#include <stdio.h>
int main() {
int x;
if ( x>=90 )
else if ( x<90 && x>=80 )
else if ( x<80 && x>=60 )
else
return 0;
}
I2luY2x1ZGUgPHN0ZGlvLmg+CgppbnQgbWFpbigpIHsKCWludCB4OwoJc2NhbmYoIiVkIiwmeCk7CglpZiAoICAgeD49OTAgICAgKQoJCXByaW50ZigiIFMgXG4iKTsKCWVsc2UgaWYgKCB4PDkwICYmICB4Pj04MCAgICApCgkJcHJpbnRmKCIgQSBcbiIpOwoJZWxzZSBpZiAoIHg8ODAgJiYgeD49NjAgICAgICkKCQlwcmludGYoIiBCIFxuIik7CgllbHNlCgkJcHJpbnRmKCIgRCBcbiIpOwoJcmV0dXJuIDA7Cn0K