Submission #239599

#	Time	Username	Problem	Language	Result	Execution time	Memory
239599		nicolaalexandra	Unscrambling a Messy Bug (IOI16_messy)	C++14	0 / 100	5 ms	384 KiB

messy

#include <bits/stdc++.h>
#include "messy.h"
#define DIM 300
using namespace std;

string a[DIM],s;
int k,n,w,r,pas;
int p[DIM],v[DIM];
vector <int> sol;

/*void add_element(string s){
    a[++k] = s;
}

void compile_set(){
    for (int i=1;i<=k;i++){
        string s = "";
        for (int j=0;j<n;j++)
            s += a[i][p[j]];
        a[i] = s;
    }
}

int check_element(string s){
    pas++;
    for (int i=1;i<=k;i++)
        if (a[i] == s)
            return 1;
    return 0;
}*/

void add (int st, int dr){
    if (st == dr)
        return;
    int mid = (st+dr)>>1;

    string s = "";
    for (int i=0;i<n;i++){
        if (i < st || i > dr)
            s += "1";
        else s += "0";
    }

    for (int i=st;i<=mid;i++){
        s[i] = '1';
        add_element(s);
        s[i] = '0';
    }

    add (st,mid);
    add (mid+1,dr);

}

void solve (string s, int st, int dr){
    if (st == dr){
        for (int i=0;i<n;i++){
            if (s[i] == '0'){
                sol[i] = st;
                break;
            }}
        return;
    }

    int mid = (st+dr)>>1;

    vector <int> poz,poz2;
    for (int i=0;i<=n-1;i++){
        if (s[i] == '1')
            continue;
        s[i] = '1';
        if (check_element(s) == 0)
            poz.push_back(i);
        else poz2.push_back(i);

        s[i] = '0';
    }

    for (auto it : poz)
        s[it] = '1';

    solve (s,st,mid);

    for (auto it : poz)
        s[it] = '0';
    for (auto it : poz2)
        s[it] = '1';

    solve (s,mid+1,dr);

}

vector<int> restore_permutation (int n, int w, int r){
    int i,j;

    add (0,n-1);

    compile_set();

    s = "";
    for (i=0;i<n;i++){
        sol.push_back(0);
        s += "0";
    }

    solve (s,0,n-1);

    /*for (i=0;i<n;i++){
        s += "0";
        sol.push_back(-1);
        v[i] = i;
    }

    random_shuffle (v,v+n);

    for (i=0;i<n;i++){
        for (j=0;j<n;j++){
            int bit = v[j];
            if (s[bit] == '1')
                continue;
            /// incerc sa pun 1 aici
            s[bit] = '1';
            if (j == n-1 || check_element(s)){
                sol[bit] = i;
                break;
            } else s[bit] = '0';
        }
    }

    for (i=0;i<n;i++){
        if (sol[i] == -1){
            sol[i] = n-1;
            break;
        }}
    */

    return sol;
}

Compilation message (stderr)

messy.cpp: In function 'std::vector<int> restore_permutation(int, int, int)':
messy.cpp:94:11: warning: unused variable 'j' [-Wunused-variable]
     int i,j;
           ^

• Subtask 1: 0 / 20
• Subtask 2: 0 / 18
• Subtask 3: 0 / 11
• Subtask 4: 0 / 21
• Subtask 5: 0 / 30