Submission #198072

#	Time	Username	Problem	Language	Result	Execution time	Memory
198072		AryaKnight	Holding (COCI20_holding)	C++14	110 / 110	686 ms	8444 KiB

holding

#include<bits/stdc++.h>
using namespace std;

#define all(a) a.begin(),a.end()
#define F first
#define S second
#define pb push_back
#define ll long long
#define vi vector<int>
#define pi pair<int,int>
#define mp make_pair
 
#ifdef LOCAL
#include "debug.h"
#else
#define debug(...) 42
#endif
 
const int mod=1e9+7;
 
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
 
int mul(int a,int b)
{
	return ((a)*1ll*(b))%mod;
}
 
void add(int &a,int b)
{
	a+=b;
	if(a>=mod)a-=mod;
}
 
int sub(int a,int b){
	a-=b;
	if(a<0){
		a+=mod;
	}
	return a;
}
 
int powz(int a,int b)
{
	int res=1;
	while(b)
	{
		if(b&1){
			res=mul(res,a);
		}
		b/=2;
		a=mul(a,a);
	}
	return res;
}
 
template <typename A, typename B>
istream& operator>>(istream& input,pair<A,B>& x) {
	input>>x.F>>x.S;
	return input;
}
 
template <typename A>
istream& operator>>(istream& input,vector<A>& x) {
	for(auto& i:x)
		input>>i;
	return input;
}
 
template<typename A>
ostream& operator<<(ostream& output,vector<A>& x) {
	for(auto& i:x)
		output<<i<<' ';
	return output;
}
 
const int N=1000002;

int dp[105][10005],dp2[105][10005],new_dp[105][10005];

void solve(){
	int n,l,r,k;
	cin>>n>>l>>r>>k;
	vi a(n);
	cin>>a;
	int tot=r-l+1;
	l--;r--;
	for(int i=0;i<l;i++){
		for(int j=0;j<=tot-1;j++){
			for(int put=j+1;put<=tot;put++){
				int tott=abs(put+l-1-i),val=a[l+put-1]-a[i];
				if(val<=0){
					continue;
				}
				for(int cost=0;cost<=k-tott;cost++){
					new_dp[put][cost+tott]=max(new_dp[put][cost+tott],dp[j][cost]+val);
				}
			}
		}
		for(int j=0;j<=tot;j++){
			for(int cost=0;cost<=k;cost++){
				dp[j][cost]=max(dp[j][cost],new_dp[j][cost]);
				new_dp[j][cost]=0;
			}
		}
	}
	for(int i=n-1;i>r;i--){
		for(int j=0;j<=tot-1;j++){
			for(int put=j+1;put<=tot;put++){
				int tott=abs(r-put+1-i),val=a[r-put+1]-a[i];
				if(val<=0){
					continue;
				}
				for(int cost=0;cost<=k-tott;cost++){
					new_dp[put][cost+tott]=max(new_dp[put][cost+tott],dp2[j][cost]+val);
				}
			}
		}
		for(int j=0;j<=tot;j++){
			for(int cost=0;cost<=k;cost++){
				dp2[j][cost]=max(dp2[j][cost],new_dp[j][cost]);
				new_dp[j][cost]=0;
			}
		}
	}
	vector<vector<int>>calc(n+1,vector<int>(10005));
	for(int j=0;j<=tot;j++){
		for(int cost=0;cost<=k;cost++){
			if(cost){
				calc[j][cost]=max({calc[j][cost],calc[j][cost-1],dp[j][cost]});
			}
			else{
				calc[j][cost]=dp[j][cost];
			}
		}
	}
	int ans=0;
	for(int i=0;i<=tot;i++){
		for(int j=0;j<=tot-i;j++){
			for(int cost=0;cost<=k;cost++){
				int cost2=k-cost;
				ans=max(ans,calc[i][cost2]+dp2[j][cost]);
			}
		}
	}
	int sum=ans;
	sum*=-1;
	for(int i=l;i<=r;i++){
		sum+=a[i];
	}
	cout<<sum;
}
 
signed main(){
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	int tc=1;
	//~cin>>tc;
	for(int _=0;_<tc;_++){
		//~ cout<<"Case #"<<_+1<<": ";
		solve();
		if(_!=tc-1)
		cout<<"\n";
	}
}

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