Submission #389614

#	Time	Username	Problem	Language	Result	Execution time	Memory
389614		milleniumEeee	Bali Sculptures (APIO15_sculpture)	C++17	71 / 100	1086 ms	4300 KiB

sculpture

#include <bits/stdc++.h>
#define fr first
#define sc second
#define pii pair<int, int>
#define pb push_back
#define szof(s) (int)s.size()
#define all(s) s.begin(), s.end()
#define fastInp ios_base::sync_with_stdio(0); cin.tie(0);
#define int long long
using namespace std;

const int MAXN = 2005;
const int INF = 1e18;

int y[MAXN];
int pref[MAXN];

int get_sum(int l, int r) {
	return pref[r] - pref[l - 1];
}


bool dp[MAXN][MAXN];
int n, a, b;

bool in(int small, int big) {
	return ((big & small) == small);
}

// можно использовать только биты в x
bool check(int x) {
	memset(dp, 0, sizeof(dp));
	dp[0][0] = 1;
	for (int gr = 1; gr <= b; gr++) {
		for (int i = gr; i <= n; i++) {
			for (int last = 0; last < i; last++) {
				if (dp[gr - 1][last] && in(get_sum(last + 1, i), x)) {
					dp[gr][i] = 1;
				}
			}
		}
	}
	for (int gr = a; gr <= b; gr++) {
		if (dp[gr][n]) {
			return true;
		}
	}
	return false;
}

signed main() {
	fastInp;
	cin >> n >> a >> b;
	for (int i = 1; i <= n; i++) {
		cin >> y[i];
		pref[i] = pref[i - 1] + y[i];
	}
	int cur = (1ll << 63) - 1;
	for (int i = 62; i >= 0; i--) {
		if (check(cur ^ (1ll << i))) {
			cur ^= (1ll << i);
		}
	}
	cout << cur << endl;
}

/*
6 1 3
8 1 2 1 5 4
*/

Compilation message (stderr)

sculpture.cpp: In function 'int main()':
sculpture.cpp:58:24: warning: integer overflow in expression of type 'long long int' results in '9223372036854775807' [-Woverflow]
   58 |  int cur = (1ll << 63) - 1;
      |            ~~~~~~~~~~~~^~~

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