Submission #1198761

#	Time	Username	Problem	Language	Result	Execution time	Memory
1198761		RaresFelix	Copy and Paste 3 (JOI22_copypaste3)	C++20	25 / 100	3095 ms	26696 KiB

copypaste3

#include <bits/stdc++.h>

using namespace std;

#define int ll
using ll = long long;
using vi = vector<int>;
using vll = vector<ll>;
using ii = pair<int, int>;
using pl = pair<ll, ll>;

const ll MOD1 = 1e9 + 7;

struct hshuri {
    ///TODO: doua moduri
    string s;
    hshuri(string s0) : s(s0) {}

    ll operator()(int st, int dr) {
        int re = 1;
        for(int j = st; j <= dr; ++j)
            re = (re * 29 + (s[j] - 'a')) % MOD1;
        return re;
    }
};

const ll INF = 1e18;

signed main() {
    cin.tie(0);
    ios_base::sync_with_stdio(0);
    int n;
    string s;
    int a, b, c;
    cin >> n >> s >> a >> b >> c;

    vector<vi> DP(n, vi(n, INF));

    hshuri HSH(s);
    for(int i = 0; i < n; ++i) DP[i][i] = a;
    for(int len = 1; len <= n; ++len) {
        vector<ii> Ord;
        for(int i = 0; i + len - 1 < n; ++i)
            Ord.push_back({HSH(i, i + len - 1), i});
        sort(Ord.begin(), Ord.end());

        for(int st = 0; st < (int)Ord.size(); ++st) {
            int dr = st;
            while(dr + 1 < (int)Ord.size() && Ord[dr + 1].first == Ord[st].first) ++dr;

            set<int> S;
            for(int j = st; j <= dr; ++j)
                S.insert(Ord[j].second);

            for(auto st0 : S) {
                int p = st0 + len - 1;
                int cost0 = b + DP[st0][p]; /// cost to start
                int cost_cur = c;

                while(p < n) {
                    //printf("Dau update la (%d...%d) cu %d + %d din (%d %d)\n", st0, p, cost_cur, cost0, st0, p);
                    DP[st0][p] = min(DP[st0][p], cost_cur + cost0);
                    if(*S.rbegin() <= p) break;
                    int urm = *S.lower_bound(p + 1);
                    cost_cur += c + a * (urm - p - 1);
                    p = urm + len - 1;
                }
            }
        }

        // de propagat chestii
        for(int i = 0; i + len < n; ++i) {
            DP[i][i + len] = min(DP[i][i + len], DP[i][i + len - 1] + a);
            DP[i][i + len] = min(DP[i][i + len], DP[i + 1][i + len] + a);
        }
    }
    cout << DP[0][n - 1] << "\n";
    return 0;
}

• Subtask 1: 1 / 1
• Subtask 2: 0 / 5
• Subtask 3: 14 / 14
• Subtask 4: 10 / 10
• Subtask 5: 0 / 32
• Subtask 6: 0 / 38