Cod sursa(job #1481798)

Utilizator SilviuIIon Silviu SilviuI Data 5 septembrie 2015 11:57:57
Problema Abc2 Scor 0
Compilator cpp Status done
Runda Arhiva de probleme Marime 1.86 kb
#include <stdio.h>
#include <cstring>
#include <vector>
#define lmax 10000010
#define buffersize 1000005
using namespace std;
struct trie { vector <int> y; int x; trie *t[4],*fail;
       trie() {
           x=0; fail=NULL;
           for (int i=0;i<4;i++) t[i]=NULL;
       }
};
int n,i,j,pr,ul,m,sol[50010],soll=0;
char s[lmax],ss[buffersize+5];
trie *root,*a,*q[lmax];
bool ok;
inline int min(int a,int b) { if (a<b) return a; else return b; }
void add_intrie()
{
    trie* a=root; n++;
    while (ss[i]>='a' && ss[i]<='c' && a->t[ss[i]-97]!=NULL) a=a->t[ss[i]-97],i++;
    for (;ss[i]>='a' && ss[i]<='c';i++) {
        a->t[ss[i]-97]=new trie; a=a->t[ss[i]-97];
    }
    a->y.push_back(n);
    if (ss[i+1]>='a' && ss[i+1]<='c') i++,add_intrie();
}
void bfs(trie *a)
{
    trie *dolar;
    a->fail=a; pr=1; ul=1; q[pr]=a;
    for (;pr<=ul;pr++) {
        trie *fr=q[pr];
        for (int i=0;i<=3;i++)
           if (fr->t[i]!=NULL) {
             for (dolar=fr->fail;dolar!=a && dolar->t[i]==NULL;) dolar=dolar->fail;
             if (dolar->t[i]!=NULL && dolar->t[i]!=fr->t[i]) dolar=dolar->t[i];
             fr->t[i]->fail=dolar;
             ul++; q[ul]=fr->t[i];
        }
    }
    a->fail=NULL;
}
void antibfs(trie *a)
{
    for (int i=ul;i>=1;i--) {
        trie *fr=q[i];
        if (fr->fail!=NULL) fr->fail->x+=fr->x;
        for (unsigned int j=0;j<min(fr->y.size(),1);j++) sol[fr->y[j]]=fr->x;
    }
}
int main() {
freopen("abc2.in","r",stdin);
freopen("abc2.out","w",stdout);
ok=true;
gets(s+1); n=0; root=new trie;
fread(ss,1,buffersize,stdin); i=0; add_intrie();
bfs(root); a=root; m=strlen(s+1);
for (i=1;i<=m;i++) {
    for (;a!=root && a->t[s[i]-97]==NULL;) a=a->fail;
    if (a->t[s[i]-97]!=NULL) a=a->t[s[i]-97];
    a->x++;
}
antibfs(root);
for (i=1;i<=n;i++) soll=soll+sol[i];
printf("%d",soll);
return 0;
}