foo.cc: In function 'void read(_T&)':
foo.cc:12:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   12 |     if(_t=='-') _flag=true,_t=getchar(); _x=_t-'0';
      |     ^~
foo.cc:12:42: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   12 |     if(_t=='-') _flag=true,_t=getchar(); _x=_t-'0';
      |                                          ^~
foo.cc: In function 'int main()':
foo.cc:44:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   44 |         mid=le+ri>>1;
      |             ~~^~~

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