用了栈但是#1RE，求调

#include <bits/stdc++.h>
using namespace std;
stack<char> p;
int main()
{
	char c;
	while(cin >> c)
	{
		if (c == '-') cout << "-";
		else p.push(c);
	}

	while(p.top() == '0')
	p.pop();
	while(!p.empty())
    {
		cout << p.top();
		p.pop();
	}
    if (p.top() == '0') return 0;
	return 0;
}