제출 #879802

#제출 시각아이디문제언어결과실행 시간메모리
879802abcvuitunggioDungeons Game (IOI21_dungeons)C++17
100 / 100
6275 ms1869620 KiB
#include "dungeons.h"
#include <bits/stdc++.h>
using namespace std;
const int sz=6;
const long long INF=1e18;
int nxt[400001][24][sz+1];
long long mx[400001][24][sz+1],mn[400001][24][sz+1],sum[400001][24][sz+1];
vector <int> S,P,ve={1};
void init(int n, vector <int> s, vector <int> p, vector <int> w, vector <int> l){
    S=s;
    P=p;
    for (int i=1;i<sz;i++)
        ve.push_back(ve.back()*15);
    memset(nxt,-1,sizeof(nxt));
    for (int i=0;i<n;i++){
        for (int j=0;j<sz;j++)
            if (s[i]<=ve[j]){
                nxt[i][0][j]=w[i];
                sum[i][0][j]=s[i];
                mn[i][0][j]=INF;
            }
            else{
                nxt[i][0][j]=l[i];
                sum[i][0][j]=p[i];
                mn[i][0][j]=s[i];
            }
        nxt[i][0][sz]=w[i];
        mx[i][0][sz]=s[i];
        sum[i][0][sz]=s[i];
    }
    for (int j=1;j<24;j++){
        for (int i=0;i<n;i++)
            for (int k=0;k<=sz;k++){
                if (nxt[i][j-1][k]==-1)
                    continue;
                int u=nxt[i][j-1][k];
                nxt[i][j][k]=nxt[u][j-1][k];
                mx[i][j][k]=max(mx[i][j-1][k],mx[u][j-1][k]-sum[i][j-1][k]);
                mn[i][j][k]=min(mn[i][j-1][k],mn[u][j-1][k]-sum[i][j-1][k]);
                sum[i][j][k]=sum[i][j-1][k]+sum[u][j-1][k];
            }
    }
}
long long simulate(int x, int Z){
    int b=0;
    long long z=Z;
    while (nxt[x][0][0]!=-1){
        int j=(b?upper_bound(ve.begin(),ve.end(),z)-ve.begin()-1:sz);
        for (int i=23;i>=0;i--)
            if (nxt[x][i][j]!=-1)
                if ((b&&z<mn[x][i][j])||(!b&&z>=mx[x][i][j])){
                    z+=sum[x][i][j];
                    x=nxt[x][i][j];
                }
        b^=1;
    }
	return z;
}
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