Submission #1016426

#	Time	Username	Problem	Language	Result	Execution time	Memory
1016426		12345678	Overtaking (IOI23_overtaking)	C++17	65 / 100	3535 ms	57456 KiB

overtaking

#include "overtaking.h"
#include <bits/stdc++.h>

using namespace std;

#define ll long long

const int nx=1e3+5;

ll n, m, e[nx][nx], t[nx][nx], sz, x;
vector<ll> l, w, s;
vector<pair<ll, ll>> dp[nx];

void init(int L, int N, std::vector<long long> T, std::vector<int> W, int X, int M, std::vector<int> S)
{
    n=N, m=M, x=X;
    s.resize(m);
    for (int i=0; i<n; i++) if (W[i]>X) l.push_back(T[i]), w.push_back(W[i]);
    for (int i=0; i<m; i++) s[i]=S[i];
    sz=l.size();
    for (int i=0; i<sz; i++) t[0][i]=l[i];
    for (int i=1; i<m; i++)
    {
        vector<pair<ll, pair<ll, ll>>> v;
        for (int j=0; j<sz; j++) e[i][j]=t[i-1][j]+(s[i]-s[i-1])*w[j], v.push_back({t[i-1][j], {e[i][j], j}});
        sort(v.begin(), v.end());
        ll mx=0;
        for (int j=0; j<sz; j++) mx=max(mx, v[j].second.first), t[i][v[j].second.second]=mx;
    }
    for (int i=0; i<m-1; i++) for (int j=0; j<sz; j++) dp[i].push_back({t[i][j], t[i][j]+(s[i+1]-s[i])*w[j]});
    for (int i=0; i<m-1; i++) sort(dp[i].begin(), dp[i].end());
    for (int i=0; i<m-1; i++) for (int j=1; j<sz; j++) dp[i][j].second=max(dp[i][j].second, dp[i][j-1].second);
    //for (int i=0; i<m-1; i++) for (int j=0; j<sz; j++) cout<<"dp "<<i<<' '<<j<<' '<<dp[i][j].first<<' '<<dp[i][j].second<<'\n';
}

long long arrival_time(long long Y)
{
    ll res=Y;
    //cout<<"dp\n";
    //for (int i=0; i<sz; i++) cout<<dp[1][i].first<<' '<<dp[1][i].second<<'\n';
    for (int i=0; i<m-1; i++)
    {
        auto itr=lower_bound(dp[i].begin(), dp[i].end(), make_pair(res, LLONG_MIN));
        res=res+(s[i+1]-s[i])*x;
        if (itr!=dp[i].begin()) res=max(res, prev(itr)->second);
        //cout<<"debug "<<i<<' '<<res<<'\n';
    }
    return res;
}

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