Submission #991262

#	Time	Username	Problem	Language	Result	Execution time	Memory
991262		onbert	Broken Device (JOI17_broken_device)	C++17	85 / 100	30 ms	3096 KiB

Anna

#include "Annalib.h"
#include <bits/stdc++.h>
using namespace std;
#define int long long
const int m = 37;

void Anna(int32_t n, long long x, int32_t k, int32_t p[]){
    int pwr[m+1];
    pwr[0] = 1;
    for (int i=1;i<=m;i++) pwr[i] = pwr[i-1] * 3;
    int a[n];
    for (int i=0;i<n;i++) a[i] = 1;
    for (int i=0;i<k;i++) a[p[i]] = 0;
    for (int i=0;i<n;i++) if (a[i ^ 1]==0) a[i] = 0;
    int cur = 0;
    for (int i=0;i<n;i+=2) if (a[i]) {
        int val = x%3;
        if (val==0) a[i] = 0, a[i+1] = 1;
        if (val==1) a[i] = 1, a[i+1] = 0;
        x /= 3;
    }
    // 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;

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) {
        if (a[i]==1 && a[i+1]==0) x += pwr[cur];
        if (a[i]==1 && a[i+1]==1) x += 2*pwr[cur];
        cur++;
    }
    // cout << x << endl;
    return x;
}

Compilation message (stderr)

Anna.cpp: In function 'void Anna(int32_t, long long int, int32_t, int32_t*)':
Anna.cpp:15:9: warning: unused variable 'cur' [-Wunused-variable]
   15 |     int cur = 0;
      |         ^~~

• Subtask 1: 85 / 100