Submission #113848

#	Time	Username	Problem	Language	Result	Execution time	Memory
113848		Frankenween	Savez (COCI15_savez)	C++17	0 / 120	104 ms	53696 KiB

savez

#ifdef LOCAL
#define _GLIBCXX_DEBUG
#endif
#include <bits/stdc++.h>

#define ull unsigned long long
#define pll pair<ll, ll>
#define mp make_pair
#define ll long long
#define pb push_back
#define deb(x) cout << #x << " = " << x << endl
#define all(x) x.begin(), x.end()
#define ld long double
const ll mod1 = (ll)1e9 + 7;
const ll mod2 = (ll)1e9 + 9;
const ll BASE = 47;
const ll inf = (ll)1e18;
const long double e = 2.718281828459;
const long double pi = 3.141592653;
const ld EPS = 1e-9;


using namespace std;


template <class T>
istream& operator>>(istream &in, vector<T> &arr) {
    for (T &cnt : arr) {
        in >> cnt;
    }
    return in;
};


void solve() {
    ll n;
    cin >> n;
    vector<string> arr(n);
    cin >> arr;
    ll LEN = 2000000 + 1;
    vector<ll> p1(LEN);
    p1[0] = 1;
    for (int i = 1; i < LEN; i++) {
        p1[i] = (p1[i - 1] * BASE) % mod1;
    }
    vector<vector<ll>> hash1(n);
    for (int i = 0 ; i < n; i++) {
        hash1[i].resize(arr[i].size() + 1);
        ll h1 = 0;
        ll j = 1;
        for (auto c : arr[i]) {
            h1 = (h1 * BASE + c - 'A' + 1) % mod1;
            hash1[i][j] = h1;
            j++;
        }
        arr[i].clear();
    }
    map<ll, ll> dp;
    ll answer = 0;
    for (int i = 0; i < n; i++) {
        ll mx = 0;
        ll len = 1;
        while (len <= arr[i].size()) {
            ll h1 = (hash1[i].back() - hash1[i][arr[i].size() - len] * p1[len]) % mod1;
            if (h1 < 0) {
                h1 += mod1;
            }
            if (h1 == hash1[i][len] and dp.count(h1) != 0) {
                mx = max(mx, dp[h1]);
            }
            len++;
        }
        dp[hash1[i].back()] = mx + 1;
        answer = max(answer, mx + 1);
    }
    cout << answer;
}


int main() {
#ifndef LOCAL
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
#else
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif
    cout.precision(30);
    ll seed = time(0);
    //cerr << "Seed: " << seed << "\n";
    srand(seed);
    solve();
    return 0;
}

Compilation message (stderr)

savez.cpp: In function 'void solve()':
savez.cpp:63:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         while (len <= arr[i].size()) {
                ~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 0 / 12
• Subtask 2: 0 / 12
• Subtask 3: 0 / 12
• Subtask 4: 0 / 12
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• Subtask 10: 0 / 12