Grader

grade.c

#include <stdio.h>
int score;
int main(void){
	printf("Your score: ");
	scanf("%d", &score);
	if(score>100){
		printf("You cheat!");
	}else{
		if(score>79){
			printf("Grade 4");
		}else{
			if(score>69){
				printf("Grade 3");
			}else{
				if(score>59){
					printf("Grade 2");
				}else{
					if(score>49){
						printf("Grade 1");
					}else{
						printf("Grade 0");
					}
				}
			}
		}
	}
	return 0;
}

grade.py

score=input("Your score: ");
if score>100:
	print "You cheat!";
else:
	if score>79:
		print "Grade 4";
	else:
		if score>69:
			print "Grade 3";
		else:
			if score>59:
				print "Grade 2";
			else:
				if score>49:
					print "Grade 1";
				else:
					print "Grade 0";