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KMP 3.cpp
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KMP 3.cpp
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string p, t;
int pi[MAX], cnt[MAX];
void prefixFun()
{
int now;
pi[0]=now=-1;
for(int i=1; i<p.size(); i++)
{
while(now!=-1 && p[now+1]!=p[i])
now=pi[now];
if(p[now+1]==p[i]) pi[i]=++now;
else pi[i]=now=-1;
}
}
int kmpMatch()
{
int now=-1;
FOR(i,0,t.size())
{
cout<<"now: "<<i<<" "<<now<<endl;
while(now!=-1 && p[now+1]!=t[i])
now=pi[now];
if(p[now+1]==t[i])
{
++now;
cnt[now]++;
}
else now=-1;
if(now+1==p.size())
{
// match found
// cout<<"match and setting "<<now<<" to "<<pi[now]<<endl;
now=pi[now]; // match again
}
}
}
int main()
{
// ios_base::sync_with_stdio(0);
// cin.tie(NULL); cout.tie(NULL);
// freopen("in.txt","r",stdin);
cin>>t>>p;
prefixFun();
FOR(i,0,p.size()) cout<<pi[i]<<" "; cout<<endl;
prnt(kmpMatch());
FOR(i,0,p.size()) cout<<cnt[i]<<" "; cout<<endl;
FORr(i,p.size()-1,0)
{
if(pi[i]==-1) continue;
cnt[pi[i]]+=cnt[i];
}
FOR(i,0,p.size()) cout<<cnt[i]<<" "; cout<<endl;
return 0;
}