const int N = 1e6+5;
char s[N];
int n,a[N],t[N],x[N],y[N],SA[N],Rank[N],Height[N],ans;
bool cmp(int i,int j,int k){return y[i]==y[j]&&y[i+k]==y[j+k];}
void getSA()
{
    int m=30;
    for (int i=1;i<=n;++i) ++t[x[i]=a[i]];
    for (int i=1;i<=m;++i) t[i]+=t[i-1];
    for (int i=n;i>=1;--i) SA[t[x[i]]--]=i;
    for (int k=1;k<=n;k<<=1)
    {
        int p=0;
        for (int i=0;i<=m;++i) y[i]=0;
        for (int i=n-k+1;i<=n;++i) y[++p]=i;
        for (int i=1;i<=n;++i) if (SA[i]>k) y[++p]=SA[i]-k;
        for (int i=0;i<=m;++i) t[i]=0;
        for (int i=1;i<=n;++i) ++t[x[y[i]]];
        for (int i=1;i<=m;++i) t[i]+=t[i-1];
        for (int i=n;i>=1;--i) SA[t[x[y[i]]]--]=y[i];
        swap(x,y);
        x[SA[1]]=p=1;
        for (int i=2;i<=n;++i) x[SA[i]]=cmp(SA[i],SA[i-1],k)?p:++p;
        if (p>=n) break;m=p;
    }
    for (int i=1;i<=n;++i) Rank[SA[i]]=i;
    for (int i=1,j=0;i<=n;++i)
    {
        if (j) --j;
        while (a[i+j]==a[SA[Rank[i]-1]+j]) ++j;
        Height[Rank[i]]=j; 
    }
}