Submission #1099036

#	Time	Username	Problem	Language	Result	Execution time	Memory
1099036		LIA	Flight to the Ford (BOI22_communication)	C++17	Compilation error	0 ms	0 KiB

communication

#include <bits/stdc++.h>
using namespace std;

#include <vector>
#include <cstdio>
#include <cstdlib>
#include <cassert>
#include "communication.h"

void encode(int N, int X) {
    if (X == 1) {
        send(0);
        send(1);
    } else if (X == 2) {
        send(1);
        send(0);
    } else if (X == 3) {
        send(1);
        send(1);
    }
}

pair<int, int> decode(int N) {
    int first_bit = receive();
    int second_bit = receive();

    if (first_bit == 0 && second_bit == 1) {
        return {1, 1};
    } else if (first_bit == 1 && second_bit == 0) {
        return {2, 2};
    } else if (first_bit == 1 && second_bit == 1) {
        return {3, 3};
    }

    return {1, 2};
}

int main() {
    int N, X;
    if (scanf("%d %d", &N, &X) != 2 || X < 1 || X > N)
        return 0;

    encode(N, X);
    auto r = decode(N);

    if (r.first < 1 || r.first > N || r.second < 1 || r.second > N)
        return 0;

    if (r.first == X || r.second == X)
        return 0;
    else
        return 1; 
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccThm9gc.o: in function `main':
interface.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccUPmtVc.o:communication.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status