Submission #469955

#	Time	Username	Problem	Language	Result	Execution time	Memory
469955		luciocf	Bali Sculptures (APIO15_sculpture)	C++14	0 / 100	1 ms	332 KiB

sculpture

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

const int maxn = 2e3+10;
const ll inf = 1e18;

int n;
int a[maxn];

ll pref[maxn];

ll dp[maxn][maxn];
int opt[maxn];

void solve(int l, int r, int k)
{
	if (l > r) return;

	int mid = (l+r)>>1;

	dp[k][mid] = inf;

	for (int i = opt[l-1]; i <= min(mid, opt[r+1]); i++)
		if ((dp[k-1][i-1] | (pref[mid] - pref[i-1])) <= dp[k][mid])
			dp[k][mid] = (dp[k-1][i-1] | (pref[mid] - pref[i-1])), opt[mid] = i;

	solve(l, mid-1, k); solve(mid+1, r, k);
}

int main(void)
{
	int A, B;
	scanf("%d %d %d", &n, &A, &B);

	for (int i = 1; i <= n; i++)
	{
		scanf("%d", &a[i]);

		pref[i] = pref[i-1] + 1ll*a[i]; 
	}

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

	for (int i = 1; i <= n; i++)
	{
		opt[0] = 1, opt[n+1] = n;
		solve(1, n, i);
	}

	ll ans = inf;

	for (int i = A; i <= B; i++)
		ans = min(ans, dp[i][n]);

	printf("%lld\n", ans);
}

Compilation message (stderr)

sculpture.cpp: In function 'int main()':
sculpture.cpp:36:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |  scanf("%d %d %d", &n, &A, &B);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sculpture.cpp:40:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |   scanf("%d", &a[i]);
      |   ~~~~~^~~~~~~~~~~~~

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