Submission #437147

#	Time	Username	Problem	Language	Result	Execution time	Memory
437147		jeroenodb	Dungeons Game (IOI21_dungeons)	C++17	100 / 100	4482 ms	179556 KiB

dungeons

#ifndef GRADER
#include "dungeons.h"
#endif
#pragma GCC optimize "Ofast"
#include "bits/stdc++.h"
using namespace std;
#define all(x) begin(x),end(x)
template<typename A, typename B> ostream& operator<<(ostream &os, const pair<A, B> &p) { return os << '(' << p.first << ", " << p.second << ')'; }
template<typename T_container, typename T = typename enable_if<!is_same<T_container, string>::value, typename T_container::value_type>::type> ostream& operator<<(ostream &os, const T_container &v) { string sep; for (const T &x : v) os << sep << x, sep = " "; return os; }
#define debug(a) cerr << "(" << #a << ": " << a << ")\n";
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int,int> pi;
const int mxN = 4e5+10, oo = 1e8;
const int LOG = 25;
int jmp[mxN][LOG], mn[mxN][LOG];
ll sm[mxN][LOG];
static int N;
const int B = 8000;
vi S,P,W,L;
ll prefsum[mxN] = {};
void init(int n, vector<int> s, std::vector<int> p, std::vector<int> w, std::vector<int> l) {
	S=s,P=p,W=w,L=l;
	N=n;
	jmp[n][0]=n;
	mn[n][0]=0;
	sm[n][0]=oo;
	for(int j=0;j<n;++j) {
		if(s[j]>=B) {
			jmp[j][0] = l[j], sm[j][0]=p[j];
		} else jmp[j][0] = w[j], sm[j][0] = s[j];
		mn[j][0] = (s[j]>=B?s[j]:oo);
	}

	for(int i=1;i<LOG;++i) {
		for(int j=0;j<=n;++j) {
			jmp[j][i] = jmp[jmp[j][i-1]][i-1];
			mn[j][i] = max(0LL,min((ll)mn[j][i-1],mn[jmp[j][i-1]][i-1]-sm[j][i-1]));
			sm[j][i] = sm[j][i-1]+sm[jmp[j][i-1]][i-1];
		}
	}
	for(int i=n-1;i>=0;--i) {
		prefsum[i]=S[i]+prefsum[W[i]];
	}
}

long long mysimulate(int x, ll z) {
	int n = N;
	while(z<B) {
		if(x==n) return z;
		if(z>=S[x]) {
			z+=S[x];
			x=W[x];
		} else {
			z+=P[x];
			x=L[x];
		}
	}
	// find next x: S[x]>z, can only happen log times
	// what if P[x] is very small?
	const int mxS = int(1e7);
	while(x!=n and z<mxS) {
		for(int i=LOG-1;i>=0 and z<mxS and x!=n;--i) {
			if(mn[x][i]>z) {
				z+=sm[x][i];
				x=jmp[x][i];
			}
		}
		if(x==n or z>=mxS) break;
		assert(S[x]>=B and z>=S[x]);
		if(z>=S[x]) {
			z+=S[x];
			x=W[x];
		} else {
			z+=P[x];
			x=L[x];
		}
	}
	return prefsum[x]+z;
}
long long simulate(int x, int z) {
	return mysimulate(x,z);	
}

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