제출 #990920

#제출 시각아이디문제언어결과실행 시간메모리
990920alex_2008추월 (IOI23_overtaking)C++17
0 / 100
0 ms348 KiB
#include "overtaking.h" #include <iostream> #include <vector> #include <algorithm> #include <cmath> #include <map> using namespace std; typedef long long ll; vector<vector <pair<ll, ll>>> dp; vector<vector <ll>> esim; vector <ll> t; vector <ll> w, s; ll n; ll x; ll l; ll m; bool cmp(pair<ll, ll> x, pair<ll, ll> y) { if (x.first != y.first) return x.first < y.first; if (w[x.second] != w[y.second]) return w[x.second] < w[y.second]; return x.second < y.second; } void init(int L, int N, vector<ll> T, vector<int> W, int X, int M, vector<int> S) { //dp[i][j] = [1, i] avtoneri simulyaciayi jamanak (j-rd) stanciayum hertakanutyun m = M; l = L; x = X; for (auto &it : S) { s.push_back(it); } dp.clear(); for (ll i = 0; i < N; i++) { if (W[i] > x) { //cout << "? " << T[i] << " " << W[i] << "\n"; t.push_back(T[i]); w.push_back(W[i]); n++; } } dp.resize(m); esim.resize(m); for (ll i = 0; i < n; i++) { dp[0].push_back({ t[i], i }); } sort(dp[0].begin(), dp[0].end(), cmp); for (ll j = 1; j < m; j++) { ll cur_mx = 0; for (auto& it : dp[j - 1]) { cur_mx = max(cur_mx, it.first + w[it.second] * 1ll * (s[j] - s[j - 1])); dp[j].push_back({ cur_mx, it.second }); } sort(dp[j].begin(), dp[j].end(), cmp); map <ll, ll> mp; for (auto& it : dp[j]) { mp[it.second] = it.first; } cur_mx = 0; for (auto& it : dp[j - 1]) { cur_mx = max(cur_mx, mp[it.second]); esim[j].push_back(cur_mx); } } } ll arrival_time(ll Y) { ll cur_ind = 0; for (auto it : t) { if (it < Y) cur_ind++; } if (cur_ind == 0) { return l * 1ll * x; } ll time = Y; for (ll i = 1; i < m; i++) { time = max(time + (s[i] - s[i - 1]) * 1ll * x, esim[i][cur_ind - 1]); while (cur_ind > 0 && dp[i][cur_ind - 1].first == time) { cur_ind--; } if (cur_ind == 0) { return (l - s[i]) * 1ll * x + time; } } return time; } /* int main() { } */
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