Submission #1363031

#	Time	Username	Problem	Language	Result	Execution time	Memory
1363031		solution6312	Friend (IOI14_friend)	C++17	Compilation error	0 ms	0 KiB

friend

//#include "parrots.h"
#include <iostream>
#include <cassert>
using namespace std;

void send(int x);
void output(int y);

void encode(int N, int A[])
{
    int cnt=0;
    for (int i=0; i<N; i++)
    {
        for (int j=0; j<8; j+=2)
        {
            bool b1=((A[i]>>j)&1), b2=((A[i]>>(j+1))&1);
            int id=i*4+j/2, c=b1*2+b2;
            cnt+=c;
        }
    }
    cerr<<cnt<<endl;
    if (cnt<=N*6)
    {
        for (int i=0; i<N; i++)
        {
            for (int j=0; j<8; j+=2)
            {
                bool b1=((A[i]>>j)&1), b2=((A[i]>>(j+1))&1);
                int id=i*4+j/2, c=b1+b2*2;
                while (c--) send(id);
            }
        }
    }
    else
    {
        send(0); send(0); send(0); send(0);
        for (int i=0; i<N; i++)
        {
            for (int j=0; j<8; j+=2)
            {
                bool b1=((A[i]>>j)&1), b2=((A[i]>>(j+1))&1);
                int id=i*4+j/2, c=b1+b2*2; c=3-c;
                while (c--) send(id);
            }
        }
    }
}
void decode(int N, int L, int B[])
{
    int cnt[256]={0}, ans[N]={0};
    for (int i=0; i<L; i++) cnt[B[i]]++;
    if (cnt[0]<4)
    {
        for (int i=0; i<256; i++)
        {
            int q=i/4, r=i%4; r*=2;
            if (cnt[i]==1) ans[q]^=(1<<r);
            else if (cnt[i]==2) ans[q]^=(1<<(r+1));
            else if (cnt[i]==3)
            {
                ans[q]^=(1<<r);
                ans[q]^=(1<<(r+1));
            }
        }
    }
    else
    {
        cnt[0]-=4;
        for (int i=0; i<256; i++)
        {
            int q=i/4, r=i%4; r*=2;
            if (cnt[i]==2) ans[q]^=(1<<r);
            else if (cnt[i]==1) ans[q]^=(1<<(r+1));
            else if (cnt[i]==0)
            {
                ans[q]^=(1<<r);
                ans[q]^=(1<<(r+1));
            }
        }
    }
    for (int i=0; i<N; i++)
    {
        //cerr<<ans[i]<<' ';
        output(ans[i]);
    } //cerr<<endl;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccvBK1YI.o: in function `main':
grader.cpp:(.text.startup+0xe5): undefined reference to `findSample(int, int*, int*, int*)'
/usr/bin/ld: /tmp/cc2KTonj.o: in function `encode(int, int*)':
friend.cpp:(.text+0xf6): undefined reference to `send(int)'
/usr/bin/ld: friend.cpp:(.text+0x157): undefined reference to `send(int)'
/usr/bin/ld: friend.cpp:(.text+0x15e): undefined reference to `send(int)'
/usr/bin/ld: friend.cpp:(.text+0x165): undefined reference to `send(int)'
/usr/bin/ld: friend.cpp:(.text+0x16c): undefined reference to `send(int)'
/usr/bin/ld: /tmp/cc2KTonj.o:friend.cpp:(.text+0x1bf): more undefined references to `send(int)' follow
/usr/bin/ld: /tmp/cc2KTonj.o: in function `decode(int, int, int*)':
friend.cpp:(.text+0x397): undefined reference to `output(int)'
collect2: error: ld returned 1 exit status