Submission #72702

#	Time	Username	Problem	Language	Result	Execution time	Memory
72702		ikura355	Broken Device (JOI17_broken_device)	C++14	100 / 100	77 ms	3984 KiB

Anna

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

const int maxn = 150 + 5;

int bad[maxn], res[maxn];

void Anna(int N, long long X, int K, int P[]) {
    for(int i=0;i<N;i++) bad[i] = 0;
    for(int i=0;i<K;i++) bad[P[i]] = 1;
    for(int i=0;i<N;i++) res[i] = 0;
    for(int i=0;i<N;i+=3) {
        if(bad[i] + bad[i+1] + bad[i+2] == 0) {
            int val = X%4;
            if(val==0) res[i] = res[i+2] = 1;
            if(val==1) res[i+1] = 1;
            if(val==2) res[i] = res[i+1] = res[i+2] = 1;
            if(val==3) res[i+1] = 1, res[i+2] = 1;
            X /= 4;
        }
        else if(bad[i] + bad[i+1] + bad[i+2] == 1) {
            int val = X%2;
            if(val==0) {
                if(bad[i] || bad[i+1]) res[i+2] = 1;
                if(bad[i+2]) res[i] = res[i+1] = 1;
            }
            if(val==1) {
                if(bad[i+1] || bad[i+2]) {
                    res[i] = 1;
                }
                if(bad[i]) {
                    if(X%4 == 1) res[i+1] = 1;
                    if(X%4 == 3) res[i+1] = 1, res[i+2] = 1;
                    X /= 2;
                }
            }
            X /= 2;
        }
    }
    for(int i=0;i<N;i++) Set(i,res[i]);
}

Bruno

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

long long Bruno(int N, int A[]) {
    long long ans = 0;
    for(int i=N-3;i>=0;i-=3) {
        int x = A[i], y = A[i+1], z = A[i+2];
        int val = x*4 + y*2 + z;
        if(val==1 || val==6) ans = ans*2;
        if(val==4) ans = ans*2 + 1;
        if(val==2) ans = ans*4 + 1;
        if(val==3) ans = ans*4 + 3;
        if(val==5) ans = ans*4;
        if(val==7) ans = ans*4 + 2;
    }
    return ans;
}

• Subtask 1: 100 / 100