1 #include <cstdio>
 2 #include <string>
 3 using namespace std;
 4 
 5 char s[201000];
 6 
 7 int main()
 8 {
 9     while(gets(s)){
10         int sum = 0;
11         for(int i = 0; s[i] != ‘\0‘; ++i){
12             string tmp("");
13             tmp = tmp+s[i]+s[i+1];   //构造成字符串，判断中文引号，写成tmp += s[i]+s[i+1]会得到WA。
14             if(tmp == "“" || tmp == "”")
15                 ++sum;
16             if(s[i] == ‘"‘){
17                 if(sum%2 == 0)
18                     printf("“");
19                 else
20                     printf("”");
21                 ++sum;
22             }
23             else if(s[i] == ‘,‘) printf("，");
24             else if(s[i] == ‘.‘) printf("。");
25             else if(s[i] == ‘!‘) printf("！");
26             else if(s[i] == ‘?‘) printf("？");
27             else if(s[i] == ‘<‘ && s[i+1] == ‘<‘){
28                 ++i;
29                 printf("《");
30             }
31             else if(s[i] == ‘>‘ && s[i+1] == ‘>‘){
32                 ++i;
33                 printf("》");
34             }
35             else
36                 printf("%c", s[i]);
37         }
38         printf("\n");   //补上gets后的‘\n‘
39     }
40     return 0;
41 }