Accepted
/in/foo.cc: In function 'bool permutation(int)':
/in/foo.cc:38:1: warning: control reaches end of non-void function [-Wreturn-type]
}
^
/in/foo.cc: In function 'int main()':
/in/foo.cc:42:5: warning: iteration 24 invokes undefined behavior [-Waggressive-loop-optimizations]
k[i]=i;
~~~~^~
/in/foo.cc:41:16: note: within this loop
for(R int i=1;i<=25;i++)
~^~~~
