Submission #1040938

#	Time	Username	Problem	Language	Result	Execution time	Memory
1040938		vjudge1	Unscrambling a Messy Bug (IOI16_messy)	C++17	100 / 100	2 ms	628 KiB

messy

#include "messy.h"

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

#define pb push_back

vector<int>ans;

int N;

void insertion(int l,int r){
    if(l==r)return;
    int mid=(l+r)>>1;
    string s=string(N,'0');
    for(int i=l;i<=r;i++)s[i]='1';
    for(int i=l;i<=mid;i++){
        s[i]='0';
        add_element(s);
        s[i]='1';
    }
    insertion(l,mid),insertion(mid+1,r);
}

bool dontcare[128];

void finding(int l,int r){
    if(l==r){
        for(int i=0;i<N;i++){
            if(!dontcare[i]){
                ans[i]=l;
                break;
            }
        }
        return;
    }
    int mid=(l+r)>>1;
    vector<int>firsthalf,secondhalf;
    int mxsz=mid-l+1;
    string s=string(N,'0');
    for(int i=0;i<N;i++){
        if(!dontcare[i]){
            s[i]='1';
        }
    }
    for(int i=0;i<N;i++){
        if(!dontcare[i]){
            if(firsthalf.size()==mxsz){
                secondhalf.pb(i);
            }
            else if(secondhalf.size()==mxsz){
                firsthalf.pb(i);
            }else{
                s[i]='0';
                bool res=check_element(s);
                if(res){
                    firsthalf.pb(i);
                }else{
                    secondhalf.pb(i);
                }
                s[i]='1';
            }
        }
    }
    for(int i:secondhalf){
        dontcare[i]=1;
    }
    finding(l,mid);
    for(int i:firsthalf){
        dontcare[i]=1;
    }
    for(int i:secondhalf){
        dontcare[i]=0;
    }
    finding(mid+1,r);
    for(int i:firsthalf){
        dontcare[i]=0;
    }
}

std::vector<int> restore_permutation(int n, int w, int r) {
    N=n;
    insertion(0,n-1);
    compile_set();
    ans=vector<int>(n);
    memset(dontcare,0,sizeof(dontcare));
    finding(0,n-1);
    return ans;
}

Compilation message (stderr)

messy.cpp: In function 'void finding(int, int)':
messy.cpp:48:32: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   48 |             if(firsthalf.size()==mxsz){
      |                ~~~~~~~~~~~~~~~~^~~~~~
messy.cpp:51:38: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   51 |             else if(secondhalf.size()==mxsz){
      |                     ~~~~~~~~~~~~~~~~~^~~~~~

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