Submission #825289

#TimeUsernameProblemLanguageResultExecution timeMemory
825289AbdelmagedNourDungeons Game (IOI21_dungeons)C++17
63 / 100
3226 ms2097152 KiB
#include <bits/stdc++.h>
//#include "grader.cpp"
using namespace std;
#include "dungeons.h"
const int LOG=25;
typedef long long ll;
struct item{
	int to;
	ll cost=0;
	ll mx=0;
};
struct node{
	vector<item> a;
	node(){
		a.resize(LOG);
	}
};
vector<vector<node> > dp;
vector<int> _s,_p,_w,_l;
int _n;
void init(int N, vector<int> S, vector<int> P, vector<int> W, vector<int> L) {
	_n=N;
	_s=S;
	_p=P;
	_w=W;
	_l=L;
	dp.resize(LOG);
	for(int z=0;z<LOG;z++){
		auto &v=dp[z];
		v.resize(_n+1);
		for(int i=0;i<_n;i++){
			if((1<<z)>=_s[i]){
				v[i].a[0].to=_w[i];
				v[i].a[0].cost=_s[i];
				v[i].a[0].mx=1e18;
			}
			else{
				v[i].a[0].to=_l[i];
				v[i].a[0].cost=_p[i];
				v[i].a[0].mx=_s[i];
			}
		}
		for(int i=1;i<LOG;i++){
			for(int j=0;j<_n;j++){
				auto a=v[j].a[i-1],b=v[v[j].a[i-1].to].a[i-1];
				if(a.to==_n){
					v[j].a[i]=a;
				}
				else{
					v[j].a[i].to=b.to;
					v[j].a[i].cost=a.cost+b.cost;
					v[j].a[i].mx=min(a.mx,b.mx-a.cost);
				}
			}
		}
	}
	return;
}

ll simulate(int x, int Z) {
	long long z=Z;
	for(int j=0;j<LOG;j++){
		for(int i=LOG-1;i>=0;i--){
			if(z<dp[j][x].a[i].mx){
				z+=dp[j][x].a[i].cost;
				x=dp[j][x].a[i].to;
				if(x==_n){
					return z;
				}
			}
		}
		if(z>=_s[x]){
			z+=_s[x];
			x=_w[x];
		}
		else{
			z+=_p[x];
			x=_l[x];
		}
		if(x==_n){
			return z;
		}
	}	
	return z;
}
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