/in/foo.cc: In member function 'void DancingLinks::remove(int)':
/in/foo.cc:62:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
         if (!exist[ptr]) return; exist[ptr]=false;
         ^~
/in/foo.cc:62:34: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
         if (!exist[ptr]) return; exist[ptr]=false;
                                  ^~~~~
/in/foo.cc: In member function 'void DancingLinks::restore(int)':
/in/foo.cc:69:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
         if (exist[ptr]) return; exist[ptr]=true;
         ^~
/in/foo.cc:69:33: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
         if (exist[ptr]) return; exist[ptr]=true;
                                 ^~~~~
/in/foo.cc: In function 'void print()':
/in/foo.cc:223:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for (int i=0;i<9;i++) for (int j=0;j<9;j++) putchar(map[i][j]+48); putchar('\n');
     ^~~
/in/foo.cc:223:72: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
     for (int i=0;i<9;i++) for (int j=0;j<9;j++) putchar(map[i][j]+48); putchar('\n');
                                                                        ^~~~~~~