Submission #1119254

#	Time	Username	Problem	Language	Result	Execution time	Memory
1119254		blackslex	Overtaking (IOI23_overtaking)	C++17	65 / 100	3532 ms	79080 KiB

overtaking

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

using namespace std;
using ll = long long;
using pii = pair<ll, ll>;

const int N = 1005;
ll l, n, m, x;
vector<ll> w, s;
vector<ll> t;
vector<vector<ll>> e, ct;
multiset<pii> ms[N];

void init(int L, int N, std::vector<long long> T, std::vector<int> W, int X, int M, std::vector<int> S){
    l = L; n = N; t = T; x = X; m = M;
    w.resize(n); s.resize(m);
    for (int i = 0; i < n; i++) w[i] = W[i];
    for (int i = 0; i < m; i++) s[i] = S[i];
    e = vector<vector<ll>>(n, vector<ll>(m));
    ct = vector<vector<ll>>(n, vector<ll>(m));
    for (int i = 0; i < n; i++) ct[i][0] = t[i];
    for (int j = 1; j < m; j++) {
        map<ll, vector<ll>> mp;
        ll cmx = 0;
        for (int i = 0; i < n; i++) {
            e[i][j] = ct[i][j - 1] + w[i] * (s[j] - s[j - 1]);
            mp[ct[i][j - 1]].emplace_back(i);
        }
        for (auto &[x, y]: mp) {
            for (auto &E: y) ct[E][j] = max(e[E][j], cmx);
            for (auto &E: y) cmx = max(cmx, e[E][j]);
        }
    }
    for (int j = 1; j < m; j++) {
        map<ll, vector<ll>> mp;
        ll cmx = 0;
        for (int i = 0; i < n; i++) {
            mp[ct[i][j - 1]].emplace_back(i);
        }
        for (auto &[x, y]: mp) {
            for (auto &E: y) cmx = max(cmx, e[E][j]);
            ms[j].emplace(x, cmx);
        }
    }
    return;
}

long long arrival_time(long long Y){
    ll cur = Y;
    for (int j = 1; j < m; j++) {
        ll nval = cur + x * (s[j] - s[j - 1]);
        auto it = ms[j].lower_bound({cur, 0});
        if (it != ms[j].begin()) {
            it--;
            nval = max(nval, it->second);
        }
        cur = nval;
    }
    return cur;
}

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