Submission #554903

#	Time	Username	Problem	Language	Result	Execution time	Memory
554903		UncoolAnon	Copy and Paste 3 (JOI22_copypaste3)	C++17	20 / 100	1555 ms	740 KiB

copypaste3

#include <bits/stdc++.h>
#define int long long 
using namespace std; 
const int inf=(1LL<<60); 
int n,a,b,c; string s; 
vector<int> z(string s) {
    int n = (int) s.length();
    vector<int> z(n);
    for (int i = 1, l = 0, r = 0; i < n; ++i) {
        if (i <= r)
            z[i] = min (r - i + 1, z[i - l]);
        while (i + z[i] < n && s[z[i]] == s[i + z[i]])
            ++z[i];
        if (i + z[i] - 1 > r)
            l = i, r = i + z[i] - 1;
    }
    return z;
}
int solve(string s){
	int n=s.size(); 
	vector<int> p=z(s),dp(n,inf); 
	vector<vector<int>> A(n+1); 
	set<int> cur;
	for(int i=1;i<n;i++){
		if(p[i]==0) continue; 
		A[p[i]].push_back(i); 
		cur.insert(i); 
	}
	//for(int&x:p) cout << x << " " ; cout << endl << s << endl ; 
	//	return 0 ; 
	dp[0]=a; 
	for(int i=0;i<n;i++){	
		if(i) dp[i]=min(dp[i],dp[i-1]+a); 
		int mx=1,last=i;
		while(1){
			auto it = cur.lower_bound(last+1); 
			if(it==cur.end()) break; 
			last=*it+i;
			mx++;
			dp[last]=min(dp[last],dp[i]+b+c*mx+a*(last-i-(mx-1)*(i+1))); 
		}
		for(int x:A[i+1]) 
			cur.erase(x); 
	}
	return dp.back(); 
}
signed main(){
	ios_base::sync_with_stdio(0); 
	cin.tie(nullptr); 
	cin>>n>>s>>a>>b>>c; 
	reverse(s.begin(),s.end()); 
	int answer=inf; 
	for(int i=0;i<n;i++){
		string ns;
		for(int j=i;j<n;j++)ns+=s[j]; 
		answer=min(answer,solve(ns)+a*i);
	}
	cout << answer; 
}

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