Cod sursa(job #497151)

Utilizator ZethpixZethpix Zethpix Data 1 noiembrie 2010 19:18:52
Problema Abc2 Scor 0
Compilator cpp Status done
Runda Arhiva de probleme Marime 1.04 kb
#include <stdio.h>
#include <string.h>

int nr,sol,M,i,m,n,pow;
char str[10000005],s[25];

struct hash
{
	int nod;
	hash *link;
}*H[1000000];

void add(int x)
{
	hash *p;
	p=new hash;
	p->nod=x;
	p->link=H[x%M];
	H[x%M]=p;
}

int src(int x)
{
	hash *p;
	p=H[x%M];
	while(p!=NULL)
	{
		if(p->nod==x) return 1;
		p=p->link;
	}

	return 0;
}

int main()
{
	freopen("abc2.in","r",stdin);
	freopen("abc2.out","w",stdout);

	fgets(str,10000005,stdin);
	M=999983;
	while(!feof(stdin))
	{
		fgets(s,25,stdin);
		if(n==0)
		{
			n=strlen(s)-1;
			if(s[n]=='\n') n--;
		}
		if(!feof(stdin))
		{
			sol=0;
			for(i=0;i<=n;i++)
				sol=((sol*4)%M+s[i]-'a')%M;
			if(src(sol)==0) add(sol);
		}
	}
	sol=0;
	nr=0;
	for(i=0;i<=n;i++)
		sol=((sol*4)%M+str[i]-'a')%M;
	if(src(sol)) nr++;

	m=strlen(str)-1;
	if(str[m]=='\n') m--;
	for(i=1;i<=n;i++)
		pow=(pow*4)%M;
	for(i=n+1;i<=m;i++)
	{
		sol=((sol+M-(pow*(str[i-n-1]-'a'))%M)%M+str[i]-'a')%M;
		if(src(sol)) nr++;
	}
	printf("%d\n",nr);

	return 0;
}