Submission #990408

#	Time	Username	Problem	Language	Result	Execution time	Memory
990408		amine_aroua	Broken Device (JOI17_broken_device)	C++17	100 / 100	29 ms	2608 KiB

Anna

#include "Annalib.h"
#include<bits/stdc++.h>
using namespace std;
#define fore(i , n ) for(int i = 0 ; i < n; i++)
void Anna( int N, long long X, int K, int P[] )
{
    srand(6661);
    vector<int> final(N , 0);
    vector<bool> forbidden(N , 0);
    vector<int> seq(N);
    fore(i , N)
        seq[i] = i;
    random_shuffle(seq.begin() , seq.end());
    fore(i , K)
        forbidden[P[i]] = 1;
    for(int i = 0 ;i + 1< N;i+=2)
    {
        int cur = X%3;
        if(forbidden[seq[i]] == 1 && forbidden[seq[i + 1]] == 1)
            continue;
        if(forbidden[seq[i]] && (cur == 0 || cur == 2))
            continue;
        if(forbidden[seq[i + 1]] && (cur == 1 || cur == 2))
            continue;
        X/=3;
        if(cur == 0)
            final[seq[i]] = 1;
        else if(cur == 1)
            final[seq[i + 1]] = 1;
        else
            final[seq[i]] = final[seq[i + 1]] = 1;
    }
    fore(i , N)
        Set(i , final[i]);
}

Bruno

#include "Brunolib.h"
#include <bits/stdc++.h>
#define pb push_back
#define Int long long
#define fore(i , n ) for(int i = 0 ; i < n; i++)
using namespace std;
long long Bruno( int N, int A[] ){
    srand(6661);
    vector<int> seq(N);
    fore(i , N)
        seq[i] = i;
    random_shuffle(seq.begin() , seq.end());
    vector<int> po;
    for(int i = 0 ;i + 1 < N ; i+=2)
    {
        if(A[seq[i]] == 1 && A[seq[i + 1]] == 1)
            po.pb(2);
        else if(A[seq[i]] == 1)
            po.pb(0);
        else if(A[seq[i + 1]] == 1)
            po.pb(1);
    }
    reverse(po.begin() , po.end());
    Int X = 0;
    for(auto x : po)
        X = 3*X + x;
    return X;
}

• Subtask 1: 100 / 100