Submission #1161985

#	Time	Username	Problem	Language	Result	Execution time	Memory
1161985		brover29	Semiexpress (JOI17_semiexpress)	C++17	100 / 100	3 ms	328 KiB

semiexpress

#include <bits/stdc++.h>
//qwerty47924692
using namespace std;
using ll = long long;
const ll N=3005;
const string br="617283";
#define sz(a)(ll)a.size()
#define f first
#define s second
ll n,m,k,a,b,c,t,d[N],s[N],L[N],dist[N],u[N];
ll cost(ll i,ll k){
    if(i>n)return 0;
    return min(n-i,(t-k)/a);
}
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin>>n>>m>>k>>a>>b>>c>>t;
    ll ans=0;
    for(ll i=1;i<=m;i++)cin>>s[i];
    for(ll i=1;i<=m;i++){
        if(s[i]>1&&t-(s[i]-1)*b>=0)ans++;
        dist[i]=(t-(s[i]-1)*b);
        if(dist[i]<0)continue;
        ll l=s[i]+dist[i]/a+1,r=s[i+1];
        L[i]=min(l,r);
    }
    for(ll iter=1;iter<=k-m;iter++){
        ll id=-1,mx=0;
        for(ll i=1;i<m;i++){
            if(dist[i]<0)continue;
            ll cost=t-((s[i]-1)*b+(L[i]-s[i])*c);
            if(cost<0||L[i]==s[i+1])continue;
            ll cnt=max(0ll,min(s[i+1]-1-L[i],cost/a))+1;
            if(cnt>mx){
                mx=cnt;
                id=i;
            }
        }
        if(id==-1)break;
        ll cost=t-((s[id]-1)*b+(L[id]-s[id])*c);
        ll cnt=max(0ll,min(s[id+1]-1-L[id],cost/a))+1;
        L[id]+=cnt;
    }
    for(ll i=1;i<m;i++){
        if(dist[i]>=0)ans+=max(0ll,L[i]-s[i]-1);
    }
    cout<<ans;
}

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