Submission #701495

#	Time	Username	Problem	Language	Result	Execution time	Memory
701495		Sanzhar23	Bali Sculptures (APIO15_sculpture)	C++14	100 / 100	83 ms	832 KiB

sculpture

#include <bits/stdc++.h>

using namespace std;

#define ll long long	
#define pb push_back
#define bug cout << "bug" << endl
#define speed ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0)
#define all(x) x.begin(), x.end()
#define F first
#define S second
#define pll pair <ll, ll> 
#define pii pair <int, int> 
#define triple pair <pair <ll, ll> , ll>   
#define ull unsigned long long
#define ld long double
#define pinode pair <node*, node*>

const ll INF = 9e18 + 5;
const ll inf = 1e9 + 5;
const ll N = 2e3 + 5;
const ll shift = 2e6;
const ll mod = 998244353;
const ll mod2 = 1e9 + 9;
const ll M = 1e3 + 5;
const ll LOG = 21;
const ll sp = 263;
const ll sp2 = 9973;
const int block = 100;
const double eps = 1e-10;

ll n, a, b, Y[N], pref[N], max_value, ans = INF, mxY = 0, dp[N][N];
int dp2[2005];

int main(){
	speed;
	cin >> n >> a >> b;	
	for(int i = 1; i <= n; i++){
		cin >> Y[i];
		pref[i] = pref[i - 1] + Y[i];
	}
	ll current_bit_prefix = 0;
	if(a == 1){
		for(ll bit = 41; bit >= 0; bit--){
			for(int i = 0; i <= n; i++){
				dp2[i] = inf;
			}
			dp2[0] = 0;
			for(int i = 1; i <= n; i++){
				for(int j = 0; j < i; j++){
					ll sum = pref[i] - pref[j];
//					if(((sum >> (bit + 1)) & ((current_bit_prefix >> (bit + 1)) ^ (sum >> (bit + 1)))) != 0)
//						continue;
					if((sum | (current_bit_prefix + (1ll << bit) - 1ll)) == current_bit_prefix + (1ll << bit) - 1ll)
						dp2[i] = min(dp2[i], dp2[j] + 1);
				}
			}
			if(dp2[n] <= b){
				continue;
			}else{
				current_bit_prefix ^= (1ll << bit);
			}
		}
		cout << current_bit_prefix << endl;
		return 0;
	}
	for(ll bit = 41; bit >= 0; bit--){
		for(int i = 0; i <= n; i++){
			for(int j = 0; j <= n; j++){
				dp[i][j] = 0;
			}
		}
		dp[0][0] = 1;
		for(int i = 1; i <= n; i++){
			for(int part = 0; part < n; part++){
				for(int j = 0; j < i; j++){
					ll sum = pref[i] - pref[j];
					if(dp[j][part] == 0)
						continue;
					if((sum | (current_bit_prefix + (1ll << bit) - 1ll)) == current_bit_prefix + (1ll << bit) - 1ll)
						dp[i][part + 1] = 1;
				}
//				if(bit == 0)
//					cout << i << " " << part + 1 << " " << dp[i][part + 1] << endl;
			}
		}
//		return 0;
		int fl = 0;
		for(int part = a; part <= b; part++){
			if(dp[n][part]){
				fl = 1;
				break;
			}
		}
//		cout << "F " << bit << " " << fl << endl;
		if(fl)
			continue;
		current_bit_prefix ^= (1ll << bit);
	}
	cout << current_bit_prefix << endl;
}
/*	
%I64d6


6 1 3
8 1 2 1 5 4		
		

5 4 4
3 5 6 6 2
ANS = 14
OUTPUT = 15

%I64d
*/ 

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