#include <cstdio> #include <vector> #include <map> #include <set> std::vector<int> factors; std::map<int,std::set<int> > memo; const std::set<int>& dfs(int n){ if(memo.count(n)) return memo[n]; auto& ans=memo[n]; if(n==1){ ans.insert(0); }else{ for(int f:factors){ if(n%f==0){ auto& set=dfs(n/f); for(int x:set){ ans.insert(x+(f-1)); } } } } return ans; } int main(){ int N; scanf("%d",&N); for(int x=1;x*x<=N;x++){ if(N%x==0){ factors.push_back(x); if(x*x<N){ factors.push_back(N/x); } } } auto& ans=dfs(N); printf("%d\n",(int)ans.size()); for(int x:ans){ printf("%d ",x); } }

toy.cpp: In function 'int main()':
toy.cpp:30:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&N);
   ~~~~~^~~~~~~~~