#include <stdio.h>
void main()
{
int score;
if(score>=80)
else if ((score>=70)&&(score<=79))
else if ((score>=60)&&(score<=69))
else if ((score>=50)&&(score<=59))
else if ((score>=40)&&(score<=49))
else
printf("\nGoodbye From Kanokchai"); return 0;
}
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