이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define pop pop_back
#define fbo find_by_order
#define ook order_of_key
typedef long long ll;
typedef pair<ll,ll> pi;
typedef vector<ll> vi;
typedef long double ld;
typedef tree<ll, null_type, less<ll>, rb_tree_tag, tree_order_statistics_node_update> pbds;
typedef set<ll>::iterator sit;
typedef map<ll,ll>::iterator mit;
typedef pair<int,pair<int,int> > tri;
unordered_set<ll> ans;
ll n;
vector<ll> fac;
void factorize(ll n, ll now, ll smallfac){
if(now == n){
int tem = -fac.size();
for(int i = 0; i < fac.size(); i++) tem+=fac[i];
ans.insert(tem);
}
for(int i = smallfac; i*now <= n; i++){
if((n/now) % i == 0){
fac.pb(i);
factorize(n, now*i, i);
fac.pop();
}
}
}
int main()
{
ios_base::sync_with_stdio(0); cin.tie(0);
cin >> n;
factorize(n, 1, 2);
cout<<ans.size()<<endl;
for(unordered_set<ll>::iterator it = ans.begin(); it!=ans.end(); it++){
cout<<*it<<' ';
}
return 0;
}
컴파일 시 표준 에러 (stderr) 메시지
toy.cpp: In function 'void factorize(ll, ll, ll)':
toy.cpp:32:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i = 0; i < fac.size(); i++) tem+=fac[i];
~~^~~~~~~~~~~~
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