oj.uz

Submission #917603

# Submission time Handle Problem Language Result Execution time Memory
917603 2024-01-28T13:12:46 Z nguyentunglam Scales (IOI15_scales) C++17
72.0238 / 100
 495 ms 856 KB 
#include "scales.h"
#include<bits/stdc++.h>
using namespace std;

mt19937 rng(1);

int n = 6;

int order[10];

vector<tuple<int, int, int> > three;
vector<tuple<int, int, int, int> > four;

void init(int T) {
  for(int a = 1; a <= n; a++) for(int b = a + 1; b <= n; b++) for(int c = b + 1; c <= n; c++) {
    three.emplace_back(a, b, c);
  }
  for(int d = 1; d <= n; d++) for(int a = 1; a <= n; a++) for(int b = a + 1; b <= n; b++) for(int c = b + 1; c <= n; c++) {
    if (d != a && d != b && d != c) {
      four.emplace_back(a, b, c, d);
    }
  }
}

int ask_three(int a, int b, int c, int type, vector<int> tmp) {
  order[1] = a; order[2] = b; order[3] = c;
  sort(order + 1, order + 4, [&] (const int &x, const int &y) {
       return tmp[x] < tmp[y];
       });
  return order[type];
}

int ask_four(int a, int b, int c, int d, vector<int> tmp) {
  int ret = 0;
  tmp[0] = 1e9;
  if (tmp[a] > tmp[d] && tmp[a] < tmp[ret]) ret = a;
  if (tmp[b] > tmp[d] && tmp[b] < tmp[ret]) ret = b;
  if (tmp[c] > tmp[d] && tmp[c] < tmp[ret]) ret = c;
  if (ret == 0) return ask_three(a, b, c, 1, tmp);
  return ret;
}

void orderCoins() {
//  shuffle(three.begin(), three.end(), rng);
//  shuffle(four.begin(), four.end(), rng);
  vector<vector<int> > p;

  for(int i = 1; i <= n; i++) order[i] = i;

  do {
    vector<int> tmp(n + 1);
    for(int i = 1; i <= n; i++) tmp[i] = order[i];
    p.push_back(tmp);
  } while (next_permutation(order + 1, order + n + 1));

  while (p.size() > 1) {
    int best = 1e9;
    int _a, _b, _c, _d, _t;

    for(auto &[a, b, c, d] : four) {
      int worst = 0;
      for(int result = 1; result <= n; result++) {
        int sat = 0;
        for(auto &tmp : p) sat += result == ask_four(a, b, c, d, tmp);
        if (sat) worst = max(worst, sat);
      }
      if (!worst) continue;
      if (best > worst) {
        best = worst;
        _a = a;
        _b = b;
        _c = c;
        _d = d;
        _t = 0;
      }
    }

    for(auto &[a, b, c] : three) for(int type = 3; type >= 1; type--) {
      int worst = 0;
      for(int result = 1; result <= n; result++) {
        int sat = 0;
        for(auto &tmp : p) sat += result == ask_three(a, b, c, type, tmp);
        if (sat) worst = max(worst, sat);
      }
      if (!worst) continue;
      if (best > worst) {
        best = worst;
        _a = a;
        _b = b;
        _c = c;
        _t = type;
      }
    }

//    if (best == p.size()) break;
    assert(best < p.size());

    #ifdef ngu
    cout << _a << " " << _b << " " << _c << " " << _d << " " << _t << endl;
    #endif // ngu

    int result = 0;
    vector<vector<int> > _p;
    if (_t) {
      if (_t == 1) result = getLightest(_a, _b, _c);
      if (_t == 2) result = getMedian(_a, _b, _c);
      if (_t == 3) result = getHeaviest(_a, _b, _c);
      for(auto &tmp : p) if (ask_three(_a, _b, _c, _t, tmp) == result) {
        _p.push_back(tmp);
      }
      assert(_p.size() < p.size());
      p = _p;
    }

    else {
      result = getNextLightest(_a, _b, _c, _d);
      for(auto &tmp : p) if (ask_four(_a, _b, _c, _d, tmp) == result) {
        _p.push_back(tmp);
      }
      assert(_p.size() < p.size());
      p = _p;
    }
  }

  vector<int> tmp = p.back();
  int hidden[n];
  for(int i = 1; i <= n; i++) hidden[tmp[i] - 1] = i;
  #ifdef ngu
  for(int i = 0; i < n; i++) cerr << hidden[i] << " ";
  #endif // ngu

  answer(hidden);
}

Compilation message

scales.cpp: In function 'void init(int)':
scales.cpp:14:15: warning: unused parameter 'T' [-Wunused-parameter]
   14 | void init(int T) {
      |           ~~~~^
In file included from /usr/include/c++/10/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:33,
                 from scales.cpp:2:
scales.cpp: In function 'void orderCoins()':
scales.cpp:96:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   96 |     assert(best < p.size());
      |            ~~~~~^~~~~~~~~~
scales.cpp:105:7: warning: '_t' may be used uninitialized in this function [-Wmaybe-uninitialized]
  105 |       if (_t == 1) result = getLightest(_a, _b, _c);
      |       ^~
scales.cpp:117:38: warning: '_d' may be used uninitialized in this function [-Wmaybe-uninitialized]
  117 |       for(auto &tmp : p) if (ask_four(_a, _b, _c, _d, tmp) == result) {
      |                              ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
scales.cpp:107:40: warning: '_c' may be used uninitialized in this function [-Wmaybe-uninitialized]
  107 |       if (_t == 3) result = getHeaviest(_a, _b, _c);
      |                             ~~~~~~~~~~~^~~~~~~~~~~~
scales.cpp:107:40: warning: '_b' may be used uninitialized in this function [-Wmaybe-uninitialized]
scales.cpp:107:40: warning: '_a' may be used uninitialized in this function [-Wmaybe-uninitialized]

Subtask #1
72.02381 / 100.0

# Verdict Execution time Memory Grader output
1 Partially correct 460 ms 508 KB Output is partially correct
2 Partially correct 495 ms 508 KB Output is partially correct
3 Partially correct 479 ms 600 KB Output is partially correct
4 Partially correct 462 ms 508 KB Output is partially correct
5 Partially correct 470 ms 504 KB Output is partially correct
6 Correct 474 ms 504 KB Output is correct
7 Partially correct 467 ms 500 KB Output is partially correct
8 Partially correct 460 ms 348 KB Output is partially correct
9 Partially correct 460 ms 504 KB Output is partially correct
10 Partially correct 462 ms 744 KB Output is partially correct
11 Partially correct 461 ms 516 KB Output is partially correct
12 Partially correct 462 ms 348 KB Output is partially correct
13 Partially correct 459 ms 504 KB Output is partially correct
14 Correct 463 ms 344 KB Output is correct
15 Partially correct 459 ms 596 KB Output is partially correct
16 Partially correct 464 ms 592 KB Output is partially correct
17 Partially correct 452 ms 348 KB Output is partially correct
18 Partially correct 469 ms 508 KB Output is partially correct
19 Partially correct 454 ms 500 KB Output is partially correct
20 Partially correct 458 ms 492 KB Output is partially correct
21 Partially correct 462 ms 508 KB Output is partially correct
22 Partially correct 453 ms 504 KB Output is partially correct
23 Partially correct 465 ms 504 KB Output is partially correct
24 Partially correct 460 ms 344 KB Output is partially correct
25 Partially correct 455 ms 348 KB Output is partially correct
26 Partially correct 466 ms 600 KB Output is partially correct
27 Partially correct 469 ms 504 KB Output is partially correct
28 Partially correct 464 ms 344 KB Output is partially correct
29 Partially correct 458 ms 504 KB Output is partially correct
30 Partially correct 455 ms 344 KB Output is partially correct
31 Partially correct 475 ms 500 KB Output is partially correct
32 Partially correct 464 ms 508 KB Output is partially correct
33 Partially correct 462 ms 348 KB Output is partially correct
34 Partially correct 471 ms 500 KB Output is partially correct
35 Partially correct 461 ms 344 KB Output is partially correct
36 Partially correct 459 ms 856 KB Output is partially correct
37 Partially correct 457 ms 508 KB Output is partially correct
38 Partially correct 473 ms 504 KB Output is partially correct
39 Partially correct 466 ms 512 KB Output is partially correct
40 Partially correct 464 ms 500 KB Output is partially correct