jotaki

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <ctype.h>
#include <termios.h>

int main(void)
{
        char buf[BUFSIZ];

jotaki

#include <stdio.h>

int main(int argc, char *argv[])
{
  int i;
  
  for(i=0;i<argc;i++) {
    printf("Argument %d: %s\n", i, argv[i]);
  }
}

jotaki

given that:
f(2n) = n/2
f(2n+1) = 3n+1

we can see that the pattern translates to a pattern of 4x+(0,1,2,3) such that:
(4x+0)/2 = 2n    (potentially 4x+2 or 4x+0)
(4x+1)   = 2n+1
(4x+2)/2 = 2n+1
(4x+3)   = 2n+1

jotaki

diff -pruN a/include/errno.h b/include/errno.h
--- include/errno.h	2012-05-15 07:20:09.000000000 +0000
+++ include/errno.h	2014-08-28 10:08:31.046932387 +0000
@@ -87,7 +87,7 @@ extern __thread int errno attribute_tls_
    might need this definition sometimes even if this file was included
    before.  */
 #if defined __USE_GNU || defined __need_error_t
-# ifndef __error_t_defined
+# if !defined __error_t_defined && !defined error_t
 typedef int error_t;

jotaki

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

#define LIST_SIZE       1024 * 1024 * 25

/* min by compare */
inline int mbc(int a, int b) { return a > b? b: a; }

jotaki

 struct node_s * add_node(struct node_s ** tree, struct node_s * leaf)
{
        if(*tree == NULL)
                *tree = leaf;
        else if((*tree)->key > leaf->key) {
                leaf->right = *tree;
                *tree = leaf;
        }
        else if((*tree)->key < leaf->key) {
                leaf->left = *tree;

jotaki

	.file	"mynewx.c"
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"numbers.txt"
.LC1:
	.string	"%u\n"
.LC2:
	.string	"%d in %ld ms\n"
	.section	.text.startup,"ax",@progbits
	.p2align 4,,15

jotaki

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

void swap(int *p, int i, int j)
{
        int t = p[i];
        p[i] = p[j];
        p[j] = t;
}

jotaki

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <time.h>
#include <fcntl.h>
#include <sys/stat.h>

#define PATH "numbers.txt"
#define CHUNK_SIZE 4096

jotaki

#include <stdio.h>
#include <time.h>
#include <omp.h>

int main()
{
        unsigned long long l = 0, a = 0;
        clock_t start, stop;

        start = clock();