include[HTML_REMOVED]
include[HTML_REMOVED]
using namespace std;
int main(){
int left=0,right=0,n,x,ans;
cin>>n;
cin>>x;
for(int i=1;i[HTML_REMOVED]>ans;
//在感冒蚂蚁左边并且向右走
if(abs(ans)[HTML_REMOVED]0)
right;
if(abs(ans)>abs(x)&&ans<0)
left ;
}
//感冒蚂蚁永远没回头 特殊情况
if( (x<0&& right==0)||x>0 && left==0) cout<<”1”<<endl;
else cout<<left+right+1<<endl;
return 0;
}