Submission #888316

#	Time	Username	Problem	Language	Result	Execution time	Memory
888316		amirhoseinfar1385	Semiexpress (JOI17_semiexpress)	C++17	100 / 100	13 ms	6356 KiB

semiexpress

#include<bits/stdc++.h>
using namespace std;
const long long maxn=3000+10;
long long n,m,k,a,b,c,t,inf=1e9+5;
long long all[maxn];

pair<long long,long long> cal(long long now,long long val,long long maxa){
	pair<long long,long long>ret;
	if(val>t){
		return make_pair(-1,-1);
	}
	long long av=now+(t-val)/a+1;
	ret.first=av;
	if(av>maxa){
		return make_pair(-1,-1);
	}
	long long dov=av+(t-val-(av-now)*c)/a+1;
	if(t-val-(av-now)*c<0){
		return make_pair(-1,-1);
	}
	ret.second=min(dov,maxa)-av;
	return ret;
}

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	cin>>n>>m>>k>>a>>b>>c;
	cin>>t;
	n--;
	inf=n;
	for(long long i=0;i<m;i++){
		cin>>all[i];
		all[i]--;
	}
	vector<long long>alle;
	long long res=0;
	for(long long i=0;i<m;i++){
		long long z=min(a,min(b,c))*all[i];
		pair<long long,long long>next=cal(all[i],z,i<m-1?all[i+1]:inf);
		if(z<=t){
			res+=min((t-z)/a+1,(i<m-1?all[i+1]:inf+1)-all[i]);
		}
		//cout<<next.first<<" "<<next.second<<" "<<all[i]<<endl;
		long long te=0;
		while(next.second>0&&te<=k-m){
			te++;
			alle.push_back(next.second);
			next=cal(next.first,z+(next.first-all[i])*c,i<m-1?all[i+1]:inf);
		//	cout<<next.first<<" "<<next.second<<" "<<all[i]<<endl;
		}
	}
	sort(alle.rbegin(),alle.rend());
	for(long long i=0;i<min(k-m,(long long)alle.size());i++){
		res+=alle[i];
	}
	res--;
	cout<<res<<"\n";
}

• Subtask 1: 18 / 18
• Subtask 2: 30 / 30
• Subtask 3: 52 / 52