#include<iostream>
#include<stack>
#include<string>
using namespace std;
stack<int> mystack;
string a;
int n, js = 0;
int main(){
cin >> n;
for(int i = 1;i <= n;i ++){
a = i;
while(i > 0){
mystack.push(i % 10);
i /= 10;
}
for(int j = mystack.size() - 1;j > 0;j --){
if(a[j] == mystack.top()){
js ++;
mystack.pop();
}
}
if(js == mystack.size()){
cout << i << endl;
}
}
return 0;
}
我用Mingw编译的,
运行时出现了这样的错误:
/home/keith/builds/mingw/gcc-9.2.0-mingw32-cross-native/mingw32/libstdc++-v3/include/bits/basic_string.h:1067: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::reference std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::operator[](std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::reference = char&; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = unsigned int]: Assertion '__pos <= size()' failed.
该怎样改正,谢谢!!