题解 | #单词倒排#

#include <string.h>
#include<algorithm>
#include<iostream>
#include<string>
using namespace std;
int main()
{
    string a;
    while (getline(cin, a))
    {
        string b;
        while (a.length())
        {
            int c = 0;
            for (int i = 0; i < a.length(); i++)
            {
                if (('a' <= a[i] && a[i] <= 'z') || ('A' <= a[i] && a[i] <= 'Z'))
                {
                    c++;
                }
                if (c == a.length())
                {
                    b += a;
                    a = "";
                }

            }
            
            for (int i = a.length() - 1; i >= 0; i--)
            {
                if (!(('a' <= a[i] && a[i] <= 'z') || ('A' <= a[i] && a[i] <= 'Z')))
                {
                    b += a.substr(i + 1, a.length() );
                    b += ' ';
                    if (i == 0)
                    {
                        a = "";
                    }
                    else
                    {
                        
                                a = a.substr(0, i);
                                break;
                    
                    }
                    break;
                }

            }
        }
        cout << b << '\n';
    }
    return(0);
}