foo.cc: In member function 'FastIO& FastIO::operator>>(char*)':
foo.cc:25:98: warning: no return statement in function returning non-void [-Wreturn-type]
  FastIO& operator >> (char* s){int Len=0;char ch=nc();while(ch!='\n'){*(s+Len)=ch;Len++;ch=nc();}}
                                                                                                  ^
foo.cc: In member function 'FastIO& FastIO::operator<<(T)':
foo.cc:28:3: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
   while(stk[0]) pc('0'+stk[stk[0]--]);return *this;
   ^~~~~
foo.cc:28:39: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'while'
   while(stk[0]) pc('0'+stk[stk[0]--]);return *this;
                                       ^~~~~~
foo.cc: In function 'int main()':
foo.cc:37:3: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   if(!(d%pri[i])) check(pri[i]);if(!ans){puts("0");continue;} if(d^1) check(d);fout<<ans<<'\n';
   ^~
foo.cc:37:33: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   if(!(d%pri[i])) check(pri[i]);if(!ans){puts("0");continue;} if(d^1) check(d);fout<<ans<<'\n';
                                 ^~
foo.cc:36:74: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   fin>>a>>b>>c>>d,ans=1;if((a%b)||(d%c)||(d%b)){fout<<0<<'\n';continue;} for(register int i=1;i<=tot&&pri[i]<=sqrt(d)&&ans;i++) 
                                                                          ^~~
foo.cc:37:33: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   if(!(d%pri[i])) check(pri[i]);if(!ans){puts("0");continue;} if(d^1) check(d);fout<<ans<<'\n';
                                 ^~

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