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    |  | 讨论 Discussion |  |  
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        |  fclose(stdin);   fclose(stdout);fclose(s |  
        | fclose(stdin); fclose(stdout);fclose(stdin);
 fclose(stdout);fclose(stdin);
 fclose(stdout);fclose(stdin);
 fclose(stdout);fclose(stdin);
 fclose(stdout);fclose(stdin);
 fclose(stdout);fclose(stdin);
 fclose(stdout);
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              | Flag |  |  
              | 题号 | P1693 |  
            |  | 模拟 |  
              | 通过 | 43人 |  
              | 提交 | 108次 |  
              | 通过率 | 40% |  
              | 难度 | 0 |  |  |  
        |  |  |  |  |