Submission #1180526

#	Time	Username	Problem	Language	Result	Execution time	Memory
1180526		gyg	Dungeons Game (IOI21_dungeons)	C++20	0 / 100	527 ms	898904 KiB

dungeons

#pragma GCC optimize("O3", "unroll-loops")
#pragma GCC target("avx2")
#include "dungeons.h"
#include <bits/stdc++.h>
using namespace std;
#define sig signed
#define int long long
#define vec vector
#define arr array
const int N = 5e4 + 5, LG = 27, INF = 1e18;

int n;
arr<int, N> wn, ls, wn_nd, ls_nd;

arr<arr<arr<vec<int>, N>, LG>, LG> jmp;
void jmp_cmp() {
	for (int i = 0; i <= 25; i++) {
		for (int u = 0; u <= n; u++) {
			if ((1 << i) >= wn[u])
				jmp[i][0][u] = {wn_nd[u], wn[u], INF};
			else 
				jmp[i][0][u] = {ls_nd[u], ls[u], wn[u] - 1};
		}
		for (int j = 1; j <= 25; j++) {
			for (int u = 0; u <= n; u++) {
				vec<int> x = jmp[i][j - 1][u];
				vec<int> y = jmp[i][j - 1][x[0]];
				jmp[i][j][u] = {y[0], x[1] + y[1], min(x[2], y[2] - x[1])};
			}
		}
	}
	// cout << jmp[0][1][0][0] << " " << jmp[0][1][0][1] << '\n';
}

void init(sig _n, vec<sig> _wn, vec<sig> _ls, vec<sig> _wn_nd, vec<sig> _ls_nd) {
	n = _n;
	for (int u = 0; u < n; u++)
		wn[u] = _wn[u], ls[u] = _ls[u], wn_nd[u] = _wn_nd[u], ls_nd[u] = _ls_nd[u];
	wn[n] = ls[n] = 0, wn_nd[n] = ls_nd[n] = n;

	jmp_cmp();
}

int fnd(int x) {
	for (int i = 25; i >= 0; i--)
		if (x >= (i << 1)) return i;
	assert(false); return -1;
}
void mv(int &u, int &s) {
	if (u == n) return;
	if (s >= wn[u]) {
		s += wn[u];
		u = wn_nd[u];
	} else {
		s += ls[u];
		u = ls_nd[u];
	}
}
int simulate(sig _u, sig _s) {
	int u = _u, s = _s;

	while (u != n) {
		int i = fnd(s);
		for (int j = 25; j >= 0; j--) {
			vec<int> x = jmp[i][j][u];
			if (s > x[2]) continue;
			if (x[0] == n) continue;
			// cout << i << " " << j << " " << u << ": " << x[0] << " " << x[1] << '\n';
			u = x[0], s += x[1];
		}
		mv(u, s);
	}
	return s;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 26
• Subtask 3: 0 / 13
• Subtask 4: 0 / 12
• Subtask 5: 0 / 27
• Subtask 6: 0 / 11