Submission #673656

#	Time	Username	Problem	Language	Result	Execution time	Memory
673656		abysmal	Copy and Paste 3 (JOI22_copypaste3)	C++14	62 / 100	621 ms	74120 KiB

copypaste3

#include<iostream>
#include<stdio.h>
#include<stdint.h>
#include<vector>
#include<algorithm>
#include<utility>
#include<set>
#include<map>
#include<queue>
#include<stack>

using namespace std;

const int64_t INF = (int64_t) 1e18 + 777;
const int64_t mINF = 2500 + 5;
const int64_t MOD = 1e9 + 9;
const int nbit = 11;
const int ndig = 10;
const int nchar = 26;
const int p = 61;
const int D = 4;
int dr[D] = {0, 1, 0, -1};
int dc[D] = {1, 0, -1, 0};

struct Thing
{
    int h;
    int id;

    Thing(int h_, int id_) : h(h_), id(id_) {}

    bool operator < (const Thing& o) const
    {
        if(h != o.h) return h > o.h;
        return id < o.id;
    }
};

struct Solution
{
    int n;
    string s;
    int64_t a;
    int64_t b;
    int64_t c;
    Solution() {}

    void solve()
    {
        cin >> n >> s >> a >> b >> c;
        vector<vector<int> > h(n, vector<int>(n, -1));
        for(int i = 0; i < n; i++)
        {
            int tmp = 0;
            int pow = 1;
            for(int j = i; j < n; j++)
            {
                int ch = s[j] - 'a' + 1;
                ch = modmul(ch, pow);

                tmp = modadd(tmp, ch);
                pow = modmul(pow, p);

                h[i][j] = tmp;
            }
        }

        vector<vector<int64_t> > dp(n, vector<int64_t>(n, INF));
        for(int i = 0; i < n; i++)
        {
            dp[i][i] = a;
        }

        for(int len = 0; len < n; len++)
        {
            set<Thing> st;

            for(int i = 0; i < n; i++)
            {
                int j = i + len;
                if(j >= n) break;

                st.insert(Thing(h[i][j], i));
            }

            for(int i = 0; i < n; i++)
            {
                int j = i + len;
                if(len == 0 || j >= n) break;

                dp[i][j] = min(dp[i][j], dp[i][j - 1] + a);
                if(i != n - 1) dp[i][j] = min(dp[i][j], dp[i + 1][j] + a);
            }

            vector<Thing> tt;
            for(set<Thing>::iterator it = st.begin(); it != st.end(); it++)
            {
                tt.push_back(*(it));
            }

            int k = tt.size();
            int tid = 0;
            vector<int> nx(n, -1);
            while(tid < k)
            {
                int last = tt[tid].h;
                vector<int> pos;
                while(tid < k && tt[tid].h == last)
                {
                    pos.push_back(tt[tid].id);
                    tid++;
                }

                int ps = pos.size();
                int r = ps - 1;
                for(int i = ps - 2; i >= 0; i--)
                {
                    while(r > 0 && pos[r - 1] > pos[i] + len) r--;

                    if(pos[r] > pos[i] + len) nx[pos[i]] = pos[r];
                }
            }

            for(int64_t i = 0; i < n; i++)
            {
                int64_t l = i;
                int64_t j = i + len;

                int64_t cnt = 2;
                while(nx[l] != -1)
                {
                    int64_t nl = nx[l];
                    int64_t nr = nl + len;

                    int64_t x = nr - i + 1 - cnt * (len + 1);
                    dp[i][nr] = min(dp[i][nr], dp[i][j] + b + c * cnt + a * x);

                    cnt++;
                    l = nl;
                }
            }
        }

//        for(int i = 0; i < n; i++)
//        {
//            for(int j = 0; j < n; j++)
//            {
//                if(dp[i][j] == INF) cout << "I ";
//                else cout << dp[i][j] << " ";
//            }
//            cout << "\n";
//        }

        cout << dp[0][n - 1];
    }

    int modsub(int t1, int t2)
    {
        int res = t1 - t2;
        if(res < 0) res += MOD;

        return res;
    }

    int modadd(int t1, int t2)
    {
        int res = t1 + t2;
        if(res >= MOD) res -= MOD;

        return res;
    }

    int modmul(int t1, int t2)
    {
        int64_t res = 1LL * t1 * t2;
        return (res % MOD);
    }

    bool BIT(int& mask, int& j)
    {
        return (mask & MASK(j));
    }

    int MASK(int j)
    {
        return (1 << j);
    }
};

void __startup()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);

//    freopen("in.txt", "r", stdin);
//    freopen("out.txt", "w", stdout);
}

int main()
{
    __startup();
    int t = 1;
//    cin >> t;

    for(int i = 1; i <= t; i++)
    {
        Solution().solve();
    }

    return 0;
}

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