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Cod sursa(job #98424)
#include <cstdio>
#include <cstring>
#define H_SIZE 4789327
#define NR_H 4
int N, M, L, ret, at[NR_H], ok;
char A[10111111], cuv[50111][22];
unsigned short hash[NR_H][H_SIZE];
int base[NR_H] = { 101, 207, 413, 593 }, po[NR_H][22];
int main()
{
freopen("abc2.in", "r", stdin);
freopen("abc2.out", "w", stdout);
int i, j, l, k;
gets( A );
L = strlen( A );
while( gets( cuv[++N] ) );
--N;
if( N == 0 )
{
printf("0\n");
return 0;
}
M = strlen(cuv[1]);
if( M > L )
{
printf("0\n");
return 0;
}
for( l = 0; l < L; l++ ) A[l] -= 'a';
for( i = 1; i <= N; i++ )
for( l = 0; l < M; l++ ) cuv[i][l] -= 'a';
for( j = 0; j < NR_H; j++ )
{
po[j][0] = 1;
for( i = 1; i <= M; i++ )
po[j][i] = ( (long long)( po[j][i-1] ) * base[j] ) % H_SIZE;
}
for( i = 1; i <= N; i++ )
for( j = 0; j < NR_H; j++ )
{
int val = 0;
for( k = 0; k < M; k++ )
val += po[j][M-k-1] * (int)cuv[i][k],
val %= H_SIZE;
hash[ j ][ val ] = i;
}
for( l = 0; l < L; l++ )
{
for( j = 0; j < NR_H; j++ )
{
if( l < M ) at[j] += po[j][M-l-1] * (int)A[l], at[j] %= H_SIZE;
else
{
// printf("%d: %d %d %d %d\n", j, at[j], po[j][M-1], (int)A[l-M], (int)A[l] );
at[j] = ( base[j] * ( (at[j] - po[j][M-1] * (int)(A[ l - M ]) + 10 * H_SIZE ) % H_SIZE ) ) % H_SIZE + (int)(A[l]),
at[j] %= H_SIZE;
}
}
/*
printf("%d :\n", l );
for( i = 0; i < NR_H; ++i )
printf("%d ", at[i] ); printf("\n");
*/
if( l >= M - 1 )
{
ok = 1;
for( i = 0; ok && i < NR_H; i++ )
if( !hash[ i ][ at[i] ] || hash[ i ][ at[i] ] != hash[ 0 ][ at[0] ] )
ok = 0;
if( ok )
ret++;
}
}
printf("%d\n", ret);
return 0;
}