C_Competitive_Programming/Number_Theory_someone.cpp at master · phumipatc/C_Competitive_Programming · GitHub

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#include<bits/stdc++.h>
using namespace std;
int p[15][200005],coun;
int ans[14][200005];
int a[200005];
int b[200005];
int c[15][200005];
int num[15];
int main()
{
    int n,m,i,j,k,d=0,ch;
    scanf("%d %d",&n,&m);
    for(i=1;i<=n;i++)
        scanf("%d",&a[i]);
    for(i=1;i<=m;i++)
        scanf("%d",&b[i]);
    for(i=1,j=1;i<=m;i++,j++)
    {
        if(b[i]==1)
        {
            j=0;
            coun++;
            continue ;
        }
        c[coun][j]=b[i];
        num[coun]++;
    }
    for(j=0;j<=coun;j++)
    {
        k=0;
        for(i=2;i<=num[j];i++)
        {
            while(k&&c[j][k+1]!=c[j][i])
                k=p[j][k];
            if(c[j][k+1]==c[j][i])
                k++;
            p[j][i]=k;
            //printf("%d ",c[j][i]);
        }
        //printf("\n");
    }
    for(j=0;j<=coun;j++)
    {
        k=0;
        for(i=1;i<=n;i++)
        {
            while(k&&a[i]!=c[j][k+1])
                k=p[j][k];
            if(a[i]==c[j][k+1])
                k++;
            ans[j][i]=k==num[j];
            //printf("%d ",ans[j][i]);
        }
        //printf("\n");
    }
    for(i=1;i<=coun;i++){
        num[i]+=num[i-1]+1;
    }
    for(i=1;i+m-1<=n;i++)
    {
        ch=1;
        for(j=0;j<=coun;j++)
            if(ans[j][i+num[j]-1]==0)
                ch=0;
        d+=ch;
        //printf(">>%d %d\n",coun,d);
    }
    printf("%d",d);
    return 0;
}