51nod1440 邁克打電話
阿新 • • 發佈:2018-12-31
題目
和阿狸的打字機很像,差不多的套路
#include<bits/stdc++.h>
using namespace std;
#define mid ((l+r)>>1)
const int N=200002,M=4000002;
struct node{
int to,ne;
}e[N];
int l1[N],r1[N],l[N],r[N],tr[N][26],sum,x,y,i,q[N],P,L[M],R[M],tot,cnt,tim,h[N],pos[N],fail[N],sm[M],le,ri,n,Q,rt[N],k;
char s[N];
#define gc getchar
inline int rd(){
int x=0,fl=1;char ch=gc();
for (;ch<48||ch>57;ch=gc())if(ch=='-')fl=-1;
for (;48<=ch&&ch<=57;ch=gc())x=(x<<3)+(x<<1)+(ch^48);
return x*fl;
}
inline void wri(int a){if(a>=10)wri(a/10);putchar(a%10|48);}
inline void wln(int a){if(a<0)a=-a,putchar('-' );wri(a),puts("");}
void add(int x,int y){
e[++tot]=(node){y,h[x]};
h[x]=tot;
}
void dfs(int u){
l1[u]=++tim;
for (int i=h[u];i;i=e[i].ne) dfs(e[i].to);
r1[u]=tim;
}
void ins(char *s){
int k=0;
for (int i=0;s[i];i++){
int &son=tr[k][s[i]-'a'];
if (!son) son=++sum;
k=son;
pos[++cnt]= k;
}
}
void build(){
int h=0,t=1;
while (h<t){
int u=q[h++];
for (int i=0;i<26;i++){
int &v=tr[u][i];
if (v){
if (u) fail[v]=tr[fail[u]][i];
q[t++]=v;
}else v=tr[fail[u]][i];
}
}
}
void update(int &rt,int pre,int l,int r){
rt=++tot,sm[rt]=sm[pre]+1;
if (l==r) return;
if (P<=mid) R[rt]=R[pre],update(L[rt],L[pre],l,mid);
else L[rt]=L[pre],update(R[rt],R[pre],mid+1,r);
}
int query(int l,int r,int x,int y){
if (le<=l && r<=ri) return sm[x]-sm[y];
int ans=0;
if (le<=mid) ans+=query(l,mid,L[x],L[y]);
if (mid<ri) ans+=query(mid+1,r,R[x],R[y]);
return ans;
}
int main(){
n=rd(),Q=rd();
for (i=1;i<=n;i++) scanf("%s",s),l[i]=cnt+1,ins(s),r[i]=cnt;
build();
for (i=1;i<=sum;i++) add(fail[i],i);
tot=0,dfs(0),sum++;
for (i=1;i<=cnt;i++) P=l1[pos[i]],update(rt[i],rt[i-1],1,sum);
for (;Q--;){
x=rd(),y=rd(),k=rd();
le=l1[pos[r[k]]],ri=r1[pos[r[k]]];
wln(query(1,sum,rt[r[y]],rt[l[x]-1]));
}
}