Submission #256709

#	Time	Username	Problem	Language	Result	Execution time	Memory
256709		MrRobot_28	Holding (COCI20_holding)	C++17	110 / 110	226 ms	12288 KiB

holding

#include<bits/stdc++.h>
 
using namespace std;
signed main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);
	int n, l, r, k;
	cin >> n >> l >> r >> k;
	vector <int> a(n);
	for(int i = 0; i < n; i++)
	{
		cin >> a[i];
	}
	l--;
	r--;
	int sum = 0, ans = 0;
	vector <pair <int, int> > mass1, mass2, mass3;
	for(int i = 0; i < n; i++)
	{
		if(i < l)
		{
			mass1.push_back({a[i], i});
		}
		else if(i <= r){
			sum += a[i];
			ans += a[i];
			mass2.push_back({a[i], i});
		}
		else
		{
			mass3.push_back({a[i], i});
		}
	}
	vector <vector <int> > dp1(n + 1, vector <int> (k + 1, 0));
	vector <vector <int> > dp2(n + 1, vector <int> (k + 1, 0));
	vector <int> dp0(k + 1, 0);
	vector <vector <int> > dpleft(mass2.size(), vector <int> (k + 1, 0));
	vector <vector <int> > dpright(mass2.size(), vector <int> (k + 1, 0));
	for(int i = 0; i < mass2.size(); i++)
	{
		for(int t = 0; t <= k; t++)
		{
			dp0[t] = 0;
		}
		for(int j = 0; j < mass1.size(); j++)
		{
			for(int t = 0; t <= k; t++)
			{
				dp0[t] = min(dp0[t], dp1[j][t]);
			}
			for(int t = 0; t + abs(mass2[i].second - mass1[j].second) <= k; t++)
			{
				dp2[j + 1][t + abs(mass2[i].second - mass1[j].second)] = 
				min(dp2[j + 1][t + abs(mass2[i].second - mass1[j].second)], dp0[t] + mass1[j].first - mass2[i].first);
			}
		}
		for(int j = 0; j <= mass1.size(); j++)
		{
			for(int t = 0; t <= k; t++)
			{
				dp1[j][t] = dp2[j][t];
				dpleft[i][t] = min(dpleft[i][t], dp1[j][t]);
			}
		}
	}
	for(int j = 0; j <= mass3.size(); j++)
	{
		for(int t= 0; t <= k; t++)
		{
			dp1[j][t] = 0;
			dp2[j][t] = 0;
		}
	}
	for(int i = mass2.size() - 1; i >= 0; i--)
	{
		for(int t = 0; t <= k; t++)
		{
			dp0[t] = 0;
		}
		for(int j = mass3.size(); j > 0; j--)
		{
			for(int t = 0; t <= k; t++)
			{
				dp0[t] = min(dp0[t], dp1[j][t]);	
			}
			for(int t = 0; t + abs(mass2[i].second - mass3[j - 1].second) <= k; t++)
			{
				dp2[j - 1][t + abs(mass2[i].second - mass3[j - 1].second)] = 
				min(dp2[j - 1][t + abs(mass2[i].second - mass3[j - 1].second)], dp0[t] + mass3[j - 1].first - mass2[i].first);
			}
		}
		for(int j = 0; j <= mass3.size(); j++)
		{
			for(int t = 0; t <= k; t++)
			{
				dp1[j][t] = dp2[j][t];
				dpright[i][t] = min(dpright[i][t], dp1[j][t]);
			}
		}
	}
	for(int j = 0; j <= k; j++)
	{
		ans = min(ans, sum + dpleft[mass2.size() - 1][j]);
		ans = min(ans, sum + dpright[0][j]);
	}
	vector <int> dppred(k + 1, 0);
	for(int i = 0; i < mass2.size() - 1; i++)
	{
		for(int j = 0; j <= k; j++)
		{
			dppred[j] = dpright[i + 1][j];
		}
		for(int j = 1; j <= k; j++)
		{
			dppred[j] = min(dppred[j], dppred[j - 1]);
		}
		for(int j = 0; j <= k; j++)
		{
			ans = min(ans, sum + dpleft[i][j] + dppred[k - j]);
		}
	}
	cout << ans;
	return 0;
}

Compilation message (stderr)

holding.cpp: In function 'int main()':
holding.cpp:40:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < mass2.size(); i++)
                 ~~^~~~~~~~~~~~~~
holding.cpp:46:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int j = 0; j < mass1.size(); j++)
                  ~~^~~~~~~~~~~~~~
holding.cpp:58:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int j = 0; j <= mass1.size(); j++)
                  ~~^~~~~~~~~~~~~~~
holding.cpp:67:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int j = 0; j <= mass3.size(); j++)
                 ~~^~~~~~~~~~~~~~~
holding.cpp:93:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int j = 0; j <= mass3.size(); j++)
                  ~~^~~~~~~~~~~~~~~
holding.cpp:108:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < mass2.size() - 1; i++)
                 ~~^~~~~~~~~~~~~~~~~~

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