Submission #965732

#	Time	Username	Problem	Language	Result	Execution time	Memory
965732		Der_Vlapos	Copy and Paste 3 (JOI22_copypaste3)	C++17	30 / 100	898 ms	132716 KiB

copypaste3

// #pragma GCC target("avx2")
// #pragma GCC optimize("O3")
// #include <x86intrin.h>
 
#include <bits/stdc++.h>
#include <chrono>
#include <random>
 
// @author: Vlapos
 
namespace operators
{
	template <typename T1, typename T2>
	std::istream &operator>>(std::istream &in, std::pair<T1, T2> &x)
	{
		in >> x.first >> x.second;
		return in;
	}
 
	template <typename T1, typename T2>
	std::ostream &operator<<(std::ostream &out, std::pair<T1, T2> x)
	{
		out << x.first << " " << x.second;
		return out;
	}
 
	template <typename T1>
	std::istream &operator>>(std::istream &in, std::vector<T1> &x)
	{
		for (auto &i : x)
			in >> i;
		return in;
	}
 
	template <typename T1>
	std::ostream &operator<<(std::ostream &out, std::vector<T1> &x)
	{
		for (auto &i : x)
			out << i << " ";
		return out;
	}
 
	template <typename T1>
	std::ostream &operator<<(std::ostream &out, std::set<T1> &x)
	{
		for (auto &i : x)
			out << i << " ";
		return out;
	}
}
 
// name spaces
using namespace std;
using namespace operators;
// end of name spaces
 
// defines
#define ll long long
#define ull unsigned long long
#define pb push_back
#define mp make_pair
#define pii pair<int, int>
#define pll pair<ll, ll>
#define f first
#define s second
#define uint unsigned int
#define all(vc) vc.begin(), vc.end()
// end of defines
 
// usefull stuff
 
void boost()
{
	ios_base ::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
}
 
inline int getbit(int &x, int &bt) { return (x >> bt) & 1; }
 
const int dx4[4] = {-1, 0, 0, 1};
const int dy4[4] = {0, -1, 1, 0};
const int dx8[8] = {-1, -1, -1, 0, 0, 1, 1, 1};
const int dy8[8] = {-1, -0, 1, -1, 1, -1, 0, 1};
 
const ll INF = (1e18) + 500;
const int BIG = (1e9) * 2 + 100;
const int MAXN = (1e5) + 5;
const int MOD7 = (1e9) + 7;
const int MOD9 = (1e9) + 9;
const uint MODFFT = 998244353;
 
#define int ll
 
struct test
{
	void solve(int testcase)
	{
		boost();
 
		int n;
		cin >> n;
 
		string s;
		cin >> s;
		int a, b, c;
		cin >> a >> b >> c;
 
		vector<vector<int>> dp(n, vector<int>(n, INF));
		for (int i = 0; i < n; ++i)
			dp[i][i] = a;
 
		unordered_map<int, vector<int>> last;
		vector<vector<int>> PR(n, vector<int>(n));
 
		for (int l = 0; l < n; ++l)
		{
			int h1 = 0, h2 = 0;
			for (int r = l; r < n; ++r)
			{
				h1 = ((h1 * 911) % MODFFT + s[r]) % MODFFT;
				// h2 = ((h2 * 13) % MOD7 + s[r]) % MOD7;
				auto &v = last[h1];
				auto it = lower_bound(all(v), l);
				if (it != v.begin())
					PR[l][r] = *prev(it) - (r - l);
				else
					PR[l][r] = -1;
				last[h1].pb(r);
			}
		}
 
		for (int l = n - 1; l >= 0; --l)
			for (int r = l; r < n; ++r)
			{
				if (l - 1 >= 0)
					dp[l - 1][r] = min(dp[l - 1][r], dp[l][r] + a);
				if (r + 1 < n)
					dp[l][r + 1] = min(dp[l][r + 1], dp[l][r] + a);
 
				int prevL = l, prevR = r, len = r - l, cnt = 0, op = c;
				while (prevL != -1)
				{
					dp[prevL][r] = min(dp[prevL][r], dp[l][r] + cnt * a + b + op);
 
					op += c;
					cnt += prevL - 1;
					prevL = PR[prevL][prevR];
					prevR = prevL + len;
					cnt -= prevR;
				}
			}
 
		cout << dp[0][n - 1] << '\n';
	}
};
 
main()
{
	boost();
	int q = 1;
	// cin >> q;
	for (int i = 0; i < q; i++)
	{
		test t;
		t.solve(i);
	}
	return 0;
}
//[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]//
//                                                                                    //
//                               Coded by Der_Vlἀpos                                  //
//                                                                                    //
//[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]//

Compilation message (stderr)

copypaste3.cpp: In member function 'void test::solve(long long int)':
copypaste3.cpp:118:16: warning: unused variable 'h2' [-Wunused-variable]
  118 |    int h1 = 0, h2 = 0;
      |                ^~
copypaste3.cpp: At global scope:
copypaste3.cpp:158:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  158 | main()
      | ^~~~

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