Submission #549125

#	Time	Username	Problem	Language	Result	Execution time	Memory
549125		Duy_e	Bali Sculptures (APIO15_sculpture)	C++14	21 / 100	1089 ms	348 KiB

sculpture

#include <bits/stdc++.h>
#define ll long long
#define pii pair<ll, ll>
#define st first
#define nd second
#define file "test"
using namespace std;
const long long INF = 1e18;
const long long N = 2e3 + 5;

ll n, a[N], A, B, f[N], dp[N];

ll get(int l, int r) {
	return f[r] - f[l - 1];
}

bool solve(ll x, ll pre) {
	int cnt = 1;
	ll sum = 0;

	for (int i = 0; i <= n; i ++) dp[i] = n + 1;
	dp[0] = 0;

	for (int i = 0; i <= n; i ++) {
		for (int j = i + 1; j <= n; j ++)
			if ((get(i + 1, j) | pre) <= x)
				dp[j] = min(dp[j], dp[i] + 1);
	}

	// for (int i = 1; i <= n; i ++) {
	// 	sum += a[i];
	// 	if ((sum | pre) > x) {
	// 		sum = a[i];
	// 		cnt ++;

	// 		if ((sum | pre) > x) return false;
	// 	}
	// }

	return dp[n] <= B;
}

int main()
{
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	// #ifndef ONLINE_JUDGE
	// 	freopen(file".inp","r",stdin); freopen(file".out","w",stdout);
	// #endif
	
	cin >> n >> A >> B;
	for (int i = 1; i <= n; i ++)
		cin >> a[i], f[i] = f[i - 1] + a[i];
	
	ll ans = 0;

	int last = 45;

	for (int i = 0; i < 45; i ++) {
		for (int j = 0; j < last; j ++) {
			ll tmp = ans | ((1ll << (j + 1)) - 1); 
			if (solve(ans, ans)) {i = 60; break;};
			if (solve(tmp, ans)) {
				last = j;
				ans |= 1ll << j;
				// cout << j << ' ' << ans << '\n';
			}
		}
	} 

	cout << ans;

	return 0;
}	
/**  /\_/\
    (= ._.)
    / >🍵 \>🍮

statement:
	given n number (n <= 100) a[i] <= 1e9
	and two integer A, B;
	find the way to split the initial array into x consecutive subarray
	such that the sum of or of every subarray is minimum

	x should be any number between A, B -> A <= x <= B

bitwise or operation

OR minimum -> msb is lowest

**/

Compilation message (stderr)

sculpture.cpp: In function 'bool solve(long long int, long long int)':
sculpture.cpp:18:6: warning: unused variable 'cnt' [-Wunused-variable]
   18 |  int cnt = 1;
      |      ^~~
sculpture.cpp:19:5: warning: unused variable 'sum' [-Wunused-variable]
   19 |  ll sum = 0;
      |     ^~~

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