Trie struct node int next26 int fail int

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Trie�

Trie�

代��� struct node { int next[26]; int fail; int count; void init() { memset(next,

代��� struct node { int next[26]; int fail; int count; void init() { memset(next, -1, sizeof(next)); fail = 0; count = 0; } }s[500005];

void make_fail() { qin = qout = 0; int i, ind_f; for(i = 0;

void make_fail() { qin = qout = 0; int i, ind_f; for(i = 0; i < 26; i++) { if(s[0]. next[i] != -1) { q[qin++] = s[0]. next[i]; } } while(qin != qout) { ind = q[qout++]; for(i = 0; i < 26; i++) { //找之后的子�点 if(s[ind]. next[i] != -1) { q[qin++] = s[ind]. next[i]; ind_f = s[ind]. fail; while(ind_f > 0 && s[ind_f]. next[i] == -1) ind_f = s[ind_f]. fail; if(s[ind_f]. next[i] != -1) ind_f = s[ind_f]. next[i]; s[s[ind]. next[i]]. fail = ind_f; //子�点的 fail根据父�点 fail指�的搞定 } } }

�目 Poj 1204 4052（�目在 4044上下�） Hdu 2222 3065

�目 Poj 1204 4052（�目在 4044上下�） Hdu 2222 3065

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