Submission #615786

#	Time	Username	Problem	Language	Result	Execution time	Memory
615786		Clan328	Dungeons Game (IOI21_dungeons)	C++17	0 / 100	1 ms	724 KiB

dungeons

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef vector<vi> vvi;
typedef vector<vl> vvl;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

int n;
vector<pair<ll, ll>> G, W;
vl dp;

vl invG, invW;

const int LOG = 20;
vvi up;
vvl sum;
vi visited;

void dfs(int v, int p) {
	if (visited[v]) return;
	visited[v] = true;

	up[v][0] = p;
	sum[v][0] = W[v].second;
	for (int i = 1; i < LOG; i++) {
		sum[v][i] = sum[v][i-1] + sum[up[v][i-1]][i-1];
		up[v][i] = up[up[v][i-1]][i-1];
	}

	dfs(invG[v], v);
}

ll getDP(int i) {
	if (dp[i] != -1) return dp[i];
	if (i == n) {
		dp[i] = 0;
		return 0;
	}
	dp[i] = W[i].first+getDP(G[i].first);
	return dp[i];
}

void init(int nx, vi s, vi p, vi w, vi l) {
	n = nx;
	G = vector<pll>(n);
	W = vector<pll>(n);

	invG = vector<ll>(n);
	invW = vector<ll>(n);
	for (int i = 0; i < n; i++) {
		G[i] = {w[i], l[i]};
		W[i] = {s[i], p[i]};

		invG[l[i]] = i;
		invW[l[i]] = p[i];
	}

	dp = vl(n+1, -1);
	for (int i = 0; i <= n; i++) {
		dp[i] = getDP(i);
	}

	vi par(n);
	for (int i = 0; i < n; i++) {
		par[i] = G[i].second;
	}

	visited = vi(n);
	up = vvi(n, vi(LOG));
	sum = vvl(n, vl(LOG));
	for (int i = 0; i < n; i++) {
		if (!visited[i]) dfs(i, par[i]);
	}
}

ll simulate(int x, int z) {
	if (z >= W[0].first) {
		return z + dp[x];
	}

	ll strength = z;
	for (int i = LOG-1; i >= 0; i--) {
		if (sum[x][i]+strength < W[0].first) {
			strength += sum[x][i];
			x = up[x][i];
		}
	}

	return strength+sum[x][0]+dp[up[x][0]];
}

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