/in/foo.cc: In function 'void rot(int)':
/in/foo.cc:29:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
     if(nroot(y))c[z][c[z][1]==y]=x;c[x][!k]=y;c[y][k]=w;
     ^~
/in/foo.cc:29:36: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
     if(nroot(y))c[z][c[z][1]==y]=x;c[x][!k]=y;c[y][k]=w;
                                    ^