Submission #1157656

#	Time	Username	Problem	Language	Result	Execution time	Memory
1157656		koukirocks	Semiexpress (JOI17_semiexpress)	C++20	100 / 100	7 ms	11588 KiB

semiexpress

#include<bits/stdc++.h>
#define speed ios_base::sync_with_stdio(0); cin.tie(0)

using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;

template<class T>
using vvector = vector<vector<T>>;

int main() {
    speed;
    ll n,m,k;
    cin>>n>>m>>k;
    ll a,b,c;
    cin>>a>>b>>c;
    ll T;
    cin>>T;
    vector<ll> s(m+1);
    for (ll i=1;i<=m;i++) {
        cin>>s[i];
        s[i]--;
    }
    ll sp=k-m;
    vvector<ll> rew(m+1,vector<ll>(sp+5)); 
    for (ll i=1;i<m;i++) {
        ll now=(T+s[i]*(a-b))/a+1;
        if (now<=s[i]) {
            for (ll k=0;k<=sp;k++) rew[i][k]=0;
            continue;
        }
        for (ll j=0;j<=sp;j++) {
            if (now>=s[i+1]) {
                for (ll k=j;k<=sp;k++) rew[i][k]=s[i+1]-s[i];
                break;
            }
            rew[i][j]=now-s[i];
            // cout<<i<<" "<<j<<" "<<now<<" ij now\n";
            now=(T+(a-c)*now+(c-b)*s[i])/a+1;
        }
        for (ll j=sp;j>=1;j--) rew[i][j]-=rew[i][j-1];
        // for (int j=0;j<=sp;j++) cout<<rew[i][j]<<" ";
        // cout<<"\n";
    }
    priority_queue<pll> Q;
    ll ans=0;
    vector<ll> pnt(m+1,1);
    for (ll i=1;i<m;i++) {
        ans+=rew[i][0];
        Q.push({rew[i][1],i});
    }
    for (ll i=1;i<=sp;i++) {
        auto [v,id]=Q.top();
        Q.pop();
        ans+=v;
        Q.push({rew[id][++pnt[id]],id});
    }
    cout<<ans+(n*b-b<=T)-1<<"\n";
    return 0;
}

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