Submission #1077331

#	Time	Username	Problem	Language	Result	Execution time	Memory
1077331		AMO5	Broken Device (JOI17_broken_device)	C++17	0 / 100	2 ms	860 KiB

Anna

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

void Anna( int N, long long X, int K, int P[] ){
    std::vector<int>bad(N, 0);
    for(int i=0; i<K; i++)bad[P[i]]=1;

    auto setBlock=[&](int index, int a, int b, int c)->void{
        Set(index, a);
        Set(index+1, b);
        Set(index+2, c);
    };

    long long tmp = X;
    for(int i=0; i<N; i+=3){
        int cnt = bad[i] + bad[i+1] + bad[i+2];
        if(tmp == 0 || cnt >= 2){
            setBlock(i, 0, 0, 0);
        }else if(cnt == 0){
            int bit = tmp % 4;
            tmp /= 4;
            if(bit == 2){
                setBlock(i, 0, 1, 1);
            }else{
                setBlock(i, 1, tmp/2, tmp%2);
            }
        }else{
            int bit = tmp % 2;
            tmp /= 2;
            if(bad[i]){
                if(bit == 0) setBlock(i, 0, 1, 0);
                else setBlock(i, 0, 0, 1);
            }else if(bad[i+1]){
                if(bit == 0){
                    int bit2 = tmp % 2;
                    tmp /= 2;
                    if(bit2 == 0) setBlock(i, 1, 0, 0);
                    else setBlock(i, 1, 0, 1);
                }
                else setBlock(i, 0, 0, 1);
            }else{
                if(bit == 0) setBlock(i, 0, 1, 0);
                else setBlock(i, 1, 1, 0);
            }
        }
    }
}

Bruno

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

long long Bruno( int N, int A[] ){
    std::vector<int>bits;
    for(int i=0; i<N; i+=3){
        int val = 4 * A[i] + 2 * A[i+1] + A[i+2];
        if(val == 0)continue;
        if(val == 1) bits.emplace_back(1);
        else if(val == 2) bits.emplace_back(0);
        else if(val == 3) bits.emplace_back(1), bits.emplace_back(0);
        else if(val == 4) bits.emplace_back(0), bits.emplace_back(0);
        else if(val == 5) bits.emplace_back(0), bits.emplace_back(1);
        else if(val == 6) bits.emplace_back(0);
        else bits.emplace_back(1), bits.emplace_back(1);
    }
    long long answer = 0LL;
    while(!bits.empty()){
        answer *= 2LL;
        answer += bits.back();
        bits.pop_back();
    }
    return answer;
}

• Subtask 1: 0 / 100