답안 #282176

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
282176	2020-08-24T05:45:43 Z	Fischer	Rima (COCI17_rima)	C++14	56 / 140	690 ms	107876 KB

rima

/**
 * code generated by JHelper
 * More info: https://github.com/AlexeyDmitriev/JHelper
 * @author Miguel Mini
 */

#include <string>
#include <vector>
#include <algorithm>
#include <set>
#include <map>
#include <queue>
#include <iostream>
#include <sstream>
#include <cstdio>
#include <cmath>
#include <ctime>
#include <cstring>
#include <complex>
#include <climits>
#include <iomanip>
#include <numeric>
#include <functional>
#include <fstream>
#include <cassert>
#include <chrono>
#include <random>
#include <bitset>
#include <stack>
#include <unordered_map>
#define sz(x) (int)x.size()
#define trav(v, x) for (auto v : x)
#define re(x, y, z) for (int x=y; x<z; ++x)
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define set_to(x, v) fill(all(x), v)
#define eb emplace_back
#define lso(x) ((x)&-(x))
#define mset(m ,v) memset(m, v, sizeof(m))
using namespace std;
using ll = long long;
using ii = pair<int, int>;
using vi = vector<int>;
using vii = vector<ii>;
using si = set<int>;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

int random(int l, int r) {
  return uniform_int_distribution<int>(l, r)(rng);
}

const int mod = 1e9 + 7;

int add(int a, int b, int m=mod) {
    return a+b < m? a+b : a+b-m;
}

int mul(ll a, ll b, int m=mod) {
    return a*b%m;
}

int ex(int a, int b, int m=mod) {
    int r=1;
    while (b > 0) {
        if (b&1) r = mul(r, a, m);
        a = mul(a, a, m);
        b >>= 1;
    }
    return r;
}

const int inf = 1.2e9;
const int maxn = 5e5 + 10;
string s[maxn];
using ull = unsigned long long;
unordered_map<ull, int> memo[maxn];
unordered_map<ull, int> cnt[maxn];

class COCI17Rima {
public:
    void solveOne(istream& in, ostream& out) {
      int n;
      in >> n;
      re(i, 0, n) in >> s[i];
      sort(s, s+n, [](const string& p, const string& q) {
        return p.size() > q.size();
      });
      int res = 0;
      re(i, 0, n) {
        reverse(all(s[i]));
        ull hash = 0;
        re(j, 0, sz(s[i]) - 1) {
          hash = ((hash<<17) + hash + s[i][j])%mod;
        }
        cnt[sz(s[i])][hash] += 1;
      }
      re(i, 0, n) {
        ll hash = 0;
        re(j, 0, sz(s[i]) - 1) {
          hash = ((hash<<17) + hash  + s[i][j])%mod;
        }
        int len = sz(s[i]);
        int ans = cnt[len][hash] + memo[len+1][((hash<<17) + hash + s[i][len - 1])%mod];
        res = max(res, ans);
        memo[len][hash] = max(memo[len][hash], ans);
      }
      out << res << endl;
    }

    void solve(istream& in, ostream& out) {
        out.precision(10);
        out << fixed;
        int testNumber = 1;
        //in >> testNumber;
        re(tc, 1, testNumber+1) {
            //out << "Case #" << tc << ": ";
            solveOne(in, out);
        }
    }
};


int main() {
    //freopen("in", "r", stdin);
    //freopen("out", "w", stdout);
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    COCI17Rima solver;
    std::istream& in(std::cin);
    std::ostream& out(std::cout);
    solver.solve(in, out);
    return 0;
}

Subtask #1

56.0 / 140.0

#	결과	실행 시간	메모리	Grader output
1	Correct	53 ms	70776 KB	Output is correct
2	Correct	48 ms	70812 KB	Output is correct
3	Correct	48 ms	70776 KB	Output is correct
4	Incorrect	690 ms	107876 KB	Output isn't correct
5	Correct	84 ms	74232 KB	Output is correct
6	Incorrect	56 ms	71696 KB	Output isn't correct
7	Incorrect	55 ms	71452 KB	Output isn't correct
8	Incorrect	53 ms	71272 KB	Output isn't correct
9	Incorrect	96 ms	75092 KB	Output isn't correct
10	Incorrect	53 ms	71492 KB	Output isn't correct