foo.cc: In function 'int main()':
foo.cc:15:16: error: 'x' was not declared in this scope
   15 |    scanf("%d",&x);
      |                ^
foo.cc:22:14: warning: format '%lld' expects argument of type 'long long int', but argument 2 has type 'int' [-Wformat=]
   22 |   printf("%lld\n",ans+all);
      |           ~~~^    ~~~~~~~
      |              |       |
      |              |       int
      |              long long int
      |           %d
foo.cc:6:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
    6 |  freopen("flip.in","r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
foo.cc:7:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
    7 |  freopen("flip.out","w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
foo.cc:8:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    8 |  scanf("%d",&t);
      |  ~~~~~^~~~~~~~~
foo.cc:12:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   12 |   scanf("%d",&n);
      |   ~~~~~^~~~~~~~~

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Found 10 testcases.
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