求大佬帮忙看看，就七十分

#include <bits/stdc++.h> 
using namespace std; 
int main(){ 
	string a;
	cin>>a;
	if(a[0]=='-'){
		cout<<"-";
		for(long long i=a.size()-1;i>0;i--){
			if(a[i]=='0') continue;
			else cout<<a[i];
		}
	}else{
		for(long long i=a.size()-1;i>=0;i--){
			if(a[i]=='0') continue;
			else cout<<a[i];
		}
	}
	return 0; 
}