Submission #11167

#	Time	Username	Problem	Language	Result	Execution time	Memory
11167		gs13068	Question (Grader is different from the original contest) (CEOI14_question_grader)	C++98	100 / 100	1588 ms	25680 KiB

encoder

static int flag;
static int a[1000];
 
void init()
{
    if(!flag)
    {
        int i,j,k,n=0;
        for(i=0;i<4096;i++)
        {
            k=0;
            for(j=0;j<12;j++)k+=(i>>j)&1;
            if(k==6)a[n++]=i;
        }
        flag=1;
    }
}
 
int encode(int N,int x,int y)
{
    int i;
    init();
    for(i=0;i<12;i++)if(((a[x]>>i)&1)&&!((a[y]>>i)&1))return i+1;
    while(1);
}

decoder

static int flag;
static int a[1000];
 
void init()
{
    if(!flag)
    {
        int i,j,k,n=0;
        for(i=0;i<4096;i++)
        {
            k=0;
            for(j=0;j<12;j++)k+=(i>>j)&1;
            if(k==6)a[n++]=i;
        }
        flag=1;
    }
}
 
int decode(int N,int x,int y)
{
    init();
    return (a[x]>>(y-1))&1;
}

• Subtask 1: 100 / 100