Submission #1009818

#	Time	Username	Problem	Language	Result	Execution time	Memory
1009818		mindiyak	Dungeons Game (IOI21_dungeons)	C++17	0 / 100	7052 ms	41860 KiB

dungeons

#include "dungeons.h"
#include <bits/stdc++.h>
#include <string>
#include <iostream>
#include <cmath>
#include <numeric>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<int, int> pi;
typedef pair<int, int> pl;
typedef pair<ld, ld> pd;
typedef vector<int> vi;
typedef vector<bool> vb;
typedef vector<vector<int>> vvi;
typedef vector<vector<ll>> vvl;
typedef vector<ld> vd;
typedef vector<ll> vl;
typedef vector<pi> vpi;
typedef vector<pl> vpl;
#define FOR(i, a, b) for (int i = a; i < (b); i++)
#define F0R(i, a) for (int i = 0; i < (a); i++)
#define FORd(i, a, b) for (int i = (b)-1; i >= a; i--)
#define F0Rd(i, a) for (int i = (a)-1; i >= 0; i--)
#define trav(a, x) for (auto &a : x)
#define uid(a, b) uniform_int_distribution<int>(a, b)(rng)
#define len(x) (int)(x).size()
#define mp make_pair
#define pb push_back
#define F first
#define nl endl
#define S second
#define lb lower_bound
#define ub upper_bound
#define aint(x) x.begin(), x.end()
#define raint(x) x.rbegin(), x.rend()
#define ins insert
const int MOD = 1000000007;
 
vi S,P,W,L,x;
vl dist,loopedsum,looped;
int N;
vvl loop_ends,loop_sums;

void dfs(int start,int pos,ll sum,set<int> vis){
	if(sum >= S[0])return;
	if(vis.count(pos)){
		if(pos == start){
			looped[pos] = 1;
			loopedsum[pos] = sum;
		}
		return;
	}
	vis.insert(pos);
	sum += P[pos];
	pos = L[pos];
	loop_ends[start].pb(pos);
	loop_sums[start].pb(sum);
	dfs(start,pos,sum,vis);
}
 
void init(int n, std::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;
	dist = vl(n+1,-1);
	looped = vl(n+1,0);
	loopedsum = vl(n+1,0);
	loop_ends = vvl(n+1,vl());
	loop_sums = vvl(n+1,vl());
	dist[n] = 0;
	for(int i = n-1;i>=0;i--){
		dist[i] = dist[W[i]] + 1;
	}
	FOR(i,0,n){
		set<int> vis;
		dfs(i,i,0,vis);
	}

	// cout << "############" << endl;
	// FOR(i,0,n){
	// 	cout <<  i << " -> " << endl;
	// 	for(auto a:loop_ends[i])cout << a << " ";
	// 	cout << endl;
	// 	for(auto a:loop_sums[i])cout << a << " ";
	// 	cout << endl;
	// 	cout << endl;
	// }
	// for(auto a:looped)cout << a << " ";
	// cout << endl;
	// for(auto a:loopedsum)cout << a << " ";
	// cout << endl;
	// cout << "############" << endl;
}
 
long long simulate(int x, int z) {
	if(x == N)return z;
	if(z < S[x]){
		ll ans = z;
		ll need = S[x] - z;
		int n = loop_ends[x].size();


		if(looped[x]){
			ll counter = need/loopedsum[x];
			ans += loopedsum[x] * counter;
			need = S[x] - ans;
		}
		// if(n<2)simulate(L[x],z+P[x]);
		// if(need > loop_sums[x][n-2]){
		// 	if(loop_ends[x][0] != loop_ends[x][n-2]){
		// 		return simulate(loop_ends[x][n-2],z+loop_sums[x][n-2]);
		// 	}
		// 	ll counter = need/loop_sums[x][n-2];
		// 	ans += loop_sums[x][n-2] * counter;
		// 	need -= loop_sums[x][n-2] * counter;
		// }
		int pos = lower_bound(loop_sums[x].begin(),loop_sums[x].end(),need) - loop_sums[x].begin();
		if(pos == n)return simulate(loop_ends[x][pos-1],ans+loop_sums[x][pos-1]);
		return simulate(loop_ends[x][pos],ans+loop_sums[x][pos]);
	}
	return z+S[x]*(dist[x]);
}

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