OJ Board

A workaround for the scope bug:
[cpp]
#define for if(0); else for
[/cpp]
Put this somewhere near the top of your source file, and 'for' will behave as it should.

As far as I can remember someone who competed in the regional contest where this problem was originally given said that the judge input might have been wrong. So if the judge data used here is the same as the one that was used in the contest then maybe the admins should take a look at it. Of course ...

As far as I know cin converts to false if EOF is reached. So you can use
[cpp]int k;
while( cin >> k ) {
process( k );
}[/cpp]
to read numbers until EOF.

You should calculate Euler's phi function for the given input values. Since phi is multiplicative it's easy to calculate it: phi(n)=phi(p1^k1) * ... * phi(pl^kl) where n=p1^k1 * ... * pl^kl and p1, ..., pl are primes. phi(p^k) = p^k - p^(k-1) if p is prime. For example: 12 = 2^2 * 3, phi(12) = phi(2...

I have both GCC (2.95.4) and Freepascal (1.0.6), so I tested what Ivan wrote. I tried the following programs: [pascal] program test; var i, x, y: longint; begin for i:=1 to 10000000 do begin x:=i; y:=x mod 10; x:=x mod 10; end; end. [/pascal] [c] int main() { int i, x, y; for(i=1;i<=10000000;i++) { ...

I think the problem is that there is no \0 at the end of 'permout'.
Before printing it, put a zero character at the end of 'permout' (e.g. permout[len]=0)

I think in the first case the output should be 2.