#include<bits/stdc++.h>
using namespace std;
//#include<ext/pb_ds/assoc_container.hpp>
//#include<ext/pb_ds/tree_policy.hpp>
//
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("-O3")
#pragma GCC optimize("no-stack-protector")
#pragma GCC optimize("fast-math")
//#define LOCAL
#define sim template < class c
#define ris return * this
#define dor > debug & operator <<
#define eni(x) sim > typename \
enable_if<sizeof dud<c>(0) x 1, debug&>::type operator<<(c i) {
sim > struct rge { c b, e; };
sim > rge<c> range(c i, c j) { return rge<c>{i, j}; }
sim > auto dud(c* x) -> decltype(cout<< *x, 0);
sim > char dud(...);
struct debug {
#ifndef LOCAL
~debug() { cout << endl; }
eni(!=) cout << boolalpha << i; ris; }
eni(==) ris << range(begin(i), end(i)); }
sim, class b dor(pair < b, c > d) {
ris << "(" << d.first << ", " << d.second << ")";
}
sim dor(rge<c> d) {
*this << "[";
for (auto it = d.b; it != d.e; ++it)
*this << ", " + 2 * (it == d.b) << *it;
ris << "]";
}
#else
sim dor(const c&) { ris; }
#endif
};
#define imie(...) " [" << #__VA_ARGS__ ": " << (__VA_ARGS__) << "] "
#define fi first
#define f first
#define se second
#define s second
#define vi_a vector<int>a;
#define p_b push_back
////////////////////////////////???????????????CHECK THIS OUT???????????????//////////////////////////////
#define ll long long
////////////////////////////////???????????????CHECK THIS OUT???????????????//////////////////////////////
#define ld long double
#define pll pair<ll,ll>
#define pii pair<int,int>
#define m_p make_pair
#define fast_io cin.tie(0);cout.tie(0);ios_base::sync_with_stdio(0);
#define all(x) x.begin(),x.end()
#define getfiles ifstream cin("input.txt");ofstream cout("output.txt");
#define pw(x) (1ll << x)
#define sz(x) (ll)x.size()
#define rall(x) x.rbegin(),x.rend()
#define len(a) (ll)a.size()
#define rep(x,l,r) for(ll x=l;x<r;x++)
//using namespace __gnu_pbds;
ld eps = (ld)1 / 1e6;
const ld pi=3.14159265359;
ll inf = 1e18,mod1=1e9+7;
ll sqr(ll a) { return a * a; }
ll qb(ll a) { return a * a * a; }
ll gcd(ll a, ll b) { return !a ? b : gcd(b % a, a); }
ll binpow(ll a, ll b, ll mod) { return b ? (b % 2 ? (a * (sqr(binpow(a, b / 2, mod)) % mod)) % mod : sqr(binpow(a, b / 2, mod)) % mod) : 1; }
ll binmult(ll a, ll b, ll mod) { return b ? (b % 2 ? (2 * binmult(a, b / 2, mod) + a) % mod : (2 * binmult(a, b / 2, mod)) % mod) : 0; }
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
const ll R=1e4;
const ll tx[4]={0,0,-1,1};
const ll ty[4]={-1,1,0,0};
const char rev_to[4]={'E','W','N','S'};
const int N=3e6+1;
const int M=1e9+7;
int n;
string a[N];
unordered_map<string,ll>dp,mp;unordered_map<string,bool>used,is;
ll go(string &cur){
if(!sz(cur)) return dp[cur];
if(used[cur]) return dp[cur];
string nxt=cur;
nxt.pop_back();
if(is[nxt]){
dp[cur]=go(nxt)+mp[nxt];
}
else{
dp[cur]=mp[nxt];
}
used[cur]=1;
return dp[cur];
}
signed main(){
fast_io;
cin>>n;
for(int i=0;i<n;i++){
cin>>a[i];
reverse(all(a[i]));
}
for(int i=0;i<n;i++){
char to=a[i].back();
a[i].pop_back();
mp[a[i]]++;
a[i]+=to;
is[a[i]]=1;
}
for(int i=0;i<n;i++) go(a[i]);
ll ans=0;
for(auto &z : dp) ans=max(ans,z.s);
cout<<ans;
return 0;
}
///stuff you should look for :
/*
* int overflow, array bounds
* special cases (n=1?)
* do smth instead of nothing and stay organized
* read the conditions carefully
* WRITE STUFF DOWN
*/
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
56 ms |
94328 KB |
Output is correct |
| 2 |
Correct |
58 ms |
94328 KB |
Output is correct |
| 3 |
Correct |
58 ms |
94328 KB |
Output is correct |
| 4 |
Execution timed out |
1110 ms |
195716 KB |
Time limit exceeded |
| 5 |
Correct |
87 ms |
109432 KB |
Output is correct |
| 6 |
Incorrect |
71 ms |
98024 KB |
Output isn't correct |
| 7 |
Incorrect |
63 ms |
97524 KB |
Output isn't correct |
| 8 |
Incorrect |
64 ms |
97268 KB |
Output isn't correct |
| 9 |
Incorrect |
121 ms |
112556 KB |
Output isn't correct |
| 10 |
Incorrect |
63 ms |
97276 KB |
Output isn't correct |
