Submission #1016618

#	Time	Username	Problem	Language	Result	Execution time	Memory
1016618		JakobZorz	Dungeons Game (IOI21_dungeons)	C++17	11 / 100	7059 ms	299452 KiB

dungeons

#include"dungeons.h"
#include<vector>
typedef long long ll;
using namespace std;

int n;

struct Dungeon{
    vector<int>nxt1; // win
    vector<int>nxt2; // lose
    vector<ll>st1;  // strength
    vector<ll>st2;  // gain on losing
    ll thres=0;
    
    Dungeon(int n):nxt1(n),nxt2(n),st1(n),st2(n){}
    Dungeon()=default;
    
    
    // simulate until it either reaches n-th node, wins, or strength>=thres
    pair<int,ll>simulate(int x,ll st){
        while(st<thres&&x!=n){
            if(st>=st1[x]){
                st+=st1[x];
                x=nxt1[x];
                break;
            }
            st+=st2[x];
            x=nxt2[x];
        }
        return{x,st};
    }
};

Dungeon dun[30];

void init(int N,vector<int>s,vector<int>p,vector<int>w,vector<int>l){
    n=N;
    
    for(int pw=0;pw<30;pw++){
        dun[pw]=Dungeon(n);
        dun[pw].thres=2LL<<pw;
        for(int i=0;i<n;i++){
            if(s[i]<=1<<pw){
                dun[pw].nxt1[i]=0;
                dun[pw].nxt2[i]=w[i];
                dun[pw].st1[i]=1e18;
                dun[pw].st2[i]=s[i];
            }else if(s[i]>=2<<pw){
                dun[pw].nxt1[i]=0;
                dun[pw].nxt2[i]=l[i];
                dun[pw].st1[i]=1e18;
                dun[pw].st2[i]=p[i];
            }else{
                dun[pw].nxt1[i]=w[i];
                dun[pw].nxt2[i]=l[i];
                dun[pw].st1[i]=s[i];
                dun[pw].st2[i]=p[i];
            }
        }
    }
    dun[29].thres=1e18;
}

ll simulate(int x,int z){
    ll st=z;
    
    for(int p=0;p<30;p++){
        while(x!=n&&st<2LL<<p){
            auto r=dun[p].simulate(x,st);
            x=r.first;
            st=r.second;
        }
    }
    
	return st;
}

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