/* package whatever; // don't place package name! */
import java.util.* ;
import java.lang.* ;
import java.io.* ;
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
{
int uczniowie[ ] = new int [ 500 ] ;
int cukierki[ ] = new int [ 500 ] ;
Scanner skan
= new Scanner
( System .
in ) ;
int t = skan.nextInt ( ) ;
for ( int i= 0 ; i< t; i++ ) {
uczniowie[ i] = skan.nextInt ( ) ;
cukierki[ i] = skan.nextInt ( ) ;
}
for ( int i= 0 ; i< t; i++ ) {
if ( cukierki[ i] == 0 )
else {
uczniowie[ i] = uczniowie[ i] - 1 ;
if ( uczniowie[ i] < cukierki[ i] )
else {
if ( uczniowie[ i] % cukierki[ i] == 0 )
else
}
}
}
}
}
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