# include <stdio.h>
# include <math.h>
int main()
{
double n;
double s;
int i = 0;
int flag = 0;
if( n == 0||n == 1){
flag = 1;
}
if(n > (double)1){
for(i = 0; i <(int) n/2; i++){
if( s == n){
flag = 1;
break;
}
}
}
if(flag == 0){
}else if(flag == 1){
}
return 0;
}
IyBpbmNsdWRlIDxzdGRpby5oPgojIGluY2x1ZGUgPG1hdGguaD4KaW50IG1haW4oKQp7Cglkb3VibGUgbjsKCWRvdWJsZSBzOwoJaW50IGkgPSAwOwoJaW50IGZsYWcgPSAwOwoJc2NhbmYoIiVsZiIsJm4pOwoJaWYoIG4gPT0gMHx8biA9PSAxKXsKCQlmbGFnID0gMTsKCX0KCWlmKG4gPiAoZG91YmxlKTEpewoJZm9yKGkgPSAwOyBpIDwoaW50KSBuLzI7IGkrKyl7CgkJcyAgPSBwb3coMiwoZG91YmxlKWkpOwoJCWlmKCBzID09IG4pewoJCQlmbGFnID0gMTsKCQkJYnJlYWs7CgkJfQoJfQp9CglpZihmbGFnID09IDApewoJCXByaW50ZigiTklFXG4iKTsKCX1lbHNlIGlmKGZsYWcgPT0gMSl7CgkJcHJpbnRmKCJUQUtcbiIpOwoJfQoJCglyZXR1cm4gMDsKfQ==