标题:字母阵列(dfs)

 

仔细寻找,会发现:在下面的8x8的方阵中,隐藏着字母序列:"LANQIAO"。
SLANQIAO
ZOEXCCGB
MOAYWKHI
BCCIPLJQ
SLANQIAO
RSFWFNYA
XIFZVWAL
COAIQNAL

我们约定: 序列可以水平,垂直,或者是斜向;
并且走向不限(实际上就是有一共8种方向)。
上图中一共有4个满足要求的串。

下面有一个更大的(100x100)的字母方阵。
你能算出其中隐藏了多少个“LANQIAO”吗?

FOAIQNALWIKEGNICJWAOSXDHTHZPOLGYELORAUHOHCZIERPTOOJUITQJCFNIYYQHSBEABBQZPNGYQTCLSKZFCYWDGOAIADKLSNGJ
GSOZTQKCCSDWGUWAUOZKNILGVNLMCLXQVBJENIHIVLRPVVXXFTHQUXUAVZZOFFJHYLMGTLANQIAOQQILCDCJERJASNCTLYGRMHGF
TSDFYTLVIBHKLJVVJUDMKGJZGNNSTPVLCKTOFMUEUFSVQIAUVHNVFTGBDDARPKYNNCUOYUAZXQJNOEEYKLFRMOEMHUKJTPETHLES
FKVINSLWEVGAGMKVFVIUBMYOIAFHLVNKNTYKTZWVXQWRWIGPENFXYDTKRVPKRTHMGHVYOCLDCKMEKRLGEKBYUCLOLYPAKPFSOREH
KWPUOLOVMOFBIXYACWRDYBINTMPASPCEOKHXQIGBQQMCEOIVULIEOPFSCSIHENAJCVDPJDOIWIIULFDNOZOFVAMCABVGKAKCOZMG
XWMYRTAFGFOCNHLBGNGOXPJSTWLZUNNAGIRETGXFWAQSSJPFTQAXMTQWMZWYVEPQERKSWTSCHSQOOBGXAQTBCHOEGBDVKGWJIFTG
ZWWJEIISPLMXIMGHOOGDRZFTGNDDWDWMNUFWJYJGULPHNUFSAQNNIUVAAFZIAZKFXXNWCEABGJAUMGYEIEFVQXVHHHEDYUITRCQB
XZHDPZQTOBECJVBZLACVXACZEDYOGVAVQRNWEOWGRAQYUEUESTEDQTYJUTEFOOITSHDDZHONJGBRCWNEQLZUTBNQIADKNFIOMWZR
EBFKCVNLURZSNPOLTISRPDTNUMCDGKTYRGIOVEPTUTSBAWQKWWEUWIWHAANUZUADGZEATZOQICWFUJTWNZDBKLQNELWVTBNDLNFH
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KGKBTBHGWKVJYZCOVNSKUREKZEIWVLOHAMUAYKLUGHEUESICBZAHURNTJAECTHRNKSIJQFIPVZANSZYSPJWHPKHCAPEYWNXUYQSD
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NMBKMUENVGXXVMQCLXPJDQIQCFWYADIFDSGINGZDJYHPUPXVRMWDIPJRWPNRYOFGYYPEAVKDEMLYRRRMNCRQXPTDSQIVKKGJWDEF
SBAEKIFZCKDOMIQKBDWVQGBYWPDIBOLQUGAQRXLJDAZMXVZXYSNWEWTNZKYREMBEUHOTFOCKEJSXCMUBCKXNGQXTQJRCRCLWJTOI
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RDOTIDCFEESOKYPYCGQQKOGPMGJRITSVTKOKDSXLRLJRRHNFRFXCMDNQMCEGZFJWHZOAFBQXXPXNBSWTSUYPAWQRHAUGLNPBRSJT
HOWRIUGMOQTUYIHDWJRFBWWKWYKCICSVBVKTBIIWGFSVIFCTUKIHHUUISCOTEOYRWQXTAEBXQQOLLMOALNIYVCCHNSWIKHMYYNZO
OFRIYYXPPSRTPAYMUJSSDILKIZAYSEIOLANQIAOVKARDPGVFCSYBSNHAPGTIKLAWTTKOEADWRLAACAAFYTBTNSGFTYLYUHJXBMMA
NJFTMLUIBKDPWBXQOMBVQXCZOIREHRSZCSJOIVBXWQIBUTYBQNTZRVROHGOIZYAJWXLEATLOZJIKJMIHSLGSVTCXJWIOOGWSERRQ
DBQJNGBLRIYFIKHBEYOZQBOAGGNIZKFDHWXCFNJLBQXVLHIQNIBZSDLTTRERHNWCMLJCVBBGGAQTPUQHIRABXPQSYGSDVMBNNDFG
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LVHAMSNXJOCVRPVGJUWXFVOCUCLCZDXRPBBDRLRAVVNLOZWOHWMXYSNMXAKJYWYGILNGUJGIPKAUDVANZLFWKUWWUSQYBRCBVDIJ
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SOAIQNALXRBSGAQIDQVMVDKVZCPMJNXKXRXPFZAUVQPBHHQKTPDSQROLQTUGMFQRWGVEWCYPDYDZGNNNUFKJUEHJKPLIQNRQYXHU
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YNSDSWDRLBBFUFVVICMGUCGBSVDLJNXGKXNFGVLKAVBJRRRUHKRXTPBJAKIEBAVMDIOJLIUDABCGNPNJIYBCXMOOWKRPHPYSWRDC
BORWTNBISSLTVKBRTLWKRNCEDCNEGCIYJIPDICFAVNOISYAHWBLGMNFKXZYTTWJOBEPNMSJEJMHXVPGOJOLQQQVXFGEULANQIAOD
OQETOJHCZXGTUKIWGMEVVMXCURISUOFQSAWZWDMZWVYHZMPEIMWKJDGERODVVUXYRTYLCRGYQQOIOFZSSZRAIESWBQOAIQNALJNR
HEYWHPLLPCUEOCBAOWGAYEJZQJHLVNMVQNSQQGGUBOIMDPFLOVSQGBLYAMBRYJDVOXOQINLJAVYALAKHPKOYNKGXIISSJNGKHYMS
IQVRYKXCUFIRNENEXFJTMOTJWYXSMTDHHPRHWIXETWVVIXZELKLLWRWQYGBCGJNYSUQEFCOUDNIJMLJNLAWSYJGULKBCFPYVSSMW
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PDOFSCKKJJTRYRWGLEZODQTJSIMXIAOLNMLPHBAYLPTTLPYWILSEIIQVSXNHIJEORVCNJHYXRBIZZJTADGMRTSXVRXYGVQQNUEIC
IHNJOQXUXTXFPALCHOELNVMWDWQTEARUKPIFWXJSMWZLMNLAODUTKNZDYRFRLGBLIBGIBXJBOYMLYLANQIAORORYKSJPOOOAMVRN
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GXOYXQFEBFIEJJLHBNGSYALOUXNQBXXZAAZJXENJJVVGFVHOTKSLEGLJVSJCQHSSZFEIOGBOGWSPIRENQAAWRQFBEFEXBKGMSTRC
PYIANSGMNKBCDPHWDUPKICQEUDNZPNGRUJYSZIRLXGXXITAFBCANGDLVAQLDPVTJNSAUZMBBNOBBOERSHQIOLBVTSPPJKVCMXUBS
IKMDIYSNCJZKJKJQMTIKEPRUNAHJUSWJHSLWIVWHYAYLOIOGSZVWKQWXZDBPHWZRAIPMXDJHBIISVJWVEVZAEGAKCYYMNZARBZPC
DLDFVQDFDMVHYVOWEKMFKWUXLTPWIVKPRZZXOLMDAPAIQEKJHCHYAGJDBOFWDGNEGQGOOKWSKLTLREMGGTVJFHAIBCQKNZVRCZYS
FBQASGNCCBBGNKJHCDBTGBIIWKMPHDABKEWDEPYEAVKNMPATUZZUOEHGUGAZNECSGUCIIJPMMRAMTVADMTCRJCBWDLWWFNFOWMVZ
XFJFBGDAVGGAIZHAUIYENDZTRUWHPQUFWCHOXNCWYNAWVPLBLNQKQDTKQQKXNFXCTBGRWUZFHNRBDNLNKQVOLLGBBJQIYOBCEIKO
CURAGWXMLYBSIZLAXFONZZMQMRNNSRQKRHQGFGZUTLONAYRKSSOWAMKZBSGOOYQDPTBHGPBNQEDCZHRTOXREOFJEKJVIZXZBCJPN
KGYBZTZRKOGBETJRUWRNUCIFKIMCZGYTZLCZYGCGKVZRJIFZQIQPTCPPUHYWIXBOFFGSGSAIMNGKKUUROAVNJUQQNSWJRZIZEHAF
DDAOBVCPOVODVJFLSNPJXHWQBHILWZAHQQMTQASNADZLZNXJLJMFCOUWOZJCMVVTYCKTUBABWLCEBNYWAMOLNBQQYBRUJCQCZALE
TVVRPMYFIKINHIUEJBDLTCUMMUWICIUVCZNIQIUEWVAHLANQIAONMEYJWPDAFXVNOSOFDOCESSLGZPTJINBUAFWWWMPTYALZIGVD
DCZGKILMBFXIQQFEKJBIUDEMIFCANVGNYZAYSQFMNNQFEPZFUUVGTBKSMDXITBLANQIAOQUKTPNYPOWSQQYWWMJHSDYVFDJYXBAF
VGYXAMDRRZWVIHNQPZZWRNWBTROOJOLNUGXBILZKQEGIQSYGKZGODPWBJSCMRRWSSQURUFIAFQGEZLGZNOEQMNQEYUKPEQPPVAMO
SYSFUAJFKIPUJVQSZRWQCJYAUMLDDNOKODDXIEQIFLANQIAOZFUNKUBVDBLMJOAUTVCZVLKJRQIORQPGAVCEYVNYUZHXILHERYEC
GJEKWEKIJNIWUXZNVIWIAANHIOSOLATSQFSSCTAKESUTSPPYFHEHLVLIBJZEEBCOWMNHFTZMAPKFUPNFLTFFJQRVJHAKDVMGGUIX
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CPQKJRBLYDNPUGHCRBVYBAIRVCAWLBWVWCMKNBIRKJOUGYQEBQRHDSTWXDIWGRVMLIJFBWHLHCDAAVUDLZSCGQNOUXVUIVIZZZMD
NMHGYPFUUDWKQGTAKKGCDFJFYJFNRZVXDPGZEAMWQVQZODKTXHIYFVKJSSAWVHYCUCZMLLBPXTILDYJQEMWDRUFKISOUVPUDTYPB
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请提交一个整数,不要填写任何多余的内容。

思路:能正确理解

    序列可以水平,垂直,或者是斜向;
并且走向不限(实际上就是有一共8种方向)。

代码:

     

#include<iostream>
using namespace std;
char c[10]={'L','A','N','Q','I','A','O'};
int dir[8][2]={1,0,0,1,-1,0,0,-1,1,1,1,-1,-1,1,-1,-1}; 
char map[105][105];
int cnt=0;
void dfs(int x,int y,int step,int k)
{
	if(step==7)
	{
		cnt++;
		return ;
	}
	int xx=x+dir[k][0];
	int yy=y+dir[k][1];
	if(xx<0||yy<0||xx>=100||yy>=100) return;
	if(map[xx][yy]==c[step])
	{
		dfs(xx,yy,step+1,k);
	}
}
int main()
{
	for(int i=0;i<100;i++)
	for(int j=0;j<100;j++)
	{
		cin>>map[i][j];
	}
	for(int i=0;i<100;i++)
	for(int j=0;j<100;j++)
	{
		if(map[i][j]=='L')
		{
			for(int k=0;k<8;k++)
			{
				dfs(i,j,1,k);
			} 
		}
	}
	cout<<cnt<<endl;
} 

 

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转载自blog.csdn.net/daoshen1314/article/details/88608978
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