Submission #972726

#	Time	Username	Problem	Language	Result	Execution time	Memory
972726		Halym2007	Bali Sculptures (APIO15_sculpture)	C++17	100 / 100	69 ms	604 KiB

sculpture

#include <bits/stdc++.h>
using namespace std;
#define ll long long
const int N = 2e3 + 5;
ll n, A, B, dp[N], a[N], dp1[105][105];

bool check (ll x) {
	for (int i = 1; i <= n; ++i) {
		dp[i] = 1e9;
	}
	for (int i = 1; i <= n; ++i) {
		ll sum = 0;
		for (int j = i; j > 0; j--) {
			sum += a[j];
			if ((sum & x) == sum) {
				dp[i] = min (dp[i], dp[j - 1] + 1);
			}
		}
	}
	return dp[n] <= B;
}

bool check1 (ll x) {
	for (int i = 0; i <= n; ++i) {
		for (int j = 0; j <= n; ++j) {
			dp1[i][j] = 0;
		}
	}
	dp1[0][0] = 1;
	for (int i = 1; i <= n; ++i) {
		for (int j = 1; j <= i; ++j) {
			ll sum = 0;
			for (int k = i; k > 0; k--) {
				sum += a[k];
				if ((sum & x) == sum) {
					dp1[i][j] |= dp1[k - 1][j - 1];
				}
			}
		}
	}
	for (int i = A; i <= B; ++i) {
		if (dp1[n][i]) return 1;
	}
	return 0; 
}

int main () {
//	freopen ("input.txt", "r", stdin);
	cin >> n >> A >> B;
	for (int i = 1; i <= n; ++i) {
		cin >> a[i];
	}
	ll x = (1LL << 42) - 1;
	for (int i = 41; i >= 0; i--) {
		x ^= (1LL << i);
		if (A == 1 and !check(x)) {
			x ^= (1LL << i);
		}
		else if (A > 1 and !check1(x)) {
			x ^= (1LL << i);
		}
	}
	cout << x << "\n";
}

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