Submission #131738

#	Time	Username	Problem	Language	Result	Execution time	Memory
131738		zoooma13	Broken Device (JOI17_broken_device)	C++14	100 / 100	55 ms	3312 KiB

Anna

#include "bits/stdc++.h"
#include "Annalib.h"
using namespace std;

vector <int> tobase3(long long x){
    vector <int> ret;
    for( ; x; x/=3)
        ret.push_back(x%3);
    return ret;
}
pair<int ,int> en(int num){
    if(num == 2) return {1 ,1};
    if(num == 1) return {1 ,0};
    return {0 ,1};
}

void Anna( int N, long long X, int K, int P[] ){
    srand(456132);
    vector <int> ord(N);
    iota(ord.begin() ,ord.end() ,0);
    random_shuffle(ord.begin() ,ord.end());

    vector <bool> bad(N, false);
    for(int i=0; i<K; i++)
        bad[P[i]] = true;

    vector <int> enc(N ,0) ,bs3 = tobase3(X);
    for(int j=0 ,i=0; i<N && j<bs3.size(); i+=2){
        auto d = en(bs3[j]);
        if((!bad[ord[i]] || !d.first) && (!bad[ord[i+1]] || !d.second)){
            enc[ord[i]] = d.first;
            enc[ord[i+1]] = d.second;
            j++;
        }
    }

    for(int i=0; i<N; i++)
        Set(i ,enc[i]);
}

Bruno

#include "bits/stdc++.h"
#include "Brunolib.h"
using namespace std;

int de(pair<int ,int> p){
    return p.first+p.second == 2 ? 2 : p.first;
}

long long Bruno( int N, int A[] ){
    srand(456132);
    vector <int> ord(N);
    iota(ord.begin() ,ord.end() ,0);
    random_shuffle(ord.begin() ,ord.end());

    long long X = 0LL ,pw = 1LL;
    for(int i=0; i<N; i+=2)
        if(A[ord[i]] || A[ord[i+1]]){
            X += pw*de({A[ord[i]] ,A[ord[i+1]]});
            pw *= 3;
        }

    return X;
}

Compilation message (stderr)

Anna.cpp: In function 'void Anna(int, long long int, int, int*)':
Anna.cpp:28:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int j=0 ,i=0; i<N && j<bs3.size(); i+=2){
                              ~^~~~~~~~~~~

• Subtask 1: 100 / 100