Submission #1220774

#	Time	Username	Problem	Language	Result	Execution time	Memory
1220774		abdelhakim	Overtaking (IOI23_overtaking)	C++20	0 / 100	0 ms	328 KiB

overtaking

#include "overtaking.h"
#include <bits/stdc++.h>
#define ll long long
#define dbg(x) cerr << #x << ' ' << x << endl;
using namespace std;
ll l,n;
vector<ll> t;
vector<int> w;
ll x, m;
vector<int> s;
vector<vector<ll>> p;
vector<vector<vector<ll>>> v;
void init(int L, int N, std::vector<long long> T, std::vector<int> W, int X, int M, std::vector<int> S)
{
    p.assign(M,vector<ll>(N));
    v.resize(M);
    
    l=L;
    n=N;
    t=T;
    w=W;
    x=X;
    m=M;
    s=S;
    for (int i=0;i<n;i++)
    {   
       vector<ll> tr={t[i],(ll)((s[1]-s[0])*W[i]),(ll)i};
        v[0].push_back(tr);
    }
    sort(v[0].begin(),v[0].end());
    for (int i=0;i<n;i++)
    {
        if(i==0) p[0][i]=v[0][i][1];
        else p[0][i]=max(v[0][i][1],p[0][i-1]);
    }
    for (int i=0;i<m-1;i++)
    {
        sort(v[i].begin(), v[i].end());
        ll lst=0;
        for (int j=0;j<v[i].size();j++)
        {
            ll e=(s[i+1]-s[i])*w[v[i][j].back()]+v[i][j][0];
            v[i][j][1]=e;
            if(j!=0 && v[i][j][0]!=v[i][j-1][0])
            {
                lst=p[i][j-1];
            }
            v[i+1].push_back({max(e,lst),-1,v[i][j].back()});
            p[i][j]=max(e,p[i][j-1+(j==0)]);
        }
    }
    return;
}

long long arrival_time(long long Y)
{
    ll curt=Y;
    ll cur2=t[0];
    for (int i=0;i<m-1;i++)
    {
        ll e=curt+(s[i+1]-s[i])*x;
        ll e2=cur2+(s[i+1]-s[i])*w[0];
        if(curt<cur2)e2=max(e2,e);
        else e=max(e,e2);
        // ll ind=lower_bound(v[i].begin(),v[i].end(),vector<ll>({curt,0,0}))-v[i].begin()-1;
        // if(ind>=0)
        // {
        //     e=max(e,p[i][ind]);
        // }
        curt=e;
        cur2=e2;
    }
    return curt;
}

• Subtask 0: 0 / 0
• Subtask 1: 0 / 9
• Subtask 2: 0 / 10
• Subtask 3: 0 / 20
• Subtask 4: 0 / 26
• Subtask 5: 0 / 35