kmp模板

#include<iostream> #include<cstring> #define MAXN 1000010 using namespace std; int kmp[MAXN]; int la,lb,j; char a[MAXN],b[MAXN]; int main() { cin>>a+1; cin>>b+1; la=strlen(a+1); lb=strlen(b+1); for (int i=2;i<=lb;i++) { while(j&&b[i]!=b[j+1]) j=kmp[j]; if(b[j+1]==b[i])j++; kmp[i]=j; } j=0; for(int i=1;i<=la;i++) { while(j>0&&b[j+1]!=a[i]) j=kmp[j]; if (b[j+1]==a[i]) j++; if (j==lb) {cout<<i-lb+1<<endl;j=kmp[j];} } for (int i=1;i<=lb;i++) cout<<kmp[i]<<" "; return 0; }