/in/foo.cc: In function 'int cover(int, int, int)':
/in/foo.cc:34:17: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
                 if(b[i]) id=i;wr++;
                 ^~
/in/foo.cc:34:31: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
                 if(b[i]) id=i;wr++;
                               ^~
/in/foo.cc: In function 'bool check(int)':
/in/foo.cc:57:13: warning: unused variable 'ha' [-Wunused-variable]
         int ha=0;
             ^~