結果
| 問題 |
No.811 約数の個数の最大化
|
| コンテスト | |
| ユーザー |
mugen_1337
|
| 提出日時 | 2020-05-01 08:48:09 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 118 ms / 2,000 ms |
| コード長 | 1,232 bytes |
| コンパイル時間 | 3,746 ms |
| コンパイル使用メモリ | 199,260 KB |
| 最終ジャッジ日時 | 2025-01-10 03:55:39 |
|
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 12 |
コンパイルメッセージ
In file included from /usr/include/c++/13/istream:41,
from /usr/include/c++/13/sstream:40,
from /usr/include/c++/13/complex:45,
from /usr/include/c++/13/ccomplex:39,
from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:127,
from main.cpp:1:
In member function ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long long int) [with _CharT = char; _Traits = std::char_traits<char>]’,
inlined from ‘int main()’ at main.cpp:47:11:
/usr/include/c++/13/ostream:204:25: warning: ‘ans’ may be used uninitialized [-Wmaybe-uninitialized]
204 | { return _M_insert(__n); }
| ~~~~~~~~~^~~~~
main.cpp: In function ‘int main()’:
main.cpp:34:8: note: ‘ans’ was declared here
34 | ll ans,cnt=0;
| ^~~
ソースコード
#include<bits/stdc++.h>
using namespace std;
#define ALL(x) x.begin(),x.end()
#define rep(i,n) for(int i=0;i<(n);i++)
#define debug(v) cout<<#v<<":";for(auto x:v){cout<<x<<' ';}cout<<endl;
#define INF 1000000000
#define mod 1000000007
using ll=long long;
const ll LINF=1001002003004005006ll;
int dx[]={1,0,-1,0};
int dy[]={0,1,0,-1};
// ll gcd(ll a,ll b){return b?gcd(b,a%b):a;}
template<class T>bool chmax(T &a,const T &b){if(a<b){a=b;return true;}return false;}
template<class T>bool chmin(T &a,const T &b){if(b<a){a=b;return true;}return false;}
map<ll, int> PrimeFactor(ll n){
map<ll,int> ret;
for(ll i=2;i*i<=n;i++){
while(n%i==0){
ret[i]++;
n/=i;
}
}
if(n!=1) ret[n]=1;
return ret;
}
signed main(){
cin.tie(0);
ios::sync_with_stdio(0);
ll n,k;cin>>n>>k;
auto pfn=PrimeFactor(n);
ll ans,cnt=0;
for(ll i=1;i<n;i++){
auto mp=PrimeFactor(i);
ll t=0;
for(auto p:mp){
if(pfn.count(p.first)) t+=min(p.second,pfn[p.first]);
}
if(t>=k){
ll x=1;
for(auto p:mp) x*=(p.second+1ll);
if(chmax(cnt,x)) ans=i;
}
}
cout<<ans<<endl;
return 0;
}
mugen_1337