#include<stdio.h>

int main(){
	
	double a,b,k;
	scanf("%lf %lf %lf",&a,&b,&k);
	
	double sum=500;//直接放引燃 
	b*=1.2;//额外伤害加20%
	sum=sum+a+b*0.9;//用1技能,100% 90%
	b*=1.2;//额外伤害加20%
 	sum=sum+a;//2技能第一刀
	b*=1.2;//额外伤害加20%
	sum=sum+a+2*b;//2技能第二刀
	b*=1.2;//额外伤害加20%
	int g=4;
	while(g--){
		sum=sum+a+5*b;//3技能每一刀
		b*=1.2;//额外伤害加20%
	}
	if(sum>=k){
		printf("You have slain an enemy");
	}
	else{
		printf("You have been slain");
	}
	return 0;
}