Submission #282166

#	Time	Username	Problem	Language	Result	Execution time	Memory
282166		Fischer	Rima (COCI17_rima)	C++14	56 / 140	1018 ms	65324 KiB

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>
#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];

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();
      });
      map<pair<ll, int>, int> memo;
      map<pair<ll, int>, int> cnt;
      int res = 0;
      re(i, 0, n) {
        reverse(all(s[i]));
        ll hash = 0;
        re(j, 0, sz(s[i]) - 1) {
          hash = hash * 257 + s[i][j];
        }
        cnt[{hash, sz(s[i])}] += 1;
      }
      re(i, 0, n) {
        ll hash = 0;
        re(j, 0, sz(s[i]) - 1) {
          hash = hash * 257 + s[i][j];
        }
        int ans = cnt[{hash, sz(s[i])}] + memo[{hash * 257 + s[i][sz(s[i]) - 1], sz(s[i]) + 1}];
        res = max(res, ans);
        memo[{hash, sz(s[i])}] = max(memo[{hash, sz(s[i])}], 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 / 140