Submission #968457

#	Time	Username	Problem	Language	Result	Execution time	Memory
968457		Acanikolic	Bali Sculptures (APIO15_sculpture)	C++14	100 / 100	117 ms	612 KiB

sculpture

#include <bits/stdc++.h>
 
#define int long long
 
#define pb push_back
 
#define F first
 
#define S second
 
using namespace std;
 
const long long N = 2e5 + 10;
 
const long long mod = 998244353;
 
const long long inf = 1e18;
 
signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
 
	int n,l,r;
	cin >> n >> l >> r;
	vector<int>a(n + 1),pref(n + 1);
	for(int i = 1; i <= n; i++) {
		cin >> a[i];
		pref[i] = pref[i - 1] + a[i];
	}
	int res = (1ll << 50) - 1;
	for(int j = 49; j >= 0; j--) {
		int try_res = res ^ (1ll << j);
		vector<int>mx(n + 1);
		vector<int>mn(n + 1,inf);
		mn[0] = 0;
		for(int i = 1; i <= n; i++) {
			for(int k = 1; k <= i; k++) {
				int sum = pref[i] - pref[k - 1];
				if((sum & try_res) == sum) {
					mx[i] = max(mx[i],mx[k - 1] + 1);
					mn[i] = min(mn[i],mn[k - 1] + 1);
				}
			}
		}
		/*if(try_res == 6) {
			for(int i = 1; i <= n; i++) cout << mx[i] << " ";
			cout << endl;
			for(int i = 1; i <= n; i++) cout << mn[i] << " ";
			cout << endl;
		}*/
		int mnn = *min_element(mx.begin() + 1,mx.end());
		int mxx = *max_element(mn.begin() + 1,mn.end());
		if(mx[n] >= l && mn[n] <= r) res = try_res;
	}
	cout << res;
    return 0; 
}

Compilation message (stderr)

sculpture.cpp: In function 'int main()':
sculpture.cpp:52:7: warning: unused variable 'mnn' [-Wunused-variable]
   52 |   int mnn = *min_element(mx.begin() + 1,mx.end());
      |       ^~~
sculpture.cpp:53:7: warning: unused variable 'mxx' [-Wunused-variable]
   53 |   int mxx = *max_element(mn.begin() + 1,mn.end());
      |       ^~~

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