Submission #719655

#	Time	Username	Problem	Language	Result	Execution time	Memory
719655		Abrar_Al_Samit	Copy and Paste 3 (JOI22_copypaste3)	C++17	25 / 100	3083 ms	8276 KiB

copypaste3

#include<bits/stdc++.h>
using namespace std;

const int nax = 1002;
const long long INF = 1e18;
const int P = 31;
const int M = 1e9 + 9;

int n;
string s;
long long A, B, C;
long long dp[nax][nax];
long long hv[nax];
long long pw[nax];

bool same(int l1, int r1, int l2, int r2) {
	long long h1 = hv[r1] - hv[l1-1];
	long long h2 = hv[r2] - hv[l2-1];
	if(h1<0) h1 += M;
	if(h2<0) h2 += M;

	if(r1<r2) h1 = (h1 * pw[r2-r1]) % M;
	else h2 = (h2 * pw[r1-r2]) % M;

	return h1==h2;
}
long long solve(int i, int j) {
	long long &ret = dp[i][j];
	if(ret!=-1) return ret;
	if(i==j) return A;

	ret = min((j-i+1) * A, solve(i+1, j) + A);

	for(int k=1; k<j-i+1; ++k) {
		int cnt = 0;
		int p = i;
		while(p+k-1<=j) {
			if(same(i, i+k-1, p, p+k-1)) {
				++cnt;
				p += k;
			} else ++p;
		}


		long long cur = solve(i, i+k-1) + B;
		cur += cnt * C;
		cur += ((j-i+1) - cnt * k) * A;

		ret = min(ret, cur);

	}
	return ret;
}
void PlayGround() {
	cin>>n>>s>>A>>B>>C;

	memset(dp, -1, sizeof dp);
	s = '@' + s;

	pw[0] = 1;
	for(int i=1; i<=n; ++i) {
		pw[i] = (pw[i-1] * P) % M;
		hv[i] = (pw[i] * (s[i]-'a'+1)) + hv[i-1];
		hv[i] %= M;
	}

	cout<<solve(1, n)<<'\n';

	// cerr << "Time elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n";
}
int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	PlayGround();
	return 0;
}

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