foo.cc: In function 'int main()':
foo.cc:21:116: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[20]' [-Wformat=]
   scanf("%s %lld %lld %c %c %lld", &stu[i].name,&stu[i].score,&stu[i].cla,&stu[i].leader,&stu[i].west,&stu[i].paper);
                                    ~~~~~~~~~~~~                                                                    ^
foo.cc:45:42: warning: format '%ld' expects argument of type 'long int', but argument 3 has type 'long long int' [-Wformat=]
  printf("%s\n%ld\n%ld", flag->name, max,z);
                                          ^
foo.cc:45:42: warning: format '%ld' expects argument of type 'long int', but argument 4 has type 'long long int' [-Wformat=]
foo.cc:18:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld", &N);
  ~~~~~^~~~~~~~~~~~
foo.cc:21:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%s %lld %lld %c %c %lld", &stu[i].name,&stu[i].score,&stu[i].cla,&stu[i].leader,&stu[i].west,&stu[i].paper);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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