Submission #316085

#	Time	Username	Problem	Language	Result	Execution time	Memory
316085		MrDomino	The Big Prize (IOI17_prize)	C++14	20 / 100	69 ms	384 KiB

prize

#include <bits/stdc++.h>
#include "prize.h"

using namespace std;

mt19937 rng((long long) (new char));

int rn(int l, int r) {
  return l + rng() % (r - l + 1);
}

int rep(int l, int r) {
  if (l > r) return 0;
  int i = rn(l, r);
  ///int i = (l + r) / 2;
  vector<int> v = ask(i);
  if (v[0] == 0 && v[1] == 0) return i;
  if (v[0] > v[1]) {
    int x = rep(l, i - 1);
    if (x || v[1] == 0) {
      return x;
    } else {
      return rep(i + 1, r);
    }
  } else {
    int x = rep(i + 1, r);
    if (x || v[0] == 0) {
      return x;
    } else {
      return rep(l, i - 1);
    }
  }
}

int find_best(int n) {
  return rep(0, n - 1);
}

• Subtask 1: 20 / 20
• Subtask 2: 0 / 80