Pagini recente » Cod sursa (job #619222) | Cod sursa (job #1048473) | Cod sursa (job #908922) | Cod sursa (job #2800727) | Cod sursa (job #2447941)
#include <bits/stdc++.h>
using namespace std;
const int L_MAX = 1000002;
const int N_MAX = 102;
const int BUFFER_SIZE = 4095;
FILE* file = fopen("ahocorasick.in", "r");
ofstream fout ("ahocorasick.out");
char buffer[BUFFER_SIZE];
int pos = -1;
void read_buffer ()
{
fread(buffer, sizeof(char), BUFFER_SIZE, file);
}
char read ()
{
pos++;
if(pos >= BUFFER_SIZE)
{
read_buffer();
pos = 0;
}
return buffer[pos];
}
void read_int (int &x)
{
char c;
while(iswspace(c = read()));
x = 0;
while(isdigit(c))
{
x = x * 10 + c - '0';
c = read();
}
}
void read_str (char *str)
{
char c;
while(iswspace(c = read()));
string s = "";
while(c >= 'a' && c <= 'z')
{
s += c;
c = read();
}
strcpy(str, s.c_str());
}
struct Trie
{
vector <int> indexes;
int ap;
Trie* sons[26];
Trie* maxPref;
Trie* maxW;
int apSubstr;
Trie ()
{
indexes.clear();
for(int i = 0; i < 26; i++)
sons[i] = NULL;
ap = 0;
maxPref = NULL;
maxW = NULL;
apSubstr = 0;
}
};
Trie* Root = new Trie();
void trieInsert (Trie* root, char* str, int index)
{
if(str[0] == '\0')
{
root->ap++;
root->indexes.push_back(index);
}
else
{
if(root->sons[str[0] - 'a'] == NULL)
root->sons[str[0] - 'a'] = new Trie();
trieInsert(root->sons[str[0] - 'a'], str + 1, index);
}
}
char a[L_MAX];
int n;
char w[N_MAX][L_MAX];
queue <Trie*> q;
vector <Trie*> order;
void bfs ()
{
Root->maxPref = Root->maxW = Root;
q.push(Root);
while(!q.empty())
{
Trie* root = q.front();
order.push_back(root);
q.pop();
for(int i = 0; i < 26; i++)
if(root->sons[i] != NULL)
{
root->sons[i]->maxPref = root->maxPref;
while(root->sons[i]->maxPref != Root && root->sons[i]->maxPref->sons[i] == NULL)
root->sons[i]->maxPref = root->sons[i]->maxPref->maxPref;
if(root->sons[i]->maxPref->sons[i] != NULL && root != Root)
root->sons[i]->maxPref = root->sons[i]->maxPref->sons[i];
root->sons[i]->maxW = root->sons[i]->maxPref;
if(root->sons[i]->maxW->ap == 0)
root->sons[i]->maxW = root->sons[i]->maxW->maxW;
q.push(root->sons[i]);
}
}
}
int answer[L_MAX];
void getFreq ()
{
Trie* p = Root;
int lga = strlen(a);
for(int i = 0; i < lga; i++)
{
while(p != Root && p->sons[a[i] - 'a'] == NULL)
p = p->maxPref;
if(p->sons[a[i] - 'a'] != NULL)
p = p->sons[a[i] - 'a'];
p->apSubstr++;
}
}
void getAnswer (Trie* node, string s = "")
{
reverse(order.begin(), order.end());
for(Trie* node : order)
{
node->maxPref->apSubstr += node->apSubstr;
for(int i : node->indexes)
answer[i] = node->apSubstr;
}
}
int main()
{
read_buffer();
read_str(a);
read_int(n);
for(int i = 1; i <= n; i++)
{
read_str(w[i]);
trieInsert(Root, w[i], i);
}
bfs();
getFreq();
getAnswer(Root);
for(int i = 1; i <= n; i++)
fout << answer[i] << "\n";
return 0;
}