Submission #978284

#	Time	Username	Problem	Language	Result	Execution time	Memory
978284		sleepntsheep	Broken Device (JOI17_broken_device)	C11	0 / 100	256 ms	3064 KiB

Anna

#include "Annalib.h"
#include<string.h>
#include<stdlib.h>

typedef unsigned long long u64;
static u64 vecspace[150];
static void init() { for(int i=0;i<150;++i) vecspace[i]=rand()*1llu*rand()*1llu*rand(); }

u64 basis[64];
int basis_toggle[64][110];

int map[150], rvmap[110];

void basis_add(u64 x,int id)
{
    int toggle[110]={0};
    toggle[id] = 1;

    for(int j=60;j>=0;--j)
    {
        if(0==((x>>j)&1))
            continue;
        if (basis[j])
        {
            for (int k=0;k<110;++k)
                toggle[k] ^= basis_toggle[j][k];
            x ^= basis[j];
        }
        else
        {
            basis[j] = x;
            memcpy(basis_toggle[j], toggle, sizeof toggle);
        }
    }
}

void Anna( int N, long long X, int K, int P[] ){
    srand(86868686u);
    init();

    int skillissue[150]={0};
    for(int i=0;i<K;++i)skillissue[P[i]]=1;

    int c1=0;
    for(int i=0;i<150;++i)
    {
        if(skillissue[i]==0)map[i]=c1,rvmap[c1]=i,++c1;
    }

    for(int i=0;i<64;++i)basis[i]=0;
    for(int i=0;i<150;++i)
    {
        if(map[i]>=110)continue;
        if(skillissue[i])continue;
        basis_add(vecspace[i], map[i]);
    }

    int encode[150]={0};
    for(int j=60;j>=0;--j)
    {
        if(0==((X>>j)&1))
            continue;
        X ^= basis[j];
        for(int k=0;k<110;++k)
            encode[rvmap[k]] ^= basis_toggle[j][k];
    }

    for(int i=0;i<150;++i) Set(i,encode[i]);
}

Bruno

#include "Brunolib.h"
#include<stdlib.h>

static unsigned long long vecspace[150];
static void init() { for(int i=0;i<150;++i) vecspace[i]=rand()*1llu*rand()*1llu*rand(); }

long long Bruno( int N, int A[] ){
    srand(86868686u);
    init();
    unsigned long long X=0;
    for(int i=0;i<150;++i) if(A[i]) X^=vecspace[i];
    return X;
}

• Subtask 1: 0 / 100