Submission #140467

#	Time	Username	Problem	Language	Result	Execution time	Memory
140467		MrBrionix	Unscrambling a Messy Bug (IOI16_messy)	C++14	100 / 100	4 ms	636 KiB

messy

#include <vector>
#include <cstdio>
#include <string>
#include <set>
#include <cstdlib>
#include <iostream>
#include <bits/stdc++.h>
#include "messy.h"

using namespace std;
/*
namespace helper {

    set<string> set_;
    bool compiled = false;
    int n;
    vector<int> p;
    int w;
    int r;

    int read_int() {
        int x;
        cin >> x;
        return x;
    }

}

using namespace helper;


// A convenience function.
int get_p(int i) {
    int ret = p[i];
    return ret;
}



void wa() {
    printf("WA\n");
    exit(0);
}

bool check(const string& x) {
    if ((int)x.length() != n) {
        return false;
    }
    for (int i = 0; i < n; i++) {
        if (x[i] != '0' && x[i] != '1') {
            return false;
        }
    }
    return true;
}

void add_element(string x) {
    
    //cout<<x<<endl;
    if (--w < 0 || compiled || !check(x)) {
        wa();
    }
    set_.insert(x);
}

bool check_element(string x) {
    if (--r < 0 || !compiled || !check(x)) {
        wa();
    }
    return set_.count(x);
}

void compile_set() {
    if (compiled) {
        wa();
    }
    compiled = true;
    set<string> compiledSet;
    string compiledElement = string(n, ' ');
    for (set<string>::iterator it = set_.begin(); it != set_.end(); it++) {
        string s = *it;
        for (int i = 0; i < n; i++) {
            compiledElement[i] = s[get_p(i)];
        }
        compiledSet.insert(compiledElement);
    }
    set_ = compiledSet;
}
*/

vector<int> sol,v[16][200],opz[16][200];
string vuota,s;
int cont;

vector<int> restore_permutation(int n, int w, int r) {
    
    for(int i=0;i<n;i++){
        vuota.push_back('0');
        v[0][0].push_back(i);
    }
    s=vuota;
    
    for(int i=0;v[i][0].size()>1;i++){
        for(int j=0;j<(1<<i);j++){
            for(int z=0;z<(v[i][j].size()/2);z++){
                v[i+1][j*2].push_back(v[i][j][z]);
                v[i+1][j*2+1].push_back(v[i][j][z+(v[i][j].size()/2)]);    
            }
        }
    }
    
    for(int i=0;i<n/2;i++){
        s[i]='1';
        add_element(s);
        s[i]='0';
    }
    
    for(int i=1;v[i][0].size()>1;i++){
        for(int j=0;j<(1<<i);j++){
            s=vuota;
            for(int z=0;z<v[i][(j+1)%(1<<i)].size();z++){
                s[v[i][(j+1)%(1<<i)][z]]='1';    
            }
            
            for(int z=0;z<(v[i][j].size()/2);z++){
                s[v[i][j][z]]='1';
                add_element(s);
                s[v[i][j][z]]='0';
            }
        }
    }
    
    compile_set();
    
    s=vuota;
    
    for(int i=0;i<v[0][0].size();i++){
        s[i]='1';
        if(check_element(s))
            opz[1][0].push_back(i);
        else
            opz[1][1].push_back(i);
        s[i]='0';
    }
    
    cont=1;
    
    //cout<<"a"<<endl;
    
    for(;opz[cont][0].size()>1;cont++){
        for(int j=0;j<(1<<cont);j++){
            s=vuota;
            for(int z=0;z<opz[cont][(j+1)%(1<<cont)].size();z++){
                s[opz[cont][(j+1)%(1<<cont)][z]]='1'; 
                //cout<<z<<" z"<<endl;   
            }
            
            for(int z=0;z<opz[cont][j].size();z++){
                s[opz[cont][j][z]]='1';
                if(check_element(s))
                    opz[cont+1][j*2].push_back(opz[cont][j][z]);
                else
                    opz[cont+1][j*2+1].push_back(opz[cont][j][z]);
                s[opz[cont][j][z]]='0';
            }
            
            //cout<<j<<" j"<<endl;
        }
        //cout<<cont<<endl;
    }
    
    
    sol.resize(n);
    for(int i=0;i<n;i++){
        sol[opz[cont][i][0]]=i;    
    }
    
    return sol;
}
/*
int main() {
    n = read_int();
    w = read_int();
    r = read_int();
    p = vector<int>(n);
    for (int i = 0; i < n; i++) {
        p[i] = read_int();
    }
    vector<int> answer = restore_permutation(n, w, r);
    
    if (answer.size() != n) {
        printf("WA\n");
        return 0;
    }


    printf("%d", answer[0]);

    for (int i = 1; i < n; i++) {
        printf(" %d", answer[i]);
    }
    printf("\n");
    return 0;
}*/

Compilation message (stderr)

messy.cpp: In function 'std::vector<int> restore_permutation(int, int, int)':
messy.cpp:105:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for(int z=0;z<(v[i][j].size()/2);z++){
                         ~^~~~~~~~~~~~~~~~~~~
messy.cpp:121:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for(int z=0;z<v[i][(j+1)%(1<<i)].size();z++){
                         ~^~~~~~~~~~~~~~~~~~~~~~~~~~
messy.cpp:125:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for(int z=0;z<(v[i][j].size()/2);z++){
                         ~^~~~~~~~~~~~~~~~~~~
messy.cpp:137:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<v[0][0].size();i++){
                 ~^~~~~~~~~~~~~~~
messy.cpp:153:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for(int z=0;z<opz[cont][(j+1)%(1<<cont)].size();z++){
                         ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
messy.cpp:158:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for(int z=0;z<opz[cont][j].size();z++){
                         ~^~~~~~~~~~~~~~~~~~~~

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