#include <iostream>

#define C  3

template<int N, int M=N%C> struct Foo {
  Foo() { std::cout << N << " % " << C << " != 0" << std::endl; }
};
template<int N> struct Foo<N, 0> {
  Foo() { std::cout << N << " % " << C << " = 0" << std::endl; }
};

int main() {
  Foo<0> p0;
  Foo<1> p1;
  Foo<2> p2;
  Foo<3> p3;
}