combinatorics/bell.cpp

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Last update: 2021-03-25 09:21:12+09:00

Depends on

combinatorics/enumeration.cpp

Verified with

test/aoj/DPL_5_G.test.cpp

Code

#ifndef call_from_test
#include <bits/stdc++.h>
using namespace std;

#define call_from_test
#include "enumeration.cpp"
#undef call_from_test

#endif
//BEGIN CUT HERE
// put n distinct balls into at most k identical boxes
template<typename M>
M bell(int n,int k){
  if(n==0) return M(1);

  using E = Enumeration<M>;
  k=min(k,n);
  E::init(k);

  vector<M> dp(k+1);
  dp[0]=M(1);
  for(int i=1;i<=k;i++)
    dp[i]=dp[i-1]+((i&1)?-E::Finv(i):E::Finv(i));

  M res(0);
  for(int i=1;i<=k;i++)
    res+=M(i).pow(n)*E::Finv(i)*dp[k-i];
  return res;
}
//END CUT HERE
#ifndef call_from_test
signed main(){
  return 0;
}
#endif

Traceback (most recent call last):
  File "/opt/hostedtoolcache/Python/3.11.3/x64/lib/python3.11/site-packages/onlinejudge_verify/documentation/build.py", line 71, in _render_source_code_stat
    bundled_code = language.bundle(stat.path, basedir=basedir, options={'include_paths': [basedir]}).decode()
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/hostedtoolcache/Python/3.11.3/x64/lib/python3.11/site-packages/onlinejudge_verify/languages/cplusplus.py", line 187, in bundle
    bundler.update(path)
  File "/opt/hostedtoolcache/Python/3.11.3/x64/lib/python3.11/site-packages/onlinejudge_verify/languages/cplusplus_bundle.py", line 400, in update
    raise BundleErrorAt(path, i + 1, "unable to process #include in #if / #ifdef / #ifndef other than include guards")
onlinejudge_verify.languages.cplusplus_bundle.BundleErrorAt: combinatorics/bell.cpp: line 6: unable to process #include in #if / #ifdef / #ifndef other than include guards