Submission #596302

#	Time	Username	Problem	Language	Result	Execution time	Memory
596302		kshitij_sodani	Uplifting Excursion (BOI22_vault)	C++14	0 / 100	1 ms	468 KiB

vault

#include <bits/stdc++.h>
using namespace std;
typedef long long llo;
#define a first
#define b second
#define pb push_back
#define endl '\n'


llo n,dd;
llo it[350];
llo dp[1000001];
deque<pair<llo,llo>> zz[301];
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cin>>n>>dd;
	llo cot=0;
	for(llo i=0;i<n;i++){
		llo aa;
		cin>>aa;
		cot+=aa;
	}
	llo su=0;
	for(llo i=0;i<=n;i++){
		cin>>it[i];
		su+=it[i]*i;
		cot+=it[i];
	}
	if(su<dd){
		cout<<"impossible"<<endl;
		return 0;
	}
	llo cur=su-dd;
	it[0]=0;
	llo ans=-1;
	for(llo i=1;i<=n;i++){
		llo su2=0;
		llo ac=0;
		for(llo j=i+1;j<=n;j++){
			llo xx=it[j]-n;
			if(xx<0){
				xx=0;
			}
			ac+=xx;
			su2+=xx*j;
		}
		if(su2>cur){
			continue;
		}
		llo su3=n*n*n;
		/*for(llo j=1;j<i;j++){
			su3+=j*min(n,it[j]);
		}
		for(llo j=i+1;j<n;j++){
			su3+=j*min(it[j],n);
		}*/

		for(llo j=0;j<=su3;j++){
			dp[j]=-1;
		}
		dp[0]=0;
		for(llo j=1;j<i;j++){
			for(int jj=0;jj<j;jj++){
				zz[jj].clear();
			}
			for(int ii=0;ii<=su3;ii++){
				int y=ii%j;
				if(dp[ii]>=0){
					pair<int,int> cur={dp[ii]-(ii/j),ii};
					while(zz[y].size()){
						if(zz[y].back().a>=cur.a){
							zz[y].pop_back();
						}
						else{
							break;
						}
					}
					zz[y].pb(cur);
				}
				while(zz[y].size()){
					if(zz[y].front().b<ii-j*min(it[i],n)){
						zz[y].pop_front();
					}
					else{
						break;
					}
				}
				if(zz[y].size()){
					llo xx=zz[y].front().a+(ii/j) ;
					if(dp[ii]==-1){
						dp[ii]=xx;
					}
					dp[ii]=min(dp[ii],xx);
				}
			}
		/*	for(llo ii=su3;ii>=0;ii--){
				llo co=0;
				for(llo jj=ii;jj>=0 and jj>=ii-j*n;jj-=j){
					if(dp[jj]>=0){
						llo xx=dp[jj]+co;
						if(co>it[j]){
							continue;
						}
						if(dp[ii]==-1){
							dp[ii]=xx;
						}
						dp[ii]=min(dp[ii],xx);
					}
					co++;
				}
			}*/
		}
		for(llo j=i+1;j<=n;j++){
			for(llo ii=su3;ii>=0;ii--){
				llo co=0;
				for(llo jj=ii;jj>=0 and jj>=ii-j*min(it[j],n);jj-=j){
					if(dp[jj]>=0){
						llo xx=dp[jj]+co;
/*						if(co>min(it[j],n)){
							continue;
						}*/
						if(dp[ii]==-1){
							dp[ii]=xx;
						}
						dp[ii]=min(dp[ii],xx);
					}
					co++;
				}
			}
		}
		llo cur2=cur-su2;

		for(llo j=0;j<=su3;j++){
			if(cur2>=j and dp[j]>=0){
				if((cur2-j)%i==0){
					llo x=(cur2-j)/i;
					if(x<=it[i]){
						llo y=dp[j]+x;
						y+=ac;
						if(ans==-1){
							ans=y;
						}
					/*	
						if(y==11){
							cout<<dp[j]<<endl;
							cout<<cur2<<",,,,"<<su2<<endl;
							cout<<i<<"::"<<j<<endl;
						}*/
						ans=min(ans,y);
					}
				}
			}
		}

	}
	if(ans==-1){
		cout<<"impossible"<<endl;
	}
	else{
		//cout<<ans<<endl;
		cout<<cot-ans<<endl;
	}

	//else find minimum number of elements with sum su-dd










	return 0;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 15
• Subtask 3-1: 0 / 10
• Subtask 3-2: 0 / 10
• Subtask 4-1: 0 / 10
• Subtask 4-2: 0 / 10
• Subtask 5-1: 0 / 10
• Subtask 5-2: 0 / 10
• Subtask 6-1: 0 / 10
• Subtask 6-2: 0 / 10