Submission #780628

#	Time	Username	Problem	Language	Result	Execution time	Memory
780628		sofija6	Unscrambling a Messy Bug (IOI16_messy)	C++14	100 / 100	2 ms	468 KiB

messy

#include <bits/stdc++.h>
#include "messy.h"
using namespace std;
void Add(int l,int r,int n)
{
    if (l==r)
        return;
    string s="";
    for (int i=0;i<n;i++)
        s+='0';
    for (int i=0;i<l;i++)
        s[i]='1';
    for (int i=r+1;i<n;i++)
        s[i]='1';
    for (int i=l;i<=(l+r)/2;i++)
    {
        s[i]='1';
        add_element(s);
        s[i]='0';
    }
    Add(l,(l+r)/2,n);
    Add((l+r)/2+1,r,n);
}
vector<int> ans;
void Solve(int l,int r,int n,set<int> pos)
{
    if (l==r)
    {
        ans[*pos.begin()]=l;
        return;
    }
    string s;
    for (int i=0;i<n;i++)
    {
        if (!pos.count(i))
            s+='1';
        else
            s+='0';
    }
    set<int> pos1,pos2;
    for (auto i : pos)
    {
        s[i]='1';
        if (check_element(s))
        {
            pos1.insert(i);
            if (pos1.size()==(l+r+1)/2)
                break;
        }
        s[i]='0';
    }
    for (auto i : pos)
    {
        if (!pos1.count(i))
            pos2.insert(i);
    }
    Solve(l,(l+r)/2,n,pos1);
    Solve((l+r)/2+1,r,n,pos2);
}
std::vector<int> restore_permutation(int n, int w, int r) {
    Add(0,n-1,n);
    for (int i=0;i<n;i++)
        ans.push_back(0);
    set<int> s;
    for (int i=0;i<n;i++)
        s.insert(i);
    compile_set();
    Solve(0,n-1,n,s);
    return ans;
}

Compilation message (stderr)

messy.cpp: In function 'void Solve(int, int, int, std::set<int>)':
messy.cpp:47:28: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   47 |             if (pos1.size()==(l+r+1)/2)
      |                 ~~~~~~~~~~~^~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 18 / 18
• Subtask 3: 11 / 11
• Subtask 4: 21 / 21
• Subtask 5: 30 / 30