Removes an element or a range of elements in a list from specified positions.錛堜粠鎸囧畾鐨勪綅緗紝縐婚櫎list涓竴涓厓绱狅紝鎴栬呮槸縐婚櫎涓鍧楀尯鍩熺殑鍏冪礌錛?/p>
锘??xml version="1.0" encoding="utf-8" standalone="yes"?>
Removes an element or a range of elements in a list from specified positions.錛堜粠鎸囧畾鐨勪綅緗紝縐婚櫎list涓竴涓厓绱狅紝鎴栬呮槸縐婚櫎涓鍧楀尯鍩熺殑鍏冪礌錛?/p>
Return Value錛?br> A bidirectional iterator that designates the first element remaining beyond any elements removed, or a pointer to the end of the list if no such element exists.
鎴戠殑鐞嗚В鏄細涓涓弻鍚戠殑榪唬鍣ㄦ寚鍚戠Щ闄ゅ厓绱犳垨鍏冪礌鍧楃殑 涓嬩竴涓瓨鍦ㄥ湪鍏冪礌銆俹r 褰撳湪璇ist 涓病鏈夋壘鍒拌鍒犻櫎鐨勫厓绱狅紝閭d箞灝嗘寚鍚?end.
濡傛灉鎴戞兂鍦ㄤ竴涓猯ist涓繚瀛?1---10錛岀劧鍚庢煡鎵懼茍涓?鍒犻櫎5 鐨勪唬鐮?搴旇鏄?br>
#include <iostream>
#include <list>
using namespace std;
list<int> lst;
int main()
{
for (int i = 0; i < 10; i++)
{
lst.push_back(10-i);
}
list<int>::iterator it = lst.begin();
for (; it != lst.end();)
{
if((*it) == 5)
{
cout << "Find It" << endl;
cout << (*it) << endl;
lst.erase(it);
cout << (*it) << endl;//榪欎笉鏄垜鎯寵鐨? 鑰屾槸涓涓殢鏈烘暟瀛?br>
break;
}
else
{
it++;
}
}
it = lst.begin();
lst.erase(it);
cout << (*it) << endl;//榪欏鍚屾牱鐨勯棶棰?nbsp;
for (it = lst.begin(); it != lst.end(); it++)
{
cout << (*it) << endl;
}
return 0;
}
鍏抽敭鏄疪eturn 鐨勮繑鍥炪傘傘傘傘?br>閭d箞灝辮涓涓?it = lst.erase(it); 姝ゆ椂鐨?it 鎵嶆槸鎴戣瑕佺殑錛屼篃鏄疪eturn 鎵鎻忚堪鐨勩傘傘?br>浠g爜 濡備笅錛?br>
#include <iostream>
#include <list>
#include <vector>
using namespace std;
list<int> lst;
vector<int> vec;
int main()
{
for (int i = 0; i < 10; i++)
{
lst.push_back(10-i);
vec.push_back(i);
}
list<int>::iterator it = lst.begin();
for (; it != lst.end();)
{
if((*it) == 5)
{
cout << "Find It" << endl;
cout << (*it) << endl;
it = lst.erase(it);//娉ㄦ剰瑕佹帴鍙楄繑鍥炵殑鍊?br>
cout << (*it) << endl;
break;
}
else
{
it++;
}
}
vector<int>::iterator it2 = vec.begin();
for (; it2 != vec.end(); it2++)
{
if((*it2) == 5)
{
cout << "Find it in vector" << endl;
cout << *it2 << endl;
it2 = vec.erase(it2);//娉ㄦ剰瑕佹帴鍙楄繑鍥炵殑鍊?br>
cout << *it2 << endl;
}
}
it = lst.begin();
it = lst.erase(it); //娉ㄦ剰瑕佹帴鍙楄繑鍥炵殑鍊?br>
cout << (*it) << endl;
for (it = lst.begin(); it != lst.end(); it++)
{
cout << (*it) << endl;
}
return 0;
}
]]>
]]>
2)涓澶╂竻鏅紝浜轟滑鍙戠幇涓瀹跺晢搴楃殑淇濋櫓鏌滆鎾紝澶滈噷瀹堝簵鐨?鑰佸ご琚潃姝伙紝鎶涗漢娌充腑銆傚案浣撴墦鎹炰笂鏉ュ悗錛屼竴涓鍙殑璀﹀療鍦?姝昏呰。琚嬮噷鍙戠幇浜嗕竴鍧楄蛋鏃跺緢綺劇‘鐨勯珮綰ф琛紝浣嗗凡鍋滄榪?琛屻傛棤鐤戯紝琛ㄩ拡鎵鎸囩ず鐨勬椂闂存槸涓涓潪甯擱噸瑕佺殑綰跨儲銆傚彲鏄紝 閭h瀵熷繕璁頒簡瑕佷繚鎶ょ幇鍦虹殑瀹堝垯錛岀珶鎶婃琛ㄧ殑鎸囬拡鎷ㄥ紕浜嗗嚑 鍦堛?渚︽帰闀塊棶浠栨槸鍚﹁寰楁嫧寮勫墠鏃墮拡鎵鎸囩ず鐨勯挓鐐?閭h瀵?鎶ュ憡璇?"鍏蜂綋鏃墮棿娌℃湁緇嗙湅錛屼絾鏈変竴鐐規垜鍗拌薄鍗佸垎娣卞埢錛屽氨鏄?鏃墮拡鍜屽垎閽堟濂介噸鍙犲湪涓璧鳳紝鑰岀閽堝嵈鍋滅暀鍦ㄤ竴涓枒鐐圭殑鍦?鏂廣? 渚︽帰闀跨湅浜嗙湅鎬琛紝琛ㄩ潰鏈夋枒鐐圭殑鍦版柟鏄?9縐掋備粬椹笂 鎷垮嚭綰歌綆椾簡涓涓嬶紝寰堝揩灝辯‘瀹氫簡灝鎬綋鎶涘叆娌充腑鐨勭‘鍒囨椂闂達紝 浠庤岀緝灝忎簡鐮存鑼冨洿錛屽緢蹇姄鍒頒簡鍑舵墜銆?浣犵煡閬撴琛ㄦ寚閽堢┒绔熷仠鍦ㄤ粈涔堟椂鍒誨悧?
3)A銆丅銆丆銆丏鍥涗釜瀛╁瓙鍦ㄦ搷鍦轟笂璧涜窇錛屼竴鍏辮禌浜嗗洓嬈♀斺斿叾涓瑼姣擝蹇殑鏈変笁嬈★紝B姣擟蹇殑涔熸湁涓夋錛孋姣擠蹇殑涔熸槸涓夋銆?鎴栬澶у浼氭兂鍒癉涓瀹氭槸鏈鎱€傚彲浜嬪疄涓婏紝鍦ㄨ繖鍥涙涓紝D涔熸瘮A蹇笁嬈°?br>
4)1銆?銆?鏄緢鍗曠函鐨勬暟鐮併?闂?鐢ㄨ繖涓変釜鏁扮爜琛ㄧず鐨勬渶澶ф暟瀛楄鏄灝?
5)涓闀挎柟褰㈢殑鍗囨枟錛屽畠鐨勫縐槸1鍗囥傛湁浜轟篃縐頒箣涓虹珛鍗囨垨鍏崌銆傜幇鍦ㄨ姹備綘鍙嬌鐢ㄨ繖涓崌鏂楋紝鍑嗙‘鍦伴噺鍑?錛?鍗囩殑姘淬傝闂簲璇ユ庢牱鍔炴墠鑳藉仛鍒拌繖涓鐐瑰憿錛?br>
6)鎯蟲妸涓寮犵粏闀跨殑綰告姌鎴愪袱鍗婏紝緇撴灉涓ゆ閮芥病鎶樺噯銆傜涓嬈℃湁姣斿彟涓鍗婇暱鍑?鍏垎錛岀浜屾姝eソ鐩稿弽錛岃繖涓鍗婂張鐭簡1鍏垎銆傝瘯闂紝涓ら亾鎶樼棔涔嬮棿鏈夊瀹?
7)涓浣嶉┈杞﹀か鎷夌潃鐢層佷箼涓や綅涔樺錛屼袱浣嶄箻瀹㈡槸寰鍚屼竴鏂瑰悜鍘葷殑銆傝蛋浜?閲岃礬錛岀敳涓嬭濺浜嗐傜劧鍚庯紝鍙堣蛋4閲岃礬涔欐墠涓嬭濺銆傝濺璐逛竴鍏辨槸12涓摐閽便傞棶錛氱敳涔欏悇搴斿垎鎽婅濺璐瑰灝?
8)涓変漢榪涘叆鏃呴銆傛梾棣嗙粡鐞嗚姣忛棿瀹㈡埧闇瑕?0鍏冧竴鏅氥備簬鏄紝姣忎漢鎷垮嚭10鍏冨悗灝辮繘鍏ュ鎴褲備笉涓浼氬効錛岀粡鐞嗗彂鐜板鎴垮彧瑕佹瘡闂存瘡鏅?錛曞厓錛屼究鍚╀粯鏈嶅姟鐢熸壘榪樹粬浠紩鍏冦傞斾腑錛屾湇鍔$敓姝h綆楁庢牱鎶?鍏冨垎緇欙紦涓漢銆備簬鏄紝浠栬繕姣忎漢錛戝厓鑰岃嚜宸辨敹錛掑厓銆?
榪欐剰鍛?浜烘誨叡浠?7鍏冪殑鎴跨銆傚姞鏈嶅姟鐢熺殑2鍏?= 29鍏?銆?閭d箞錛岃繕鏈夛紤鍏冨憿錛?br> 9)
灝忔槑鍜屽皬绱呴兘鏄紶鑰佸笀鐨勫鐢燂紝寮犺佸笀鐨勭敓鏃ユ槸M鏈圢鏃ワ紝2浜洪兘鐭ラ亾寮犺佸笀鐨勭敓鏃ユ槸涓嬪垪10緇勪腑鐨勪竴澶╋紝寮犺佸笀鎶奙鍊煎憡璇変簡灝忔槑錛屾妸N鍊煎憡璇変簡灝忕磪錛屽紶鑰佸笀闂粬浠煡閬撲粬鐨勭敓鏃ユ槸閭d竴澶╁悧錛?3鏈?鏃?3鏈?鏃?3鏈?鏃?鏈?鏃?鏈?鏃?9鏈?鏃?鏈?鏃?2鏈?鏃?12鏈?鏃?12鏈?鏃?
灝忕磪璇達細鏈締鎴戜篃涓嶇煡閬擄紝浣嗘槸鐜板湪鎴戠煡閬撲簡
灝忔槑璇達細鍝︼紝閭f垜涔熺煡閬撲簡
璇鋒牴鎹互涓婂璇濇帹鏂嚭寮犺佸笀鐨勭敓鏃ユ槸鍝竴澶?
絳旀:
1) 絳旀: 鍚噾鐐瑰氨鏄笉鐭ラ亾杞婚噸,鎴戝枩嬈?
鎶?2 涓垎 3 鍫?姣忓爢4涓?緙栧彿鎴栨秱鑹叉爣璁頒笅A B C 鎴?綰?緇?nbsp; 钃?鍦ㄨ繖閲屼負浜嗘弿榪板氨鎶婁笉鍚堟牸鐨勭悆鍙潖鐞冧簡.
騫朵笖鎶婃瘡緇勪腑鐨勭悆鏉ョ紪涓嬪彿渚夸簬璁茶堪.
絎竴嬈?璋佽竟鎵句袱緇勬潵姣旇緝,灝遍夋嫨 A B 涓ょ粍鎶?
鎯呭喌1:澶╁鉤騫寵 ,閭d箞鍧忕悆灝卞湪C緇勪腑,鍐嶅彇C涓殑浠繪剰涓ょ悆姣旇緝,
鎯呭喌涓:騫寵 ,閭d箞鍧忕悆灝卞湪C鍓╀笅鐨勪袱鐞冧腑,鎷塊櫎浜嗚繖涓ょ悆澶栫殑浠繪剰涓涓悆鏉ヤ笌浠栦咯
涓殑浠繪剰涓涓瘮杈?緇撴灉灝變笉璦鑰屽柣浜嗗惂.
鎯呭喌浜?涓嶅鉤琛?閭d箞鍧忕悆灝卞湪榪欎咯鐞冧腑,鐢ㄤ笂闈㈠悓鏍風殑鏂規硶,鍙栧闈㈢殑浠繪剰涓鐞冩潵姣?br> 杈?緇撴灉涔熷氨鍑烘潵浜?
鎯呭喌2:澶╁鉤涓嶅鉤琛?閭d箞鍧忕悆灝卞湪A B浠繪剰涓緇勪腑,榪樺彲浠ュ垽鏂?A B 涓繀瀹氭湁涓鏂歸噸,涓鏂硅交.鍋囪A閲?br> 浜嶣 ,閭d箞灝辨潵縐扮浜屾.(鍦ㄦ灝辨槸閲嶈鐨勬濈淮鏂瑰紡浜?.鍦ㄥぉ騫充袱渚у垎鍒斁A1,B1,C1 鍜?A2,A3,
B2,閭d箞灝辨湁A4,B3,B4,鐣欏湪澶栭潰浜?鍏堢湅澶╁鉤涓殑.
鎯呭喌涓:澶╁鉤騫寵 :閭d箞灝辨潵鐮旂┒澶╁鉤澶栭潰鐨凙4,B3,B4 縐扮涓夋鎶婂ぉ騫充袱杈規斁B3,B4
1:濡傛灉騫寵 ,閭d箞鍧忕悆灝辨槸A4,
2:濡傛灉涓嶅鉤琛?閭d箞灝辨槸杞葷殑鍝釜鐞?鍥犱負B 緇勮交浜嶢緇?鍙堜互涓婂彲鐨凙緇勬槸濂界悆,鎵浠ヨ鐞?br> 姣斿ソ鐞冭交,閭d箞灝辮兘寰楀嚭緇撹浜?
鎯呭喌浜?澶╁鉤涓嶅鉤琛?閭d箞鎴戜滑灝辮鎶婄劍鐐規柟鍦ㄥぉ騫充腑鐨凙1,B1,A2,A3,B2,涓婁簡,鍥犱負姝ゆ椂鐨凜緇勯兘
涓哄ソ鐞?鐢ㄤ笂闈㈠悓鏍風殑鏂規硶,
1 .濡傛灉 A1+B1+C1 > A2+A3+B2 閭d箞鍧忕悆灝辨槸鍦ˋ1鎴栬匓2涓殑涓涓媺,閭d箞灝卞湪榪欎袱鐞冨
璋佽竟鍙栦竴涓悆鏉ヤ笌浠栦滑浜轟竴涓潵姣旇緝,緇撴灉鐨勯獙璇佹楠や笂闈㈢殑鐩稿悓鎷?
2. 濡傛灉 A1+B1+C1 < A2+A3+B2 閭d箞鍧忕悆灝辨槸鍦˙1,A2,A3涓?榪欐牱鍙堝洖鍒板拰涓婇潰鏈変釜姝ラ
鐩稿悓浜?灝辨槸鍐嶇О絎笁嬈?鎶夾2,A3鏀懼湪澶╁鉤涓よ竟,
涓:澶╁鉤騫寵 ,閭d箞灝辨槸B1鏄潖鐞?鑰屼笖榪樺皬浜庡ソ鐞冪殑璐ㄩ噺.
浜?澶╁鉤涓嶅鉤琛?閭d箞閲嶇殑閭d釜灝辨槸鍧忕悆,鑰屼笖閲嶉噺姣斿ソ鐞冮噸.
濡傛灉浣犺繕娌$湅鏄庣櫧,鎴戝湪鏉ユ彁閱掍綘娉ㄦ剰 絎竴嬈?A > B . 絎簩嬈?A1 + B1 + C1 > A2 + A3 + B2;
娉ㄦ剰閲嶇殑鏂瑰悜,鍙互澶ф浼拌涓嬪鏋滃潖鐞冮噸涓庡ソ鐞冮偅涔堝氨鍦ˋ緇勪腑鐨勫嚑涓悆涓夋嫨,鐩爣灝卞皬澶氫簡,浠ュ悗鐪嬪埌澶╁鉤涓嶅鉤琛″氨鎵鵑噸鐨勯偅鏂圭湅鏄惁鏈堿 緇勪腑鐨勭悆.
2) 絳旀:
鎬琛ㄦ寚閽堝仠鍦?鏃?1鍒?9縐掋?榪欐槸鍥犱負:鍦?2灝忔椂鍐咃紝鏃墮拡涓庡垎閽堟湁11嬈¢噸鍚堟満浼氥?鏃墮拡鐨勯熷害鍙堟槸鍒嗛拡鐨?/12,鍥犳錛屽湪涓婁竴嬈¢噸鍚堜箣鍚庯紝姣?12 闅?灝忔椂5鍒?7鍙?/11縐掞紝涓ら拡鍙堣鍐嶅害閲嶅悎涓嬈°傚湪鍗堝闆剁偣浠ュ悗錛屼袱閽堥噸鍚堢殑鏃墮棿鏄? (1)1鏃?鍒?7鍙?/11縐掞紝 (2)2鏃?0鍒?4鍙?/11縐掞紝 (3)3鏃?6鍒?1鍙?/11縐掞紝 (4)4鏃?1鍒?9鍙?/11縐掋?鑰岃瀵熺湅鍒扮閽堝仠鍦ㄦ湁鏂戠偣鐨勫湴鏂規濂芥槸49縐掑銆?
A B C D
B C D A
C D A B
D A B C
鎶撲綇瀵硅綰挎妸闀挎柟浣撳垎瑙f垚鐩哥瓑鐨勪袱閮ㄥ垎,鎺ヤ笅鏉?鎴戞兂浣犳瘮鎴戣繕娓呮浜嗘妸,鏈夌偣鍍忓垵涓墿鐞嗙煡璇?
鍚庡洓鍏噷鏈変箼璧勮垂 灝?6 閾滈挶,涔欎竴鍏辮祫璐?= 6 + 3 = 9 涓摐閽?
鍥犱負浠栦滑涓鍏變粯鍑虹殑閽?= 鑰佹澘鏀跺叆鐨?5 + 鏈嶅姟鍛樼殑2 = 27 鍏?
鍒氬ソ鏄瘡浜哄嚭浜? 鍏?
鑰屼笉鏄粯鍑轟簡30 鍏?
]]>