Submission #438253

#	Time	Username	Problem	Language	Result	Execution time	Memory
438253		CyanForces	Dungeons Game (IOI21_dungeons)	C++17	100 / 100	3882 ms	892892 KiB

dungeons

#include "dungeons.h"


#include <bits/stdc++.h>
using namespace std;

#define rep(i, a, b) for(int i = a; i < (b); ++i)
#define all(x) begin(x), end(x)
#define sz(x) (int)(x).size()
#define debug(...) //ignore
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef long double ld;

int n;
vi s, p, w, l;

ll LG1 = 27;

struct T {
  int node;
  ll gain;
  ll max_strength;
};

T f(T a, T b) {
  T res;
  res.node = b.node;
  res.gain = a.gain + b.gain;
  res.max_strength = min(a.max_strength, b.max_strength - a.gain);
  return res;
}

vector<vector<vector<T>>> jmp;

void ini() {
  jmp.resize(LG1);
  rep(a,0,LG1) {
    if(a % 4 != 0) continue;
    ll z = 1LL<<a;
    jmp[a].assign(log2(z)+1, vector<T>(n+1));
    rep(i,0,n) {
      if(z >= s[i]) jmp[a][0][i] = T{w[i], ll(s[i]), ll(1e18)};
      else jmp[a][0][i] = T{l[i], ll(p[i]), ll(s[i]-1)};
    }
    jmp[a][0][n] = T{n, ll(0), ll(-1)}; // immediately loose when enter node n
    rep(k,1,sz(jmp[a])) rep(i,0,n+1)
      jmp[a][k][i] = f(jmp[a][k-1][i], jmp[a][k-1][jmp[a][k-1][i].node]);
  }
}

ll sim(int x, ll z, int a) {
  if(x == n) return z;
  assert(a%4 == 0);
  assert(z >= (1LL<<a));
  assert(a < LG1);
  if(z >= (1LL<<(a+4))) return sim(x,z,a+4);
  for(int k = sz(jmp[a]); k--;) {
    if(x == n) return z;
    auto v = jmp[a][k][x];
    if(z <= v.max_strength) {
      z += v.gain;
      x = v.node;
    }
  }
  if(x == n) return z;
  if(z >= s[x]) return sim(w[x], z+s[x], a);
  else return sim(l[x], z+p[x], a);
}


void init(int n, std::vector<int> s, std::vector<int> p, std::vector<int> w, std::vector<int> l) { ::n = n; ::s = s; ::p = p; ::w = w; ::l = l; ini(); return; }

ll simulate(int x, int z) { return sim(x,z,0); }

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