oj.uz

Submission #72819

# Submission time Handle Problem Language Result Execution time Memory
72819 2018-08-27T03:24:23 Z funcsr The Big Prize (IOI17_prize) C++17
20 / 100
 78 ms 572 KB 
#include "prize.h"
#include <iostream>
#include <vector>
#include <algorithm>
#include <queue>
#include <cmath>
#include <cassert>
#include <random>
using namespace std;
#define rep(i,n)for (int i=0; i<(n); i++)
#define all(x) (x).begin(), (x).end()
#define pb push_back
#define _1 first
#define _2 second
#define INF 1145141919
#define ret(x) {int cache=(x);if(cache!=-1)return cache;}
typedef pair<int, int> P;
mt19937 mt_rand(114514);
int mp = 0;

int solve(int l, int r, int num, int left) {
  if (num == 0) return -1;
  int mid = (l+r)/2;
  for (; mid>=l; mid--) {
    vector<int> ret = ask(mid);
    if (ret[0]+ret[1] == 0) return mid;
    if (ret[0]+ret[1] != mp) continue;
    if (mid > l) {
      ret(solve(l, mid-1, ret[0]-left, left));
    }
    if (mid < r) {
      ret(solve(mid+1, r, num-ret[0], left+ret[0]));
    }
  }
  return -1;
}

int find_best(int N) {
  rep(i, 30) {
    vector<int> ret = ask(mt_rand()%N);
    mp = max(mp, ret[0]+ret[1]);
  }
  assert(mp < 500);
  return solve(0, N-1, mp, 0);
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 248 KB Output is correct
2 Correct 2 ms 312 KB Output is correct
3 Correct 2 ms 372 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 3 ms 428 KB Output is correct
6 Correct 2 ms 456 KB Output is correct
7 Correct 2 ms 456 KB Output is correct
8 Correct 2 ms 512 KB Output is correct
9 Correct 2 ms 524 KB Output is correct
10 Correct 2 ms 524 KB Output is correct

Subtask #2
0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 524 KB Output is correct
2 Correct 4 ms 572 KB Output is correct
3 Correct 4 ms 572 KB Output is correct
4 Correct 4 ms 572 KB Output is correct
5 Correct 3 ms 572 KB Output is correct
6 Correct 4 ms 572 KB Output is correct
7 Correct 2 ms 572 KB Output is correct
8 Correct 2 ms 572 KB Output is correct
9 Correct 2 ms 572 KB Output is correct
10 Correct 3 ms 572 KB Output is correct
11 Incorrect 78 ms 572 KB Incorrect
12 Halted 0 ms 0 KB -