제출 #445902

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
445902		aryan12	Bali Sculptures (APIO15_sculpture)	C++17	71 / 100	130 ms	452 KiB

sculpture

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

mt19937_64 RNG(chrono::steady_clock::now().time_since_epoch().count());

const int N = 2010, INF = 1e15;
int arr[N];
int n, a, b;

int Check(int val) {
	//cout << "val = " << val << "\n";
	int dp[n + 2][b + 1];
	for(int i = 0; i <= n + 1; i++) {
		for(int j = 0; j <= b; j++) {
			dp[i][j] = 0;
		}
	}
	dp[1][0] = 1;
	for(int i = 1; i <= n; i++) {
		for(int j = 0; j < b; j++) {
			if(dp[i][j] == 0) {
				continue;
			}
			/*if(val == 9) {
				cout << "i = " << i << ", j = " << j << ", dp[i][j] has been deemed true\n";
			}*/
			for(int k = i; k <= n; k++) {
				int tot = arr[k] - arr[i - 1];
				if((val ^ tot) == (val - tot)) {
					dp[k + 1][j + 1] = 1;
					/*if(val == 9) {
						cout << "dp[i][j] goes to dp[" << k + 1 << "][" << j + 1 << "]\n";
					}*/
				}
			}
		}
	}
	/*if(val == 9) {
		for(int i = 1; i <= n + 1; i++) {
			for(int j = 0; j <= b; j++) {
				cout << dp[i][j] << " ";
			}
			cout << "\n";
		}
	}*/
	for(int i = a; i <= b; i++) {
		if(dp[n + 1][i] == 1) {
			return 1;
		}
	}
	return 0;
}

int Check2(int val) {
	int dp[n + 2];
	for(int i = 0; i <= n + 1; i++) {
		dp[i] = INF;
	}
	dp[1] = 0;
	for(int i = 1; i < n + 1; i++) {
		for(int j = i + 1; j <= n + 1; j++) {
			int sum = arr[j - 1] - arr[i - 1];
			//cout << "i = " << i << ", j = " << j << ", sum = " << sum << "\n";
			if((val ^ sum) == (val - sum)) {
				dp[j] = min(dp[j], dp[i] + 1);
			}
		}
	}
	/*for(int i = 0; i <= n + 1; i++) {
		cout << dp[i] << " ";
	}
	cout << "\n";*/
	if(dp[n + 1] <= b) {
		return 1;
	}
	return 0;
}

void Solve() {
	cin >> n >> a >> b;
	arr[0] = 0;
	for(int i = 1; i <= n; i++) {
		cin >> arr[i];
		arr[i] += arr[i - 1];
	}
	int ans = (1LL << 40) - 1;
	for(int i = 39; i >= 0; i--) {
		//cout << "i = " << i << "\n";
		//cout << "ans = " << ans << "\n";
		//cout << " ";
		ans ^= (1LL << i);
		if(a >= 2 && Check(ans) == 0) {
			ans ^= (1LL << i);
		}
		else if(a < 2 && Check2(ans) == 0) {
			ans ^= (1LL << i);
		}
		//cout << "Finally, answer = " << ans << "\n";
	}
	//cout << " ";
	cout << ans << "\n";
}

int32_t main() {
	auto begin = std::chrono::high_resolution_clock::now();
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	int t = 1;
	//cin >> t;
	while(t--) {
		Solve();
	}
	auto end = std::chrono::high_resolution_clock::now();
    auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin);
    cerr << "Time measured: " << elapsed.count() * 1e-9 << " seconds.\n"; 
	return 0;
}

• Subtask 1: 9 / 9
• Subtask 2: 16 / 16
• Subtask 3: 21 / 21
• Subtask 4: 25 / 25
• Subtask 5: 0 / 29