/in/foo.cc: In function 'int main()':
/in/foo.cc:20:5: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
     else
     ^~~~
/in/foo.cc:22:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else'
   return 0;
   ^~~~~~

VJ4Error('ProblemDataNotFoundError', '题目 1004 的数据未找到。', 'MJ_C', 1004)