病毒侵襲持續中 HDU 3065

2021-09-25 08:23:08 字數 1023 閱讀 6475

統計模式串出現次數。

#include #include #include #include #include #include #include #include using namespace std;


typedef long long ll;


const int maxn =  5e4+10;


int trie[maxn][128]; //字典樹


int cntword[maxn];  //記錄該單詞出現次數


int fail[maxn];     //失敗時的回溯指標


int cnt = 0;


int id[maxn];


int ansid[1001]; 


struct node  no[1001];


void insertwords(char s,int len,int index) 


}//fail[now]    ->當前節點now的失敗指標指向的地方


tire[now][i] -> 下乙個字母為i+'a'的節點的下標為tire[now][i]


while(!q.empty())  else //否則就讓當前節點的這個子節點


//指向當前節點fail指標的這個子節點


trie[now][i] = trie[fail[now]][i];


}	}}void query(char s,int len) 	}}


char s[2000100];


int main() 


fail[0] = 0;


getfail();


scanf("%s",s);//查詢文字串


query(s,strlen(s));


for(int i=1; i<=n; i++) 


}	}return 0;}/*


8...cc


aabb%c


oooxxcc%daaaaoen....end3aa


bbcc


ooxxcc%daaaoen....end


*/

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