/in/foo.cc: In function 'mt qk(mt, mt, int)':
/in/foo.cc:27:4: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
    if(y&1)r=r*x;x=x*x;
    ^~
/in/foo.cc:27:17: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
    if(y&1)r=r*x;x=x*x;
                 ^