Submission #443307

#	Time	Username	Problem	Language	Result	Execution time	Memory
443307		JvThunder	Dungeons Game (IOI21_dungeons)	C++17	100 / 100	4050 ms	713444 KiB

dungeons

#include "dungeons.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;

const int N = 4 * (int)1e5;
const int C0 = 8;
const int C1 = 1;
const int H = 24;
const ll INF = 1e9 + 7;

pair<int, pair<ll, ll>> jmp[N + 1][H / C0][H / C1];
ll add[N + 1];
ll str[N + 1];
ll bns[N + 1];
int wt[N + 1];
int lt[N + 1];
int n;

pair<int, ll> advance(pair<int, ll> cur) {
	if (str[cur.first] > cur.second) return {lt[cur.first], bns[cur.first] + cur.second};
	else return {wt[cur.first], str[cur.first] + cur.second};
}

void init(int n_, vector<int> s, vector<int> p, vector<int> w, vector<int> l) {
	n = n_;
	for (int i = 0; i < n; ++i) str[i] = s[i];
	for (int i = 0; i < n; ++i) bns[i] = p[i];
	for (int i = 0; i < n; ++i) wt[i] = w[i];
	for (int i = 0; i < n; ++i) lt[i] = l[i];
	str[n] = INF;
	bns[n] = INF;
	wt[n] = n;
	lt[n] = n;

	add[n] = 0;
	for (int i = n-1; i >= 0; --i) add[i] = add[wt[i]] + str[i];
	
	for (int a = 0; a < H / C0; ++a) {
		ll lo = 1 << (C0 * a);
		ll hi = 1 << (C0 * (a + 1));
		for (int i = 0; i <= n; ++i) {
			if ((lo < str[i] && str[i] < hi) || i == n) {
				jmp[i][a][0] = {lt[i], {str[i], bns[i]}};
			} else if (str[i] <= lo) {
				jmp[i][a][0] = {wt[i], {INF, str[i]}};
			} else {
				jmp[i][a][0] = {lt[i], {INF, bns[i]}};
			}
		}
		for (int b = 1; b < H / C1; ++b) {
			for (int i = 0; i <= n; ++i) {
				int j = i;
				ll min_str = INF, str_add = 0;
				for (int it = 0; it < (1 << C1); ++it) {
					auto pr = jmp[j][a][b - 1];
					min_str = min(min_str, pr.second.first - str_add);
					str_add += pr.second.second;
					j = pr.first;
				}
				jmp[i][a][b] = {j, {min_str, str_add}};
			}
		}
	}
}

long long simulate(int start_i, int ini_pwr) {
	pair<int, ll> state = {start_i, (ll)ini_pwr};
	for (int a = 0; a < H; ++a) {
		ll lo = 1 << (C0 * a);
		ll hi = 1 << (C0 * (a + 1));
		while(state.first != n && lo <= state.second && state.second < hi) {
			for (int b = (H/C1) - 1; b >= 0; --b) {
				while(state.second < jmp[state.first][a][b].second.first && state.second + jmp[state.first][a][b].second.second < hi) {
					state.second += jmp[state.first][a][b].second.second;
					state.first = jmp[state.first][a][b].first;
				}
			}
			if (state.first != n) state = advance(state); // either win against opponent in same strength bracket, or break out of strength bracket
		}
	}
	return state.second + add[state.first];
}

• Subtask 1: 11 / 11
• Subtask 2: 26 / 26
• Subtask 3: 13 / 13
• Subtask 4: 12 / 12
• Subtask 5: 27 / 27
• Subtask 6: 11 / 11