제출 #65301

#제출 시각아이디문제언어결과실행 시간메모리
65301FedericoSUnscrambling a Messy Bug (IOI16_messy)C++14
70 / 100
4 ms512 KiB
#include <vector>
#include <iostream>
#include <assert.h>
#include "messy.h"
using namespace std;

int P[200];
int N;

void inserimento(string s){
    //cout<<"ins "<<s<<endl;
    add_element(s);
}

bool controllo(string s){
    bool f=check_element(s);
    //cout<<"con "<<s<<" "<<f<<endl;
    return f;
}

void crea(int a, int b){

    if(a==b)
        return;

    string s(N,'0');

    for(int i=0;i<a;i++)
        s[i]='1';
    for(int i=b+1;i<N;i++)
        s[i]='1';

    s[a]='1';
    inserimento(s);
    for(int i=a+1;i<=(a+b)/2;i++){
        s[i]='1';
        inserimento(s);
        s[i]='0';
    }

    crea(a,(a+b)/2);
    crea((a+b)/2+1,b);

}

void cerca(string S, int a, int b){

    int pos=-1;
    vector<int> X,Y;

    for(int i=0;i<N;i++)
        if(S[i]=='0'){
            S[i]='1';
            if(controllo(S)){
                pos=i;
                X.push_back(i);
                break;
            }
            S[i]='0';
        }

    assert(pos!=-1);

    for(int i=0;i<N;i++)
        if(S[i]=='0'){
            S[i]='1';
            if(controllo(S))
                X.push_back(i);
            else
                Y.push_back(i);
            S[i]='0';
        }

    assert(X.size()==Y.size());
    if(X.size()==1){
        P[X[0]]=a;
        P[Y[0]]=b;
    }
    else{
        string A(N,'1'),B(N,'1');

        for(int i:X)
            A[i]='0';
        cerca(A,a,(a+b)/2);

        for(int i:Y)
            B[i]='0';
        cerca(B,(a+b)/2+1,b);
    }


}

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

    N=n;

    crea(0,N-1);
    compile_set();
    string v(N,'0');
    cerca(v,0,N-1);

    vector<int> ans(N);
    for(int i=0;i<N;i++)
        ans[i]=P[i];

    return ans;

}
/*
32 320 1024
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
*/
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