n");
        printf("\nTimestamp: %lld \n", current_timestamp());
        printf("\nPid: %d \n", pid);
        printf("\nFreq: %.6f \n", freq);
        printf("\nCpus: %d \n", cpus);
        printf("\nRam: %d \n", ram);
        printf("\nCore: %.6f \n", core);
        printf("\n----------\n");

        int date = (7 * (getpid() * current_timestamp()) + 3) % 1000;
        int cpur = (7 * (int)(freq * ram) + 3 ) % 1000;

        float result = (100 * (date * cpur)) / 998001;

        printf("\nDate: %d\n", date);
        printf("\nCpu: %d\n", cpur);
        printf("\nResult: %.6f\n", result);

        return result;
}