/in/foo.cc: In function 'void Read(_T&)':
/in/foo.cc:14:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
  if(_t=='-')_flag=1,_t=getchar();_x=_t-'0';
  ^~
/in/foo.cc:14:34: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
  if(_t=='-')_flag=1,_t=getchar();_x=_t-'0';
                                  ^~
/in/foo.cc: In function 'int main()':
/in/foo.cc:87:38: warning: operation on 'L' may be undefined [-Wsequence-point]
  while((t=getchar())!=' '&&t!='\n')a[++L]=c[L]=t;
                                      ^~~