GTK+ tic-tac-toe(井字棋)

语言:C99
图标是随手涂鸦的
界面部分抄袭 http://sourceforge.net/projects/tictactoegtk/(作者:Obada Denis(obadadenis@gmail.com),javajox(javajox@users.sourceforge.net))
算法是 min-max search
版本控制系统采用 8pm 推荐的 Mercurial
项目首页:http://code.google.com/p/rayup/ #里面还有些其他乱七八糟的东西
Download:hg clone https://rayup.googlecode.com/hg/ rayup
没有安装 Mercurial 的话,可以访问 http://code.google.com/p/rayup/source/browse/,手动下载一个个文件……

称球问题扩展——根据当前已知信息选择最优称量方案

似乎是某个TopCoder SRM的题目。

N 个球,有一个是坏的,坏球重量与好球不同(略轻/重于好球)。有一个天平,可以告知左右两边孰重孰轻,最小化最坏情况下称量次数,给出称量方案。下面讨论该问题的一个扩展——如何通过已知信息(即之前称量结果,之前的称量结果可能不是最优的)选择下一步称量方案,最小化最坏情况下的称量次数。

根据已有信息把所有球分为4类:

  • 肯定是好球
  • 不可能比好球轻(不能确定是否为坏球)
  • 不可能比好球重(不能确定是否为坏球)
  • 不知道任何信息

每个球必定属于以上四类中的某一类。我们只需知道每一类的数目即可,具体编号无关紧要。令$s[nh][nl][nu]$表示有$nh$个1类球,nl 个2类球,nu 个3类球,最坏情况下需要称量的次数。枚举一边放置的各类型球数 lh(1类),ll(2类),lu(3类),枚举另一边放置的各类型球数 rh(1类),rl(2类),ru(3类),re(0类)。如果两边都有0类球,那么我们可以在两边各移去一个。我们可以保证0类球只出现在一边,不妨设为 rh(1类),rl(2类),ru(3类) 一边。

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NOIP 2004 数字游戏(虫食算)

下面程序可计算如下形式的式子:

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one
+ nine
+ fifty
+twenty
-------
eighty
a
+a
--
bc

方法是枚举进位+解方程,涉及的字母以及各个位上的进位作为变量,然后解方程。这样可以用 各个位上的进位 和 字母变量中的自由变量 表示 其他字母变量。枚举 各个位上的进位 和 字母变量中的自由变量 以求出 其他字母变量,以此得到各组解。使用方法:根据要求解的式子设置各个变量,N、M设置得大点没关系,L要正好等于式子的行数,然后输入L行字符串

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Dancing Links+Algorithm X求解数独

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#include <algorithm>
#include <limits>
#include <cstdio>
#include <cstring>
using namespace std;
const int N = 9, LEN = 3; //size
const int MAX_R = N*N*N, MAX_C = N*N*4, MAX = MAX_C+1+MAX_R*4;
int L[MAX], R[MAX], U[MAX], D[MAX], size[MAX_C+1], column[MAX];
int res[N*N]; //result
pair<int, int> mean[MAX]; //first: pos. second: number
int mapping[256];
char mapping2[N];
void insert(int cur, int left, int right, int top)
{
L[cur] = left; R[cur] = right;
U[cur] = U[top]; D[U[cur]] = cur;
D[cur] = top; U[top] = cur;
column[cur] = top;
++size[top];
}
void remove(int c)
{
L[R[c]] = L[c];
R[L[c]] = R[c];
for (int i = D[c]; i != c; i = D[i])
for (int j = R[i]; j != i; j = R[j])
{
U[D[j]] = U[j];
D[U[j]] = D[j];
--size[column[j]];
}
}
void resume(int c)
{
for (int i = U[c]; i != c; i = U[i])
for (int j = L[i]; j != i; j = L[j])
{
U[D[j]] = j;
D[U[j]] = j;
++size[column[j]];
}
L[R[c]] = c;
R[L[c]] = c;
}
bool DLX(int k)
{
if (R[MAX_C] == MAX_C) return true;
int c, mins = numeric_limits<int>::max();
for (int i = R[MAX_C]; i != MAX_C; i = R[i])
if (size[i] < mins)
mins = size[i], c = i;
remove( c );
for (int i = D[c]; i != c; i = D[i])
{
for (int j = R[i]; j != i; j = R[j])
remove(column[j]);
res[mean[i].first] = mean[i].second;
if (DLX(k+1)) return true;
for (int j = L[i]; j != i; j = L[j])
resume(column[j]);
}
resume( c );
return false;
}
int main()
{
char str[N*N+1], tmp[N*N+1];
str[0] = 0;
mapping['1'] = 0; mapping2[0] = '1';
mapping['2'] = 1; mapping2[1] = '2';
mapping['3'] = 2; mapping2[2] = '3';
mapping['4'] = 3; mapping2[3] = '4';
mapping['5'] = 4; mapping2[4] = '5';
mapping['6'] = 5; mapping2[5] = '6';
mapping['7'] = 6; mapping2[6] = '7';
mapping['8'] = 7; mapping2[7] = '8';
mapping['9'] = 8; mapping2[8] = '9';
while (strlen(str) < N*N)
scanf("%s", tmp), strcat(str, tmp);
int cur = MAX_C+1;
for (int i = 0; i <= MAX_C; ++i)
{
L[i] = i-1; R[i] = i+1;
U[i] = i; D[i] = i;
size[i] = 0;
}
L[0] = MAX_C; R[MAX_C] = 0;
for (int i = 0; i < N; ++i)
for (int j = 0; j < N; ++j)
if (str[i*N+j] == '.')
{
for (int k = 0; k < N; ++k)
{
insert(cur, cur+3, cur+1, i*N+k); mean[cur++] = make_pair(i*N+j, k);
insert(cur, cur-1, cur+1, N*N+j*N+k); mean[cur++] = make_pair(i*N+j, k);
insert(cur, cur-1, cur+1, N*N*2+(i/LEN*LEN+j/LEN)*N+k); mean[cur++] = make_pair(i*N+j, k);
insert(cur, cur-1, cur-3, N*N*3+i*N+j); mean[cur++] = make_pair(i*N+j, k);
}
}
else
{
const int k = mapping[str[i*N+j]];
insert(cur, cur+3, cur+1, i*N+k); mean[cur++] = make_pair(i*N+j, k);
insert(cur, cur-1, cur+1, N*N+j*N+k); mean[cur++] = make_pair(i*N+j, k);
insert(cur, cur-1, cur+1, N*N*2+(i/LEN*LEN+j/LEN)*N+k); mean[cur++] = make_pair(i*N+j, k);
insert(cur, cur-1, cur-3, N*N*3+i*N+j); mean[cur++] = make_pair(i*N+j, k);
res[i*N+j] = k;
}
if (!DLX(0))
puts("No solution.");
else
for (int i = 0; i < N; ++i, puts(""))
for (int j = 0; j < N; ++j)
putchar(mapping2[res[i*N+j]]);
}

2013年8月17日更新

NOIP 2009考了靶形数独,可能前一天我还敲了一遍这段代码……

.emacs

.emacs
很多 elisp 文件是通过 gentoo portage 安装的,部分不在 portage 里的放在了 ~/.emacs.d 下面

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(progn (cd "~/.emacs.d") (normal-top-level-add-subdirs-to-load-path))
(add-to-list 'load-path "~/.emacs.d")
; ----------
; window spliting
; ----------
(global-set-key (kbd "M-3") 'split-window-horizontally)
(global-set-key (kbd "M-2") 'split-window-vertically)
(global-set-key (kbd "M-1") 'delete-other-windows)
(global-set-key (kbd "M-s") 'other-window)
; ----------
; dired
; ----------
(setq dired-recursive-copies (quote always))
(setq dired-recursive-deletes (quote top))
(add-hook 'dired-mode-hook
(lambda ()
(define-key dired-mode-map (kbd "<return>")
'dired-find-alternate-file) ; was dired-advertised-find-file
(define-key dired-mode-map (kbd "^")
(lambda () (interactive) (find-alternate-file "..")))
; was dired-up-directory
))
; ----------
; ecb
; ----------
(require 'ecb)
; ----------
; yasnippet
; ----------
;(add-to-list 'load-path "~/.emacs.d/yasnippet-0.6.1c")
(require 'yasnippet)
(yas/initialize)
; (yas/load-directory "/usr/share/emacs/etc/yasnippet/snippets")
(yas/load-directory "~/.emacs.d/yasnippet/snippets")
; ----------
; ido
; ----------
(require 'ido)
(ido-mode 1)
; ----------
; gdb-many-windows
; ----------
(setq gdb-many-windows t)
; ----------
; iswitchb & ibuffer
; ----------
(defalias 'list-buffers 'ibuffer)
(iswitchb-mode 1)
(put 'narrow-to-page 'disabled nil)
(put 'narrow-to-region 'disabled nil)
; ----------
; mew
; ----------
(autoload 'mew "mew" nil t)
(autoload 'mew-send "mew" nil t)
(if (boundp 'read-mail-command)
(setq read-mail-command 'mew))
(autoload 'mew-user-agent-compose "mew" nil t)
(if (boundp 'mail-user-agent)
(setq mail-user-agent 'mew-user-agent))
(if (fboundp 'define-mail-user-agent)
(define-mail-user-agent
'mew-user-agent
'mew-user-agent-compose
'mew-draft-send-message
'mew-draft-kill
'mew-send-hook))
; ----------
; miscellaneous
; ----------
(add-hook 'text-mode-hook (lambda () (hl-line-mode 1)))
(global-linum-mode 1)
(column-number-mode 1)
(blink-cursor-mode 0)
(show-paren-mode 1)
(recentf-mode 1)
(setq default-directory "~/")
(global-set-key (kbd "C-x k") 'kill-this-buffer)
(setq ring-bell-function 'ignore)
(setq inhibit-startup-message t)
(setq initial-scratch-message "")
(defalias 'yes-or-no-p 'y-or-n-p)
(defun my-make-CR-do-indent ()
(define-key c-mode-base-map "\C-m" 'c-context-line-break))
(add-hook 'c-initialization-hook 'my-make-CR-do-indent)
; ----------
; auto-complete
; ----------
(setq hippie-expand-try-functions-list
'(try-expand-dabbrev
try-expand-dabbrev-visible
try-expand-dabbrev-all-buffers
try-expand-dabbrev-from-kill
try-complete-file-name-partially
try-complete-file-name
try-expand-all-abbrevs
try-expand-list
try-expand-line
try-complete-lisp-symbol-partially
try-complete-lisp-symbol))
(global-set-key [(meta ?/)] 'hippie-expand)
(require 'auto-complete)
(setq ac-auto-show-menu 0.2)
; ----------
; gccsense
; ----------
(require 'gccsense)
(add-hook 'c-mode-common-hook
(lambda ()
(local-set-key (kbd "M-TAB") 'ac-complete-gccsense)))
; ----------
; semantic
; ----------
; (semantic-load-enable-code-helpers)
; (setq semanticdb-default-save-directory "~/.emacs.d/semanticdb")
; (global-set-key (kbd "M-TAB") 'semantic-ia-complete-symbol-menu)
; ----------
; company-mode
; ----------
; (setq company-idle-delay t)
; (setq company--disabled-backends '(company-pysmell company-ropemacs))
; ----------
; lisp
; ----------
(add-hook 'lisp-interaction-mode-hook '(lambda () (eldoc-mode 1) (auto-complete-mode 1)))
(add-hook 'emacs-lisp-mode-hook '(lambda () (eldoc-mode 1) (auto-complete-mode 1)))
(add-hook 'slime-mode '(lambda() (eldoc-mode 1) (auto-complete-mode 1)))
(defalias 'eb 'eval-buffer)
(defalias 'er 'eval-region)
(defalias 'ee 'eval-expression)
(defalias 'elm 'emacs-lisp-mode)
(defalias 'eis 'elisp-index-search)
; ----------
; python
; ----------
(add-hook 'python-mode-hook '(lambda() (eldoc-mode 1)))
; ----------
; cc
; ----------
(defun my-c-mode-common-hook ()
(c-set-style "k&r")
(setq tab-width 4 indent-tabs-mode nil c-basic-offset 4)
(c-toggle-auto-hungry-state 1)
(c-toggle-electric-state 1)
(auto-complete-mode 1)
; (company-mode 1)
(add-to-list 'c-cleanup-list 'brace-else-brace)
(add-to-list 'c-cleanup-list 'brace-elseif-brace)
(add-to-list 'c-cleanup-list 'brace-catch-brace)
(add-to-list 'c-cleanup-list 'defun-close-semi)
(add-to-list 'c-cleanup-list 'one-liner-defun)
)
(add-hook 'c-mode-common-hook 'my-c-mode-common-hook)
(defun my-c-initialization-hook ()
(define-key c-mode-base-map "\C-m" 'c-context-line-break))
(add-hook 'c-initialization-hook 'my-c-initialization-hook)
(global-set-key "%" 'match-paren)
(defun match-paren (arg)
"Go to the matching paren if on a paren; otherwise insert %."
(interactive "p")
(cond ((looking-at "\\s\(") (forward-list 1) (backward-char 1))
((looking-at "\\s\)") (forward-char 1) (backward-list 1))
(t (self-insert-command (or arg 1)))))
; ----------
; cscope
; ----------
(require 'xcscope)
(setq cscope-do-not-update-database t)
; ----------
; goto-char
; ----------
(defun wy-go-to-char (n char)
"Move forward to Nth occurence of CHAR.
Typing `wy-go-to-char-key' again will move forwad to the next Nth
occurence of CHAR."
(interactive "p\ncGo to char: ")
(search-forward (string char) nil nil n)
(while (char-equal (read-char)
char)
(search-forward (string char) nil nil n))
(setq unread-command-events (list last-input-event)))
(define-key global-map (kbd "C-c f") 'wy-go-to-char)
; ----------
; hilight-tail
; ----------
(require 'highlight-tail)
(setq highlight-tail-colors
'(("black" . 0)
("#bc2525" . 25)
("black" . 66)))
(highlight-tail-mode 1)
; -----
; font
; -----
(set-default-font "Envy Code R VS-18")
; ----------
; color-theme (ir-black)
; ----------
(require 'color-theme)
(color-theme-initialize)
;; IR_Black Color Theme for Emacs.
;;
;; David Zhou
;;
;; The IR_Black theme is originally from:
;;
;; http://blog.infinitered.com/entries/show/8
;;
;; This theme needs color-theme.
;;
;; To use, put this in your init files:
;;
;; (require 'color-theme)
;; (color-theme-initialize)
;; (load-file "path/to/color-theme-irblack.el")
;; (color-theme-irblack)
(defun color-theme-irblack ()
(interactive)
(color-theme-install
'(color-theme-irblack
((background-color . "#000000")
(background-mode . dark)
(border-color . "#454545")
(cursor-color . "#888888")
(foreground-color . "#F6F3E8")
(mouse-color . "#660000"))
(default ((t (:background "#000000" :foreground "#F6F3E8"))))
(vertical-border ((t (:background "#666666"))))
(blue ((t (:foreground "blue"))))
(border-glyph ((t (nil))))
(buffers-tab ((t (:background "#141414" :foreground "#CACACA"))))
(font-lock-comment-face ((t (:foreground "#7C7C7C"))))
(font-lock-constant-face ((t (:foreground "#99CC99"))))
(font-lock-doc-string-face ((t (:foreground "#A8FF60"))))
(font-lock-function-name-face ((t (:foreground "#FFD2A7"))))
(font-lock-builtin-face ((t (:foreground "#96CBFE"))))
(font-lock-keyword-face ((t (:foreground "#96CBFE"))))
(font-lock-preprocessor-face ((t (:foreground "#96CBFE"))))
(font-lock-reference-face ((t (:foreground "#C6C5FE"))))
(font-lock-regexp-grouping-backslash ((t (:foreground "#E9C062"))))
(font-lock-regexp-grouping-construct ((t (:foreground "red"))))
(linum ((t (:background "#000000" :foreground "#666666"))))
(minibuffer-prompt ((t (:foreground "#888888"))))
(ido-subdir ((t (:foreground "#CF6A4C"))))
(ido-first-match ((t (:foreground "#8F9D6A"))))
(ido-only-match ((t (:foreground "#8F9D6A"))))
(mumamo-background-chunk-submode ((t (:background "#222222"))))
(font-lock-string-face ((t (:foreground "#A8FF60"))))
(font-lock-type-face ((t (:foreground "#FFFFB6"))))
(font-lock-variable-name-face ((t (:foreground "#C6C5FE"))))
(font-lock-warning-face ((t (:background "#CC1503" :foreground "#FFFFFF"))))
(gui-element ((t (:background "#D4D0C8" :foreground "black"))))
(region ((t (:background "#660000"))))
(mode-line ((t (:background "grey75" :foreground "black"))))
(highlight ((t (:background "#111111"))))
(highline-face ((t (:background "SeaGreen"))))
(left-margin ((t (nil))))
(text-cursor ((t (:background "yellow" :foreground "black"))))
(toolbar ((t (nil))))
(show-paren-mismatch ((t (:background "#FF1100"))))
(underline ((nil (:underline nil))))
;; mumamo
(mumamo-background-chunk-major ((t (:background "#000000"))))
(mumamo-background-chunk-submode1 ((t (:background "#0A0A0A"))))
(mumamo-background-chunk-submode2 ((t (:background "#0A0A0A"))))
(mumamo-background-chunk-submode3 ((t (:background "#0A0A0A"))))
(mumamo-background-chunk-submode4 ((t (:background "#0A0A0A"))))
;; diff-mode
(diff-added ((t (:background "#253B22" :foreground "#F8F8F8"))))
(diff-removed ((t (:background "#420E09" :foreground "#F8F8F8"))))
(diff-content ((t nil)))
(diff-header ((t (:background "#0E2231" :foreground "#F8F8F8"))))
;; nxml
(nxml-delimiter ((t (:foreground "#96CBFE"))))
(nxml-name ((t (:foreground "#96CBFE"))))
(nxml-element-local-name ((t (:foreground "#96CBFE"))))
(nxml-attribute-local-name ((t (:foreground "#FFD7B1"))))
)))
(color-theme-irblack)
(custom-set-variables
;; custom-set-variables was added by Custom.
;; If you edit it by hand, you could mess it up, so be careful.
;; Your init file should contain only one such instance.
;; If there is more than one, they won't work right.
'(canlock-password "30539d11124ba9fd0c889bdd7e4471cf6a3bfe95")
'(dired-dwim-target t)
'(ecb-options-version "2.40")
'(ecb-primary-secondary-mouse-buttons (quote mouse-1--mouse-2))
'(highlight-changes-colors nil))
(custom-set-faces
;; custom-set-faces was added by Custom.
;; If you edit it by hand, you could mess it up, so be careful.
;; Your init file should contain only one such instance.
;; If there is more than one, they won't work right.
)
(put 'scroll-left 'disabled nil)
(put 'set-goal-column 'disabled nil)
(put 'dired-find-alternate-file 'disabled nil)

2013年8月17日更新

记得这是NOIP 2009前的停课时期,我做题无聊了就折腾Linux下的各种工具,此兴悠哉!来机房也不都是来做题的,来“操机”的不少,我觉得隐隐有危机,果不其然后来机房就只在一周的少数几天开放了。