Submission #206505

#	Time	Username	Problem	Language	Result	Execution time	Memory
206505		luciocf	Holding (COCI20_holding)	C++14	0 / 110	5 ms	632 KiB

holding

#include <bits/stdc++.h>

using namespace std;

const int maxn = 110;
const int maxk = 2505;
const int inf = 1e9+10;

int a[maxn];
int dp1[maxn][maxn][maxk], dp2[maxn][maxn][maxk];

int main(void)
{
	int n, l, r, k;
	scanf("%d %d %d %d", &n, &l, &r, &k);
	k = min(k, maxk-1);

	int soma = 0;
	for (int i = 1; i <= n; i++)
	{
		scanf("%d", &a[i]);

		if (i >= l && i <= r) soma += a[i];
	}

	for (int i = 0; i <= l; i++)
		for (int j = l-1; j <= r; j++)
			for (int x = 0; x <= k; x++)
				dp1[i][j][x] = inf;

	dp1[0][l-1][0] = dp1[0][l][0] = dp1[1][l-1][0] = soma;

	for (int i = 1; i < l; i++)
	{
		for (int j = l; j <= r; j++)
		{
			for (int x = k; x >= 0; x--)
			{
				dp1[i][j][x] = min(dp1[i][j-1][x], dp1[i-1][j][x]);

				if (x-(j-i) >= 0)
					dp1[i][j][x] = min(dp1[i][j][x], a[i]-a[j]+dp1[i-1][j-1][x-(j-i)]);
			}
		}
	}

	for (int i = l; i <= r+1; i++)
		for (int j = r+1; j <= n+1; j++)
			for (int x = 0; x <= k; x++)
				dp2[i][j][x] = inf;

	dp2[r+1][n+1][0] = dp2[r+1][n][0] = dp2[r][n+1][0] = soma;

	for (int i = r; i >= l; i--)
	{
		for (int j = n; j > r; j--)
		{
			for (int x = k; x >= 0; x--)
			{
				dp2[i][j][x] = min(dp2[i+1][j][x], dp2[i][j+1][x]);

				if (x-(j-i) >= 0)
					dp2[i][j][x] = min(dp2[i][j][x], a[j]-a[i]+dp2[i+1][j+1][x-(j-i)]);
			}
		}
	}

	int ans = inf;
	for (int x = 0; x <= k; x++)
		ans = min(ans, dp2[l][r+1][x]);
	for (int x = 0; x <= k; x++)
		ans = min(ans, dp1[l-1][r][x]);

	for (int i = l; i <= r; i++)
		for (int x = 0; x <= k; x++)
			ans = min(ans, dp1[l-1][i][x] + dp2[i+1][r+1][k-x]);

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

Compilation message (stderr)

holding.cpp: In function 'int main()':
holding.cpp:15:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d %d %d", &n, &l, &r, &k);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
holding.cpp:21:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &a[i]);
   ~~~~~^~~~~~~~~~~~~

• Subtask 1: 0 / 22
• Subtask 2: 0 / 33
• Subtask 3: 0 / 33
• Subtask 4: 0 / 22