Submission #552057

#	Time	Username	Problem	Language	Result	Execution time	Memory
552057		Ronin13	Copy and Paste 3 (JOI22_copypaste3)	C++14	100 / 100	766 ms	70736 KiB

copypaste3

#include<bits/stdc++.h>
#define ll long long
#define f first
#define s second
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pb push_back
#define epb emplace_back
#define ull unsigned ll
using namespace std;

const int NMAX = 2501;
const ll inf = 1e9 + 1;


int dp1[NMAX][NMAX];
int adj[NMAX][NMAX];
ll dp[NMAX][NMAX];

int main(){
    ios_base::sync_with_stdio(false); cin.tie(0);
    int n; cin >> n;
    string s; cin >> s;
    ll a, b, c; cin >> a >> b >> c;
    for(int i = 1; i <= n; i++){
        for(int j = 1; j < i; j++){
            if(s[i - 1] != s[j - 1]) dp1[i][j] = 0;
            else dp1[i][j] = dp1[i - 1][j - 1] + 1;
        }
    }
    /*for(int i = 1; i <= n; i++){
        for(int j = 1; j <= n; j++){
            cout << dp1[i][j] << ' ';
        }
        cout << "\n";
    }*/
    for(int i = 1; i <= n; i++){
        int mn = 0;
        for(int j = i - 1; j > 0; j--){
            int x = min(dp1[i][j], i - j);
            while(mn < x){
                mn++;
                adj[i - mn + 1][mn] = j - mn + 1;
            }
        }
    }
    vector <vector <int> > vec(n + 1);
    for(int i = 1; i <= n; i++){
        for(int i = 1; i <= n; i++) vec[i].clear();
        for(int j = i; j >= 1; j--){
            int cur = j;
            int len = i - j + 1;
            while(cur){
                vec[cur].pb(len);
                cur = adj[cur][len];
            }
        }
        ll cnt[n + 1];
        for(int i = 1; i <= n; i++){
          cnt[i] = 0;
        }
        ll mn = 0;
        dp[i][i] = a;
        for(int j = i; j > 0; j--){
            dp[i][j] = dp[i - 1][j] + a;
            for(int to : vec[j]){
                cnt[to]++;
                mn = min(mn, (c - to * a) * cnt[to] + dp[i][i - to + 1] + b);
            }
            dp[i][j] = min(dp[i][j], mn + (i - j + 1) * a);
        }
    }
    /*for(int i = 1; i <= n; i++){
        for(int j = 1; j <= n; j++){
            cout << dp[i][j] << ' ';
        }
        cout << "\n";
    }*/
    cout << dp[n][1];
    return 0;
}

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