Submission #767074

#	Time	Username	Problem	Language	Result	Execution time	Memory
767074		oyber	Mechanical Doll (IOI18_doll)	C++14	0 / 100	1 ms	212 KiB

doll

#include "doll.h"
#include <cstdio>
using namespace std;

vector<int> c;
vector<int> xs;
vector<int> ys;
vector<int> a;
int ai = 0;
int n = 0;

struct Switch;
extern Switch* switches;
int add_switch(Switch);

struct Switch {
  int x;
  int y;
  int state;

  void gen_childs(int num) {
    if (num == 2) {
      xs.push_back(0);
      ys.push_back(0);
      return;
    }
    if (num == 3) {
      Switch s = Switch{0, 0, 0};
      x = add_switch(s);
      xs.push_back(-x);
      ys.push_back(0);
      switches[x].gen_childs(2);
      return;
    }
    Switch s1 = Switch{0, 0, 0};
    x = add_switch(s1);
    xs.push_back(-x);
    Switch s2 = Switch{0, 0, 0};
    y = add_switch(s2);
    ys.push_back(-y);
    switches[x].gen_childs(num/2);
    switches[y].gen_childs(num-num/2);
  }

  int get() {
    int next = x;
    if (state == 1) next = y;
    state = !state;
    return next;
  }
};

#define NUM_SWITCHES 1000000
Switch switches2[NUM_SWITCHES];
Switch* switches = switches2;
int index = 1;

int add_switch(Switch s) {
  switches[index] = s;
  index++;
  return index-1;
}

void sim_switches(int s) {
  int next = switches[s].get();
  if (next == 0) { 
    if (ai < n) {
      next = a[ai];
      if (switches[s].state == 1) {
        xs[s-1] = next;
        //printf("x: (%d %d)\n", s-1, next);
      } else {
        ys[s-1] = next;
        //printf("x: (%d %d)\n", s-1, next);
      }
      ai++;
      sim_switches(1);
    }
    return;
  }
  sim_switches(next);
}

void create_circuit(int M, std::vector<int> A) {
  a = A;
  int N = A.size();
  n = N;

  int s = add_switch(Switch{0,0,0});
  switches[s].gen_childs(N);
  sim_switches(1);

  vector<int> C(M + 1);
  C[0] = -1;
  for (int i = 1; i <= M; ++i) {
    C[i] = -1;
  }
  C[A[N-1]] = 0;
  
  /*printf("C: ");
  for (int i = 0; i <= M; i++) {
    printf("%d, ", C[i]);
  }
  printf("\n");

  printf("X: ");
  for (int i = 0; i < int(xs.size()); i++) {
    printf("%d, ", xs[i]);
  }
  printf("\n");

  printf("Y: ");
  for (int i = 0; i < int(ys.size()); i++) {
    printf("%d, ", ys[i]);
  }
  printf("\n");
*/
  answer(C, xs, ys);
}

• Subtask 1: 0 / 2
• Subtask 2: 0 / 4
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 18
• Subtask 6: 0 / 56