#include<string.h>
#include<stdio.h>
#include<time.h>
#include<math.h>
#include <pthread.h>
#include <unistd.h>
#include <stdlib.h>

/**
 * @author cristian.chilipirea
 *
 */

int N = 1024*1024*100;
int P;
int a;

void* threadFunction(void *var)
{
	int thread_id = *(int*)var;

	int start = thread_id * ceil((double)N/P);
	int end;
	if( N > (thread_id + 1) * ceil((double)N/P))
		end = (thread_id + 1) * ceil((double)N/P);
	else
		end = N;

	int c;
	for (int i = start; i < end; ++i)
		c = sqrt(a);
}

int main(int argc, char * argv[]) {
	P = atoi(argv[1]);
	clock_t begin = clock();

	{
		pthread_t tid[P];
		int thread_id[P];

		for(int i = 0; i < P; ++i)
			thread_id[i] = i;

		for(int i = 0; i < P; i++)
			pthread_create(&(tid[i]), NULL, threadFunction, &(thread_id[i]));

		for(int i = 0; i < P; i++)
			pthread_join(tid[i], NULL);
	}

	clock_t end = clock();
	double time_spent = (double)(end - begin) / CLOCKS_PER_SEC;

	printf("%f\n",time_spent);
	return 0;
}