CF803C Maximal GCD (思维

??   写在纸上了

 1 #include<bits/stdc++.h>
 2 #define mem(a) memset(a,sizeof(a))
 3 #define mem1(a) memset(a,-1,sizeof(a))
 4 #define ll long long
 5 #define mp make_pair
 6 #define inf 0x3f3f3f3f
 7 const int N=1e6+5;
 8 const int M=1e3+10;
 9 const ll lim=1e14+5;
10 using namespace std;
11 int m,f[N];
12 ll n,k,a[N];
13 int main()
14 {
15      cin>>n>>k;
16      if(k>=1e6||(k*(k+1)/2)>n) cout<<-1<<endl;
17      else
18      {
19            ll Now=k*(k+1)/2,ans=0; int id=0;
20            for(ll i=1;i*i<=n;i++)
21             if(n%i==0) a[++id]=i;
22  
23            for(ll i=1;i<=id;i++)
24            {
25                if(Now<=a[i]) {ans=n/a[i];break;}
26                else if(n/a[i]>=Now) ans=a[i];
27            }
28            for(ll i=1;i<k;i++)
29             cout<<i*ans<<" ";
30            cout<<ans*(n/ans-(Now-k))<<endl;
31  
32      }
33      return 0;
34 }

CF 803C