Submission #411619

#	Time	Username	Problem	Language	Result	Execution time	Memory
411619		nxteru	Unscrambling a Messy Bug (IOI16_messy)	C++14	100 / 100	3 ms	460 KiB

messy

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

vector<int>ans;
void add(vector<int>x,string s){
    if(x.size()==1)return;
    vector<int>a,b;
    for(int i=0;i<x.size()/2;i++)a.push_back(x[i]);
    for(int i=x.size()/2;i<x.size();i++)b.push_back(x[i]);
    for(auto i:a){
        s[i]='1';
        add_element(s);
        s[i]='0';
    }
    for(auto i:b)s[i]='1';
    add(a,s);
    for(auto i:b)s[i]='0';
    for(auto i:a)s[i]='1';
    add(b,s);
}
void check(vector<int>x,string s,int l,int r){
    if(x.size()==1){
        ans[x[0]]=l;
        return;
    }
    int m=(l+r)/2;
    vector<int>a,b;
    for(auto i:x){
        s[i]='1';
        if(check_element(s))a.push_back(i);
        else b.push_back(i);
        s[i]='0';
    }
    for(auto i:b)s[i]='1';
    check(a,s,l,m);
    for(auto i:b)s[i]='0';
    for(auto i:a)s[i]='1';
    check(b,s,m,r);
}
vector<int> restore_permutation(int n, int w, int r) {
    string s;
    for(int i=0;i<n;i++)s+='0';
    vector<int>x;
    for(int i=0;i<n;i++)x.push_back(i);
    add(x,s);
    compile_set();
    ans.resize(n);
    check(x,s,0,n);
    return ans;
}

Compilation message (stderr)

messy.cpp: In function 'void add(std::vector<int>, std::string)':
messy.cpp:9:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |     for(int i=0;i<x.size()/2;i++)a.push_back(x[i]);
      |                 ~^~~~~~~~~~~
messy.cpp:10:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |     for(int i=x.size()/2;i<x.size();i++)b.push_back(x[i]);
      |                          ~^~~~~~~~~

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