Mã chấm: 272271

Main.cc: In function ‘int main()’:
Main.cc:15:18: error: ‘a’ was not declared in this scope
      scanf("%d", a[i]);
                  ^
Main.cc:21:9: error: ‘a’ was not declared in this scope
      if(a[i] == 1)
         ^
Main.cc:34:1: error: expected ‘}’ at end of input
 }
 ^
Main.cc:9:10: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ~~~~~^~~~~~~~~~
Main.cc:10:10: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &x);
     ~~~~~^~~~~~~~~~
Main.cc:11:10: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &y);
     ~~~~~^~~~~~~~~~