Submission #668530

#	Time	Username	Problem	Language	Result	Execution time	Memory
668530		hoanghq2004	Rarest Insects (IOI22_insects)	C++17	Compilation error	0 ms	0 KiB

insects

#include <bits/stdc++.h>
#pragma GCC optimize ("O3")
#pragma GCC optimize ("unroll-loops")
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include "insects.h"

using namespace __gnu_pbds;
using namespace std;

template <typename T>
using ordered_set = tree <T, null_type, less <T>, rb_tree_tag, tree_order_statistics_node_update>;



static inline constexpr int kMaxQueries = 40000;

static int N;
// Insect types are compressed to colors in the range [0, N).
static std::vector<int> color;
static std::vector<bool> in_box;

static std::vector<int> color_occurrences;
static std::multiset<int> max_occurrences;

static std::vector<int> op_counter(3, 0);

static inline void protocol_violation(std::string message) {
  printf("Protocol Violation: %s\n", message.c_str());
  exit(0);
}

void move_inside(int i) {
  if (i < 0 || i >= N) {
    protocol_violation("invalid parameter");
  }
  ++op_counter[0];
  if (op_counter[0] > kMaxQueries) {
    protocol_violation("too many calls");
  }
  if (!in_box[i]) {
    in_box[i] = true;
    max_occurrences.erase(max_occurrences.find(color_occurrences[color[i]]));
    ++color_occurrences[color[i]];
    max_occurrences.insert(color_occurrences[color[i]]);
  }
}

void move_outside(int i) {
  if (i < 0 || i >= N) {
    protocol_violation("invalid parameter");
  }
  ++op_counter[1];
  if (op_counter[1] > kMaxQueries) {
    protocol_violation("too many calls");
  }
  if (in_box[i]) {
    in_box[i] = false;
    max_occurrences.erase(max_occurrences.find(color_occurrences[color[i]]));
    --color_occurrences[color[i]];
    max_occurrences.insert(color_occurrences[color[i]]);
  }
}

int press_button() {
  ++op_counter[2];
  if (op_counter[2] > kMaxQueries) {
    protocol_violation("too many calls");
  }
  return *(max_occurrences.rbegin());
}

int min_cardinality(int n) {
    vector <int> flag(n);
    for (int i = 0; i < n; ++i) {
        move_inside(i);
        if (press_button() == 1) flag[i] = 1;
        else move_outside(i);
    }
    int cnt = 0;
    for (int i = 0; i < n; ++i) if (flag[i]) move_outside(i), ++cnt;
    auto check = [&](int k) {
        vector <int> a;
        for (int i = 0; i < n; ++i)
            if (!flag[i]) {
                move_inside(i);
                if (press_button() >= k) move_outside(i);
                else a.push_back(i);
            }
        int ok = 1;
        for (int i = 0; i < n; ++i) {
            if (flag[i]) {
                move_inside(i);
                int cur = press_button();
                move_outside(i);
                if (cur < k) {
                    ok = 0;
                    break;
                }
            }
        }
        for (auto i: a) move_outside(i);
        return ok;
    };
    int L = 1, R = n / cnt;
    while (L < R) {
        int mid = L + R + 1 >> 1;
        if (check(mid)) L = mid;
        else R = mid - 1;
    }
    return L;
}


int main() {
  assert(1 == scanf("%d", &N));
  color.resize(N);
  in_box.assign(N, false);

  std::map<int, int> type_to_color;
  for (int i = 0; i < N; ++i) {
    int Ti;
    assert(1 == scanf("%d", &Ti));
    if (type_to_color.find(Ti) == type_to_color.end()) {
      int new_color = type_to_color.size();
      type_to_color[Ti] = new_color;
      max_occurrences.insert(0);
    }
    color[i] = type_to_color[Ti];
  }

  color_occurrences.assign(type_to_color.size(), 0);

  int answer = min_cardinality(N);
  int Q = *std::max_element(op_counter.begin(), op_counter.end());
  printf("%d\n", answer);
  printf("%d\n", Q);
  return 0;
}

Compilation message (stderr)

insects.cpp: In function 'int min_cardinality(int)':
insects.cpp:107:25: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  107 |         int mid = L + R + 1 >> 1;
      |                   ~~~~~~^~~
/usr/bin/ld: /tmp/ccJrBScK.o: in function `move_inside(int)':
stub.cpp:(.text+0x0): multiple definition of `move_inside(int)'; /tmp/cc0fv1zK.o:insects.cpp:(.text+0x290): first defined here
/usr/bin/ld: /tmp/ccJrBScK.o: in function `move_outside(int)':
stub.cpp:(.text+0xe0): multiple definition of `move_outside(int)'; /tmp/cc0fv1zK.o:insects.cpp:(.text+0x510): first defined here
/usr/bin/ld: /tmp/ccJrBScK.o: in function `press_button()':
stub.cpp:(.text+0x1c0): multiple definition of `press_button()'; /tmp/cc0fv1zK.o:insects.cpp:(.text+0x200): first defined here
/usr/bin/ld: /tmp/ccJrBScK.o: in function `main':
stub.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/cc0fv1zK.o:insects.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status