#include <stdio.h>

#include <stdbool.h>

void fastscan( int &number ) ;

int main()

{

    int number ;

    fastscan( number ) ;

    printf("%d\n",number) ;

    return 0 ;

}

void fastscan( int &number )

{

    bool negative = false ;

    number = 0 ;

    register int c ;

    c = getchar() ;

    if( c == '-' )  {

        negative = true ;

        c = getchar() ;

    }

    for( ; c >= 48 && c <= 57 ; c = getchar() )  {

        // number = number*10 + c - 48 ;

        number = ( number << 1 ) + ( number << 3 ) + c - 48 ;

    }

    if( negative )  {

        number *= -1 ;

    }

}