A. Right-Left Cipher Round #528 (Div. 2)【字符串】

 1 #include <bits/stdc++.h>
 2 
 3 using namespace std;
 4 
 5 
 6 int main()
 7 {
 8     //freopen("input.txt", "r", stdin);
 9     string s;
10     while(cin>>s)
11     {
12         string ans = "";
13         int len = s.length();
14         int left = 0, right = len-1;
15         if(len%2 == 1)
16         {
17             ans = ans + s[0];
18             left++;
19         }
20         while(left < right)
21         {
22             ans = s[right--] + ans;
23             ans = s[left++] + ans;
24         }
25         cout << ans << endl;
26     }
27     return 0;
28 }