Submission #87895

#	Time	Username	Problem	Language	Result	Execution time	Memory
87895		fasterthanyou	Orchard (NOI14_orchard)	C++14	13 / 25	342 ms	89220 KiB

orchard

#include <iostream>
#include <vector>
using namespace std;

int n, m;
vector<int> suff;
vector<vector<int> > a, dp;

void solve_3()
{
	int ans = 1e9;
	suff.resize(m + 5, 0);
	dp.resize(m + 5, vector<int>(2, 0));
	for (int i = m; i >= 1; --i) suff[i] = suff[i + 1] + (a[1][i] == 1);
	for (int i = 1; i <= m; ++i)
	{
		dp[i][0] = dp[i - 1][0] + (a[1][i] == 1);
		dp[i][1] = min(dp[i - 1][1] + (a[1][i] == 0), dp[i - 1][0] + (a[1][i] == 1));
		ans = min(ans, dp[i][1] + suff[i + 1]);
	}
	cout << ans;
}

int main()
{
	cin >> n >> m;
	a.resize(n + 5, vector<int>(m + 5, 0));
	for (int i = 1; i <= n; ++i)
		for (int j = 1; j <= m; ++j)
			cin >> a[i][j];
	if (n == 1)
		solve_3();
}

• Subtask 1: 4 / 4
• Subtask 2: 4 / 4
• Subtask 3: 5 / 5
• Subtask 4: 0 / 3
• Subtask 5: 0 / 4
• Subtask 6: 0 / 5