Mai intai trebuie sa te autentifici.
Cod sursa(job #1498514)
Utilizator | Data | 8 octombrie 2015 18:13:19 | |
---|---|---|---|
Problema | Abc2 | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 1.25 kb |
#include<fstream>
#include<string>
#include<vector>
using namespace std;
ifstream fin( "abc2.in" ); ofstream fout( "abc2.out" );
const int key = 666013;
unsigned int p3[ 21 ];
vector< unsigned int > h[ key ];
string s, cuv;
bool hash_search( unsigned int x ) {
unsigned int k = x % key;
for( vector< unsigned int >::iterator it = h[ k ].begin(); it != h[ k ].end(); ++ it ) {
if ( *it == x ) {
return 1;
}
}
return 0;
}
int main() {
int l;
fin >> s;
p3[ 0 ] = 1;
for( int i = 1; i < 20; ++ i ) {
p3[ i ] = p3[ i - 1 ] * 3;
}
while ( fin >> cuv ) {
unsigned int x = 0;
for( int i = 0; i < ( int )cuv.size(); ++ i ) {
x = (x * 3 + cuv[ i ] - 'a');
}
if ( hash_search( x ) == 0 ) {
h[ x % key ].push_back( x );
}
l = ( int )cuv.size();
}
unsigned int x = 0;
for( int i = 0; i < l - 1; ++ i ) {
x = (x * 3 + s[ i ] - 'a');
}
int ans = 0;
for( int i = l - 1; i < ( int )s.size(); ++ i ) {
x = (x * 3 + s[ i ] - 'a');
ans += hash_search( x );
x -= (p3[ l - 1 ] * (s[ i - l + 1 ] - 'a') );
}
fout << ans << "\n";
fin.close();
fout.close();
return 0;
}