Submission #104567

#	Time	Username	Problem	Language	Result	Execution time	Memory
104567		YottaByte	Bali Sculptures (APIO15_sculpture)	C++14	0 / 100	493 ms	16816 KiB

sculpture

#include <iostream>
using namespace std;

#define int long long
#define pc __builtin_popcount

const int N = 21, inf = 1073741824;

int n, a, b, ans = inf, ar[N], dp[1 << 20];

void calc(int mask) {
	if(pc(mask) + 1 > b || dp[mask] > -1) {
		return;
	}
	
	if(a <= pc(mask) + 1 && pc(mask) + 1 <= b) {
		if(dp[mask] == -1) {
			int sum = 0, temp = 0;
			for(int i = 0; i < n; i++) {
				sum += ar[i];
				if(mask & (1 << i)) {
					temp |= sum;
					sum = 0;
				}
			}
			temp |= sum;
			dp[mask] = temp;
		}
		
		ans = min(ans, dp[mask]);
	}
	
	if(pc(mask) + 1 == b) {
		return;
	}
	
	for(int i = 0; i < n; i++) {
		if(mask >> i & 1); else {
			calc(1 << i | mask);
		}
	}
}

main() {
	cin >> n >> a >> b;
	
	for(int i = 0; i < (1 << 20); i++) {
		dp[i] = -1;
	}
	
	for(int i = 0; i < n; i++) {
		cin >> ar[i];
	}
	
	calc(0);
	
	cout << ans << endl;
}

Compilation message (stderr)

sculpture.cpp:44:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main() {
      ^

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