From f436d4f3d0ae846cefb161178e69f013ef4b1bbb Mon Sep 17 00:00:00 2001 From: CyC2018 <1029579233@qq.com> Date: Tue, 13 Mar 2018 22:00:59 +0800 Subject: [PATCH] auto commit --- notes/剑指 offer 题解.md | 15 +++++++++++++++ pics/2a398239-ee47-4ea1-b2d8-0ced638839ef.png | Bin 0 -> 3072 bytes pics/72f9bc11-06a9-40b4-8939-14f72e5cb4c3.png | Bin 0 -> 3072 bytes 3 files changed, 15 insertions(+) create mode 100644 pics/2a398239-ee47-4ea1-b2d8-0ced638839ef.png create mode 100644 pics/72f9bc11-06a9-40b4-8939-14f72e5cb4c3.png diff --git a/notes/剑指 offer 题解.md b/notes/剑指 offer 题解.md index b4b6262f..92605b33 100644 --- a/notes/剑指 offer 题解.md +++ b/notes/剑指 offer 题解.md @@ -675,6 +675,19 @@ private void printNumber(char[] number) { ## 18.1 在 O(1) 时间内删除链表节点 +**解题思路** + +- 如果链表不是尾节点,那么可以直接将下一个节点的值赋给节点,令节点指向下下个节点,然后删除下一个节点,时间复杂度为 O(1)。 + +

+ + +- 否则,就需要先遍历链表,找到节点的前一个节点,然后让前一个节点指向节点的下一个节点,时间复杂度为 O(N)。 + +

+ +- 综上,如果进行 N 次操作,那么大约需要移动节点的次数为 N-1+N=2N-1,其中 N-1 表示不是链表尾节点情况下的移动次数,N 表示是尾节点情况下的移动次数。那么增长数量级为 (2N-1)/N \~ 2,因此该算法的时间复杂度为 O(1)。 + ```java public ListNode deleteNode(ListNode head, ListNode tobeDelete) { if (head == null || head.next == null || tobeDelete == null) return null; @@ -692,6 +705,8 @@ public ListNode deleteNode(ListNode head, ListNode tobeDelete) { } ``` + + ## 18.2 删除链表中重复的结点 ```java diff --git a/pics/2a398239-ee47-4ea1-b2d8-0ced638839ef.png b/pics/2a398239-ee47-4ea1-b2d8-0ced638839ef.png new file mode 100644 index 0000000000000000000000000000000000000000..2290e8e9c1faee7f1b3ad88cd96c6c27d46187dd GIT binary patch literal 3072 zcmeHJX;f2577mNeCTb#!EP@?)`q)GfqLEGTLBfj)K~xr{TXvfUWa|zv0Y%U}wipOu z5rRHkaHX+9!6vw&1Y#3|4j^hojU*_7?1C)wbk3PG|7Onom|y*)s_wm2=T?2U?sv|I z`0S!+YZ_|ea5!x*D&&j9DM>JUyZU$7eBaPD5?hoKeJSp^Yn{e}n4=o$w$lxVt7B`; z9bAI>8i%O?i8$P{`(KArTU<>T76ZH>H$O)3$IASe7tI9RlguEh)}gyLjoJ16dR^{; znDf2OS z!j#h&7v>kZA@v#qi6nOv-!b6?(m6-x=4Qqhb1v68^Z9%!zpCnjx~zTQtl#?&CAL3E z#VJhY{3(0_#H|soNuT>nx4!nUL0QrfPe+NzgoOFo$>`Cy?N+MZGAB-@!{^T=+9qPK z9Pum2CFmMJJjKnpR|_qckt&>s_=Nkdw_lF!LHH_wr5z4P)qZm*X+{LW-(H~vN}}&j zx&f}D2}4&&M|(UGz7}BFWdNkc{D)wKH!}7dolZaFHHCps@BWqH>qh z8RuM_4C`WtUUiL@D<(J8B@d;wMqL8n>oF;2|B%wDaBF}l zQYD$W2|y2Xch6VX+&K}-g)9mlQ7&dUhlH7U#z!uLnICjHDrP{3@!@$kkzdFN3>${! zD{O6T7p+*by@M6ukZbDjvHck^^SyzD9sK2pL&d?NnU!Q9&}&COi1@a8a;m6~Mwry>xZN0^c z{QETSk_)z1mC4X^d|pb*&oQGcS?KOqfW{peG(zefKxk%|L=oDPdaVfn9Qw>qL}rD+ zuX}wPi6{JTUWHz96+6)@L010qC`aN{K+CWmG8Wt&OS?VIjZ%$i+cMq^N{n6t9Y<1Z zJ+hFR$|I$B==9xAy^5>AR?CP&MNQ31m5BpL>^hP4z|oZO^mgx-+WZ&8c4MP9gz#ZS zq!!}2tASNBDmq;|Q%Vp>_Ml67*=ydk=l#Jq3{lpYeM($m%z56)VaIU5c71vg&OCK^ z_aSSjV)xcs`_8Ut5i8OEK4(LTsAZDnL*sh z+MKD*l~u1UJbk=$Th1XXh3VUz8)gbKW@q*vd(ozyEuI?>Z0CXPewie)Ufm8xdS}~P zyc zF|=imcwrKWH_6M|*9xn0UtUIv_U2RjjSls(=y30Ys{> zr0WrL)U@t}#1w-u4OtJ|bj*bb@qtus{>lxe^$j<0LpJojNG2_D!zrjt>`cO^+~P() zc1ItXL2fN5bWtg2%65dEJ_OLmoMZ;A<@g3dw(vD}lQ(kQX;VOO+EYHIeZDtzvG&Ym zD761)W4#l~)U+T?s@U>kV{Eot6wSrQWU)JcUVxC%Q?s=vl5cUDJYSfKSo(^y2;*^ggI|mBsZ& z(uZxke3num*&Ql!UGH3rhip#vrHf2XaI;=5=4cIqNWx3sS1y_Zd8gQnHDKj9RhDY+ zj^>?tTB}FD6g|T*`SRKv#)pq4x)~Wb1BLpryj6fCAml6*iQozO>rQ7ZNz(z7*e{M0 z{Sco%_*w96Hw&6xI+n}iRVSImZ$W|$^sHiu5lA09^C!en5rE3q;gy!;MvIA00^-cU zEGLIM}S*KXCF_Y3}a;5AtnBy=q=y7qmS+)E# zt>?DBuu^S#<_JyxB6m(2et46ZY!-`_{7Yf5sK8eVa+UyC5{bSDK^Kp|2w^&d<%dEZ x5M+sofqxey|JCt5&4PI~WgAJEVcm08Ohw_mJa$3X+<(mci~oP||NqJVe*nKrxGMkv literal 0 HcmV?d00001 diff --git a/pics/72f9bc11-06a9-40b4-8939-14f72e5cb4c3.png b/pics/72f9bc11-06a9-40b4-8939-14f72e5cb4c3.png new file mode 100644 index 0000000000000000000000000000000000000000..605cd1642d2ad975cc82db499d78b4dd980e5ec0 GIT binary patch literal 3072 zcmeHJ{X5j#7N1TjQQZ@RNF@^)6N)&55k|&1-b-IhXi#d7Fj9z=s~X>tx8p6vR6~?6 z`etTo@|GB5B+6)L2sdxXBgtEiw{gC@f55%Z{qa6$KWl&XUh8>2YpuQav!1n+T%GN= z%BjhrP^hgAM1ngCwN8xekIHUDu-M)6DYC4KaJRQXmA9#nA4n}0JUZIRPQJ#HtO%U7k z$kEzrJ7|}e_XJ67W^{RIk5?bFYMyw>Q2I?18E;)71h=~VN9;%}E-vo!89fGrbfO~u z>hhn{|7y6^pRh7F-Zjn|wS~dvN3Q-%CUX^(1SCl!(t6J7cVD>~odj&Yz&!C3JV7uS zo*8Wq<(o{6iHhTQJH{?d4_Ew@FQDD+!dqDEFlR_C6kCJ7FGyFGsGhyQtPzSlf4d#g z)K%f74%t=3`QaW)xdOSK;&UlS^ zQ^#}dB9Pm72-p$S5I_!lm;i%oY&u1WudCVdGhY`;t#B`R0*#Pu(WU73OD`{s3o&XE)C2r{^v&vKje}j61$@!Z@6`Y{Jw7WGQdrXs?W$?yN5Oo&+u{vnW z?mc_@oi)tTOC~&;8X6jW;=5^eTtC&$65n^5&WEYyh-Kp1@x5oPBu73mmxiY<+{VO$ z(QXiHr_1&SyS4WHltx_9E8O4dS@I}sm>QylB1uZjoln8iM8=dZi?NA^;RN>Z+w4Qw&nY-s~wA03#D?XuJ))u*CyJ>E+( zc5+{XVZ%L~?{oBLuTm9oR9MX2FxU{4b%QD3S?w}U5t>B5%@%a0)@CnF#}wfBJq%j! z*lIJ;yk+VW4ve&E%&Tm3dlxFHH=VuNxNELYYe-{4;}{ruQU8lIgz2ja3=E-2qx;?V z_dHlWT&7Y4*hBRh(0cyMgi1zaVJ~`o54w~xyws6gM>zpSnB@awgPdBdCtnRQ-)Odj zb;Z1U&d_q!PDR4&&c!HYm_}aoUQ(e~(z6Cd_KQAJoU17VP+h+W`1}K$lUm7*q(b^D zRd*?;ny~ylyn;u4`F7mk<;TSS7BLN{GIso_Pu)B@H-{b0usbFFpv}1S(!UGLIuw#F z@5A6&;N$cJM|e*^Txkyq40(AO)^7jk+;t6c_LWaE+}q{prcF|{Xq&lH?ZdzZ!i z!m!nw1R8bOhR;kU+#rz|Sy4Dc*zhI-j8uKgClxyo60DT`Nc)U+v(X~*Iu7v_nw<{s zhf|V`dGFjIOu%j6`cz5W#6cDQ;&b52CJyR-$`G4U)Nm0`8#Z+uR)c943g?}|4ro3X z3C?{ZYlk`=3UaJ7YjPK+C{Pz&4(`VARABeCKi+h_KHerQxxba_74iBpAON!#{EXuD znva+k0S-2DMEse6szlkav2n*>mki3{E?j+raQ?JIpD~}kCF8mvRErX%9=uZ!tfU?q zlVEK=W;9b^^K3s%d+5%s`_f)kKb|BJ%Eyg_7lfwECsR`zE;)pgtWV$Nx-7A^Y0HMe zxD{vpr|s^!=HeX!GDumOpVSO?X^M2}9AOR=rj7F6;=xF~6Ccb42>ta^ z|6Dz!cn^){`lJmi4q1h?eu$)2dZh(VB=Wh$L)u}kR)}9K}seD@AifKYZ{=K`8f3S+KRNmjUqV3Um8P z0aX@{$Ke3|0R|MO@E#J>>#C3XX4}-AAl2vOg?%|u z7KJZbPwkl3@N7!sj#kAjUY*e89UHNQcb|kfie)}RHB1alfQA;?%%SbZaO+BJkf{n^ zat#A2?Xb$#(D+fbi{e&7zNFJ&L9k%v1@AL%pSahR*x$V%cUVT0|rk1MNtL3+Yi9q}M&d=e5VzV$H$ zfd|~li+wNR-;n!m0P_m0M({YWg_SVxVjklGa>QKU`V)TB{)NCtv7`%^@jHtjQ~EB~ zswu_zSN**@emHt*mz;SEeuRxPG@XgZIZLpf!5(-F`W>zT5FI~E&f+zTTt6ZqX% zett9b$u=21UO*{C0%7=h{&B6hrz1B^>}OJ!YE^>YCN*vefC_y#DX`W zoSfBOW{GKhnPYkn7+(FI@p!=AZc