WHY??? 0 score??????

#include<iostream>

using namespace std;

int change(int n){
	int s=n,t=0;
	while(s!=0){
		t=s%10+t*10;
		s/=10;
	}
	return t;
}

int main(){
	int n,m,step,ans=0,c=0;
	bool flag = true;
	cin>>n>>m;
	for(step=1;step<=n;step++){
		c=change(m);
		if(m==c){
			flag=false;
			break;
		}
		ans=m+c;
		
	//	cout<<"step"<<step<<": "<<m<<"+"<<c<<"="<<ans<<endl;
		m=ans;
	}
	if(flag) cout<<"Impossible!";
	else cout<<"STEP="<<step-1;
}