#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>

#include <string>
#include <iostream>

int error_check( int result, std::string text )
{
    if ( result == -1 )
        throw text ;

    return result ;
}

template < typename Input, typename Output >
void check( std::string name, Input input, Output output )
{
    int infd[2] ;

    error_check( pipe( infd ), "Error: pipe failed." ) ;


    int outfd[2] ;
    error_check( pipe( outfd ), "Error: pipe failed." ) ;

    pid_t cpid = error_check( fork(), "Error: fork failed." ) ;

    // child
    if ( cpid == 0 )
    {
        close( infd[1] ) ;
        close( outfd[0] ) ;

        dup2( infd[0], STDIN_FILENO ) ;
        dup2( outfd[1], STDOUT_FILENO ) ;

        close( infd[0] ) ;
        close( outfd[1] ) ;

        error_check(
            execl( "./main", "main", static_cast<char *>(nullptr) )
            , "Error: exec failed." ) ;

    }
    // parent
    else
    {

        close( infd[0] ) ;
        close( outfd[1] ) ;

        int in = dup( STDIN_FILENO ) ;
        int out = dup( STDOUT_FILENO ) ;

        dup2( outfd[0], STDIN_FILENO ) ;
        dup2( infd[1], STDOUT_FILENO ) ;

        input() ;
        bool result = output() ;

        dup2( in, STDIN_FILENO ) ;
        dup2( out, STDOUT_FILENO ) ;

        std::cout << name << " : " << (result ? "Accepted" : "Wrong Answer") << std::endl ;
    }

}

int main()
try {

    check( "YES test",
        [](){ std::cout << "1" << std::endl ;},
        [](){
            std::string output ;
            std::cin >> output ;
            return output == "YES" ;
        } ) ;

    check( "NO test",
        [](){ std::cout << "0" << std::endl ; },
        [](){
            std::string output ;
            std::cin >> output ;
            return output == "NO" ;
        } ) ;

} catch ( std::string text )
{
    std::cerr << text << std::endl ;
    return 1 ;
}