Submission #981458

#	Time	Username	Problem	Language	Result	Execution time	Memory
981458		12345678	Dungeons Game (IOI21_dungeons)	C++17	100 / 100	3624 ms	1913652 KiB

dungeons

#include <bits/stdc++.h>

using namespace std;

#define ll long long

const int nx=4e5+5, lx=8, kx=25;

ll N, pw[20], dist[nx];
vector<int> S(nx), P(nx), W(nx), L(nx);

struct edge
{
    int out;
    ll cost, t;
    edge(int out=0, ll cost=0, ll t=0): out(out), cost(cost), t(t){}
} dp[lx][nx][kx];

void init(int n, std::vector<int> s, std::vector<int> p, std::vector<int> w, std::vector<int> l) {
    N=n;
    pw[0]=1;
    for (int i=1; i<20; i++) pw[i]=pw[i-1]*8;
    for (int i=0; i<n; i++) S[i]=s[i], P[i]=p[i], W[i]=w[i], L[i]=l[i];
    for (int i=n-1; i>=0; i--) dist[i]=dist[w[i]]+s[i];
    W[n]=L[n]=n;
    for (int i=0; i<lx; i++)
    {
        for (int u=0; u<=n; u++)
        {
            if (s[u]<=pw[i]) dp[i][u][0]=edge(W[u], S[u], 1e18);
            else dp[i][u][0]=edge(L[u], P[u], S[u]);
        }
        for (int j=1; j<kx; j++)
        {
            for (int u=0; u<=n; u++)
            {
                int v=dp[i][u][j-1].out;
                ll out=dp[i][v][j-1].out;
                ll cost=dp[i][u][j-1].cost+dp[i][v][j-1].cost;
                ll t=min(dp[i][u][j-1].t, dp[i][v][j-1].t-dp[i][u][j-1].cost);
                dp[i][u][j]=edge(out, cost, t);
            }
        }
    }
}

long long simulate(int x, int z) {
    ll cur=z, st=0;
    while (x!=N&&cur<1e7)
    {
        //cout<<"debug "<<x<<' '<<cur<<' '<<st<<'\n';
        while (st+1<lx&&pw[st+1]<=cur) st++;
        for (int i=kx-1; i>=0; i--) if (dp[st][x][i].t>cur) cur+=dp[st][x][i].cost, x=dp[st][x][i].out; //cout<<"here "<<i<<' '<<cur<<' '<<x<<'\n';
        //cout<<"after "<<x<<' '<<cur<<' '<<st<<'\n';
        if (cur>=S[x]) cur+=S[x], x=W[x];
        else cur+=P[x], x=L[x];
    }
	return cur+dist[x];
}

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