Submission #922103

#	Time	Username	Problem	Language	Result	Execution time	Memory
922103		vjudge1	Copy and Paste 3 (JOI22_copypaste3)	C++17	30 / 100	1834 ms	116484 KiB

copypaste3

// I stand with PALESTINE




//#pragma GCC optimize("Ofast,O3")
//#pragma GCC target("avx,avx2")
#include "bits/stdc++.h"

using namespace std;
using ll = long long;
const ll inf = 1e18;
const int mod = 1007173513, coeff = 995269721;

void solve() {
    int n;
    ll A, B, C;
    string s;
    cin >> n >> s >> A >> B >> C;
    vector dp(n, vector(n, inf));
    vector hash(n, vector(n, 0ll));
    map<ll, vector<int>> pos;
    for (int i = 0; i < n; i++) {
        ll val = 0, pw = 1;
        for (int j = i; j < n; j++) {
            val = (val + (s[j] - 'a' + 1) * pw) % mod;
            pw = pw * coeff % mod;
            hash[i][j] = val;
            pos[val].emplace_back(i);
        }
    }
//    set<ll> st;
//    for (int ln = 1; ln <= n; ln++) {
//        for (int i = 0, j = ln - 1; j < n; i++, j++) assert(!st.count(hash[i][j]));
//        for (int i = 0, j = ln - 1; j < n; i++, j++) st.insert(hash[i][j]);
//    }
    for (int i = n - 1; i >= 0; i--) {
        for (int j = i; j < n; j++) {
            dp[i][j] = min(dp[i][j], (j - i + 1) * A);
            if (i != j) {
                dp[i][j] = min(dp[i][j], dp[i + 1][j] + A);
                dp[i][j] = min(dp[i][j], dp[i][j - 1] + A);
            }
            auto &it = pos[hash[i][j]];
            int h = upper_bound(it.begin(), it.end(), j) - it.begin(), cnt = 1;
            int ln = j - i + 1;
//            cout << i << ' ' << j << ' ' << dp[i][j] << endl;
            while (h != it.size()) {
                h = it[h] + ln - 1;
                cnt++;
                dp[i][h] = min(dp[i][h], dp[i][j] + B + cnt * C + (h - i + 1 - ln * cnt) * A);
//                cout << '\t' << i << ' ' << h << ' ' << dp[i][h] << endl;
                h = upper_bound(it.begin(), it.end(), h) - it.begin();
            }
        }
    }
    cout << dp[0][n - 1];
}

int main() {
    cin.tie(0)->sync_with_stdio(false);
#ifdef sunnatov
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif
    int q = 1;
//    cin >> q;
    while (q--)  {
        solve();
        cout << '\n';
    }
}

Compilation message (stderr)

copypaste3.cpp: In function 'void solve()':
copypaste3.cpp:48:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |             while (h != it.size()) {
      |                    ~~^~~~~~~~~~~~

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