Submission #991381

#	Time	Username	Problem	Language	Result	Execution time	Memory
991381		onbert	Broken Device (JOI17_broken_device)	C++17	85 / 100	30 ms	2648 KiB

Anna

#include "Annalib.h"
#include <bits/stdc++.h>
using namespace std;
#define int long long
const int m = 37;
const int R[40] = {0, 0, 2, 2, 1, 1, 0, 0, 1, 2, 0, 2, 1, 1, 2, 2, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 1, 2, 2, 0, 1, 1, 0, 2, 2, 2, 2, 1, 0};
 
void Anna(int32_t n, long long X, int32_t k, int32_t p[]){
    int a[n];
    for (int i=0;i<n;i++) a[i] = 1;
    for (int i=0;i<k;i++) a[p[i]] = 0;
    int cur = 0;
    for (int i=0;i<n;i+=2) {
        int val = (X + R[cur]) % 3;
        int x = 1, y = 1;
        if (val==0) x = 0, y = 1;
        if (val==1) x = 1, y = 0;
        if (((!a[i]) && x) || ((!a[i+1]) && y)) {
            a[i] = a[i+1] = 0;
            continue;
        }
        a[i] = x, a[i+1] = y;
        X /= 3;
        cur++;
    }
    // for (int i=0;i<n;i++) cout << a[i]; cout << endl;
    for (int i=0;i<n;i++) Set(i, (int32_t)a[i]);
}

Bruno

#include "Brunolib.h"
#include <bits/stdc++.h>
using namespace std;
#define int long long
const int m = 37;
const int R[40] = {0, 0, 2, 2, 1, 1, 0, 0, 1, 2, 0, 2, 1, 1, 2, 2, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 1, 2, 2, 0, 1, 1, 0, 2, 2, 2, 2, 1, 0};
 
long long Bruno(int32_t n, int32_t a[]){
    int pwr[m+1];
    pwr[0] = 1;
    for (int i=1;i<=m;i++) pwr[i] = pwr[i-1] * 3;
    int x = 0;
    int cur = 0;
    for (int i=0;i<n && cur<=m;i+=2) if (a[i]==1 || a[i+1]==1) {
        int bit = 0;
        if (a[i]==1 && a[i+1]==0) bit = 1;
        if (a[i]==1 && a[i+1]==1) bit = 2;
        bit = (bit - R[cur] + 3) % 3;
        x += bit * pwr[cur];
        cur++;
    }
    // cout << endl;
    return x;
}

• Subtask 1: 85 / 100