Submission #630157

#	Time	Username	Problem	Language	Result	Execution time	Memory
630157		nextgenxing	Rarest Insects (IOI22_insects)	C++17	0 / 100	6 ms	208 KiB

insects

#include <bits/stdc++.h>
#include "insects.h"
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
#define F0R(i, n) for(int i = 0; i < (n); i++)
#define FOR(i, a, b) for(int i = (a); i < (b); i++)
#define F0Rd(i, n) for(int i = (n)-1; i >= 0; i--)
#define FORd(i, a, b) for(int i = (b)-1; i >= (a); i--)
#define ff first 
#define ss second 
const int MAX_N = 2e5+5;
const ll MOD = 1e9+7;

//#define LOCAL
#ifdef LOCAL

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());
}

#endif


int n, colors;

bool check(int x){
    vector<int> inserted;
    F0R(i, n){
        move_inside(i);
        if(press_button() > x) move_outside(i);
        else inserted.push_back(i);
    }
    int num1 = inserted.size();
    for(auto x : inserted) move_outside(x);
    if(num1 == x*colors) return true;
    else return false;
}

int min_cardinality(int N){
    n = N;
    vector<int> inserted, non;
    F0R(i, n){
        move_inside(i);
        if(press_button() > 1) move_outside(i), non.push_back(i);
        else inserted.push_back(i);
    }
    colors = inserted.size();
    inserted.clear();
    bool f = 0;
    int l = 0, r = n+1;
    while(l+1 < r){
        int m = (l+r)/2;
        if(!f){
            vector<int> b;
            inserted.clear();
            for(auto x : non){
                move_inside(x);
                if(press_button() > m) move_outside(x), b.push_back(x);
                else inserted.push_back(x);
            }
            non = b;
        } else{
            non.clear();
            for(auto x : inserted) move_outside(x);
            vector<int> a;
            for(auto x : inserted){
                move_inside(x);
                if(press_button() > m) move_outside(x), non.push_back(x);
                else a.push_back(x);
            }
            inserted = a;
        }
        int num1 = inserted.size();
        if(num1 == (m-1)*colors) l = m, f = 0;
        else r = m, f = 1;
    }
    return l;
}

#ifdef LOCAL
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;
}
#endif

• Subtask 1: 0 / 10
• Subtask 2: 0 / 15
• Subtask 3: 0 / 75