Submission #904928

#	Time	Username	Problem	Language	Result	Execution time	Memory
904928		nguyentunglam	Super Dango Maker (JOI22_dango3)	C++17	7 / 100	361 ms	684 KiB

dango3

#include "dango3.h"
#include<bits/stdc++.h>

#include <vector>

using namespace std;

mt19937 rng(1);


void Solve(int n, int m) {
  vector<int> p;
  for(int i = 1; i <= n * m; i++) p.push_back(i);
  for(int group = 1; group <= m; group++) {
//    shuffle(p.begin(), p.end(), rng);
    int l = n, r = p.size(), last = 0;
    while (l <= r) {
      int mid = l + r >> 1;
      vector<int> tmp;
      for(int i = 0; i < mid; i++) tmp.push_back(p[i]);
      if (Query(tmp)) {
        r = mid - 1;
        last = mid;
      } else l = mid + 1;
    }
    assert(last);
    vector<int> _p, ans;
    for(int i = last; i < p.size(); i++) _p.push_back(p[i]);
    for(int i = 0; i < last; i++) ans.push_back(p[i]);
    for(int i = 0; i < last; i++) {
      vector<int> _ans;
      for(int &j : ans) if (j != p[i]) _ans.push_back(j);
      if (Query(_ans)) {
        ans = _ans;
        _p.push_back(p[i]);
      }
    }
    p = _p;
    Answer(ans);
  }
}

Compilation message (stderr)

dango3.cpp: In function 'void Solve(int, int)':
dango3.cpp:18:19: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   18 |       int mid = l + r >> 1;
      |                 ~~^~~
dango3.cpp:28:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |     for(int i = last; i < p.size(); i++) _p.push_back(p[i]);
      |                       ~~^~~~~~~~~~

• Subtask 1: 2 / 2
• Subtask 2: 5 / 5
• Subtask 3: 0 / 15
• Subtask 4: 0 / 78