Submission #830130

#	Time	Username	Problem	Language	Result	Execution time	Memory
830130		Liudas	Unscrambling a Messy Bug (IOI16_messy)	C++17	100 / 100	2 ms	512 KiB

messy

#include <vector>
#include <cstdio>
#include <string>
#include <set>
#include <cstdlib>
#include <iostream>
#include "messy.h"
#include <numeric>
#include <algorithm>
#include <random>
#include <chrono>
using namespace std;
vector<int> ans;
void prec(vector<int> in, vector<int> out){
    if(in.size() % 2) return;
    string s = string(in.size() + out.size(), '0');
    vector<int> l, r, ll = out, rr = out;
    for(int i : out){
        s[i] = '1';
    }
    for(int i = 0; i < in.size()/2; i ++){
        s[in[i]] = '1';
        l.push_back(in[i]);
        r.push_back(in[i+in.size()/2]);
        ll.push_back(in[i]);
        rr.push_back(in[i+in.size()/2]);
        add_element(s);
        s[in[i]] = '0';
    }
    prec(l, rr);
    prec(r, ll);
}
void comp(vector<int> in, vector<int> out, int L){
    if(in.size() % 2){
        ans[in[0]] = L;
        return;
    }
    string s = string(in.size() + out.size(), '0');
    for(int i : out){
        s[i] = '1';
    }
    vector<int> l, r, ll = out, rr = out;
    for(int i : in){
        s[i] = '1';
        if(check_element(s)){
            l.push_back(i);
            ll.push_back(i);
        }
        else{
            r.push_back(i);
            rr.push_back(i);
        }
        s[i] = '0'; 
    }
    comp(l, rr, L);
    comp(r, ll, L + in.size() / 2);
}
vector<int> restore_permutation(int N, int W, int R){
    vector<int> arr(N), brr;
    iota(arr.begin(), arr.end(), 0);
    prec(arr, brr);
    compile_set();
    ans.resize(N);
    comp(arr, brr, 0);
    return ans;
}

Compilation message (stderr)

messy.cpp: In function 'void prec(std::vector<int>, std::vector<int>)':
messy.cpp:21:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |     for(int i = 0; i < in.size()/2; i ++){
      |                    ~~^~~~~~~~~~~~~

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