Submission #1078755

#	Time	Username	Problem	Language	Result	Execution time	Memory
1078755		LittleOrange	Prisoner Challenge (IOI22_prison)	C++17	10 / 100	1 ms	604 KiB

prison

#include "prison.h"

#include <vector>
#include<bits/stdc++.h>
using namespace std;
using ll = int;

std::vector<std::vector<int>> devise_strategy(int N) {
  ll n = N;
  ll lvl = __lg(n)+1;
  ll x = lvl*2+3;
  vector<vector<ll>> ret;
  vector<ll> mp;
  {
    vector<ll> a(n+1,0);
    for(ll i = 1;i<=n;i++) a[i] = (i>>lvl&1)?1:2;
    ret.push_back(a);
  }
  for(ll j = 0;j<=12;j++){
    ll h = lvl-j;
    ll tp = j&1^1;
    {
      vector<ll> a(n+1,tp);
      for(ll i = 1;i<=n;i++){
        if (i>>h&1) a[i] = min(x,((i<<1>>h&1)?1:2)+j*2+2);
        else a[i] = -1-tp;
      }
      ret.push_back(a);
    }
    {
      vector<ll> a(n+1,tp);
      for(ll i = 1;i<=n;i++){
        if (i>>h&1^1) a[i] = min(x,((i<<1>>h&1)?1:2)+j*2+2);
        else a[i] = -2+tp;
      }
      ret.push_back(a);
    }
  }
  //cerr << ret.size() << "\n";
  //for(auto &o : ret){
  //  for(ll i = 0;i<=n;i++) cerr << o[i] << " \n"[i+1==n];
  //}
  return ret;
}

Compilation message (stderr)

prison.cpp: In function 'std::vector<std::vector<int> > devise_strategy(int)':
prison.cpp:21:14: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
   21 |     ll tp = j&1^1;
      |             ~^~
prison.cpp:33:17: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
   33 |         if (i>>h&1^1) a[i] = min(x,((i<<1>>h&1)?1:2)+j*2+2);
      |             ~~~~^~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 0 / 90