Submission #973157

#	Time	Username	Problem	Language	Result	Execution time	Memory
973157		sleepntsheep	Question (Grader is different from the original contest) (CEOI14_question_grader)	C11	0 / 100	1 ms	4780 KiB

encoder

#include <stdio.h>

int set[925], iota;

void init()
{    
    for (int iota = 0, i = 1; i < (1<<12); ++i)
    if(__builtin_popcount(i) == 6)
    {
        ++iota;
        for(int j=0;j<12;++j)set[iota] |= ((i>>j)&1)<<j;
    }
}

int encode(int n,int x,int y)
{
    if (!iota) init();
    for(int i=0;i<12;++i)
        if((set[x]&(1<<i))&&!(set[y]&(1<<i)))
            return i;
}

decoder

#include <stdio.h>

int set[925], iota;

void init()
{    
    for (int iota = 0, i = 1; i < (1<<12); ++i)
    if(__builtin_popcount(i) == 6)
    {
        ++iota;
        for(int j=0;j<12;++j)set[iota] |= ((i>>j)&1)<<j;
    }
}


int decode (int n, int q, int h)
{
    if (!iota) init();
    return(set[q]&(1<<(h-1)));
}

Compilation message (stderr)

encoder.c: In function 'encode':
encoder.c:21:1: warning: control reaches end of non-void function [-Wreturn-type]
   21 | }
      | ^

• Subtask 1: 0 / 100