测试点3 4没过

#include<iostream>
using namespace std; 
int main(){  
    int s1,s2,s,x;
	double a=0,l=7;
    cin>>s>>x;
    s1=s-x;
    s2=s+x;
    while(a<s1){
		a=a+l;
    	l=l*0.98;
	}
	if(a+l>s2){
		cout<<"n";
	}else {
		cout<<"y";
	}
    return 0;
}