#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
#define rng(i,c,n) for(int i=c;i<n;i++)
#define per(i,n) for(int i=n-1;i>=0;i--)
#define fi first
#define se second
#define pb push_back
#define sz(a) (int)a.size()
#define vec(...) vector<__VA_ARGS__>
#define _3phCa4T ios::sync_with_stdio(0),cin.tie(0)
typedef long long ll;
using pii=pair<int,int>;
using vi=vector<int>;
void print(){cout<<'\n';}
template<class h,class...t>
void print(const h&v,const t&...u){cout<<v<<' ',print(u...);}
// e
//snuke's mod int
template <ll mod>
struct modint{
ll x; // typedef long long ll;
modint(ll x=0):x((x%mod+mod)%mod){}
modint operator-()const{return modint(-x);}
modint& operator+=(const modint a){if((x+=a.x)>=mod) x-=mod; return *this;}
modint& operator-=(const modint a){if((x+=mod-a.x)>=mod) x-=mod; return *this;}
modint& operator*=(const modint a){(x*=a.x)%=mod; return *this;}
modint operator+(const modint a)const{modint res(*this); return res+=a;}
modint operator-(const modint a)const{modint res(*this); return res-=a;}
modint operator*(const modint a)const{modint res(*this); return res*=a;}
modint pow(ll n)const{
modint res=1,x(*this);
while(n){
if(n&1)res*=x;
x*=x;
n>>=1;
}
return res;
}
modint inv()const{return pow(mod-2);}
};
using mint=modint<998244353>;
// include mint here
using hshmint=modint<1000000007>;
using hshmint1=modint<998244353>;
using magicpair=pair<hshmint,hshmint1>;
struct rollhsh{
hshmint _p=9973; // base
hshmint1 _p1=257; // base1
vec(hshmint) pw,invpw;
vec(hshmint1) pw1,invpw1;
vec(magicpair) hsh;
rollhsh(string s=""){
init(s);
}
void init(string s){
// put this out in global if multiple testcases
hsh.clear();
pw.clear();
invpw.clear();
pw1.clear();
invpw1.clear();
hsh.resize(sz(s)+1);
pw.resize(sz(s)+1);
invpw.resize(sz(s)+1);
pw1.resize(sz(s)+1);
invpw1.resize(sz(s)+1);
hsh[0]={1,1};
pw[0]=1;
pw1[0]=1;
invpw[0]=1;
invpw1[0]=1;
hshmint _invbase=_p.x;
hshmint1 _invbase1=_p1.x;
_invbase=_invbase.inv(); _invbase1=_invbase1.inv();
rep(i,sz(s)){
pw[i+1]=pw[i]*_p;
pw1[i+1]=pw1[i]*_p1;
invpw[i+1]=invpw[i]*_invbase;
invpw1[i+1]=invpw1[i]*_invbase1;
hshmint x=(int)(s[i]-'a'+1);
hshmint1 x1=(int)(s[i]-'a'+1);
hsh[i+1]={hsh[i].fi+pw[i]*x,hsh[i].se+pw1[i]*x1};
}
}
pair<ll,ll> get(int l,int r){
// from - to , inclusive
hshmint _f=invpw[l]*(hsh[r+1].fi-hsh[l].fi);
hshmint1 _s=invpw1[l]*(hsh[r+1].se-hsh[l].se);
return {_f.x,_s.x};
}
};
signed main(){
_3phCa4T;
int n;
cin>>n;
vec(string) a;
rep(i,n){
string s;
cin>>s;
a.pb(s);
}
sort(a.begin(), a.end(),[&](const string&l,const string&r){
return sz(l)>sz(r);
});
using pll=pair<ll,ll>;
std::map<pll,int> dp,cnt;
rollhsh hsh;
rep(i,n){
hsh.init(a[i]);
pll p=hsh.get(1,sz(a[i])-1);
cnt[p]+=1;
}
rep(i,n){
hsh.init(a[i]);
pll p=hsh.get(1,sz(a[i])-1);
pll q=hsh.get(0,sz(a[i])-1);
dp[p]=max(dp[p],dp[q]+cnt[p]);
}
int res=0;
for(auto p:dp)res=max(res,p.se);
print(res);
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
0 ms |
340 KB |
Output is correct |
| 3 |
Correct |
0 ms |
212 KB |
Output is correct |
| 4 |
Execution timed out |
1092 ms |
59308 KB |
Time limit exceeded |
| 5 |
Correct |
91 ms |
3636 KB |
Output is correct |
| 6 |
Incorrect |
30 ms |
15444 KB |
Output isn't correct |
| 7 |
Incorrect |
26 ms |
15304 KB |
Output isn't correct |
| 8 |
Incorrect |
24 ms |
15248 KB |
Output isn't correct |
| 9 |
Incorrect |
132 ms |
19268 KB |
Output isn't correct |
| 10 |
Incorrect |
23 ms |
15284 KB |
Output isn't correct |
