結果
| 問題 | No.2829 GCD Divination |
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2024-08-02 22:53:17 |
| 言語 | C++17 (gcc 15.2.0 + boost 1.90.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 675 bytes |
| 記録 | |
| コンパイル時間 | 2,730 ms |
| コンパイル使用メモリ | 281,816 KB |
| 実行使用メモリ | 9,296 KB |
| 最終ジャッジ日時 | 2026-07-05 09:19:16 |
| 合計ジャッジ時間 | 3,744 ms |
|
ジャッジサーバーID (参考情報) |
judge1_0 / judge2_0 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 5 WA * 30 |
コンパイルメッセージ
main.cpp: In function 'int main()':
main.cpp:26:36: warning: ignoring return value of 'std::basic_ostream<_CharT, _Traits>* std::basic_ios<_CharT, _Traits>::tie() const [with _CharT = char; _Traits = std::char_traits<char>]', declared with attribute 'nodiscard' [-Wunused-result]
26 | ios::sync_with_stdio(0);cin.tie();
| ~~~~~~~^~
In file included from /home/linuxbrew/.linuxbrew/Cellar/gcc@15/15.3.0/include/c++/15/ios:48,
from /home/linuxbrew/.linuxbrew/Cellar/gcc@15/15.3.0/include/c++/15/istream:42,
from /home/linuxbrew/.linuxbrew/Cellar/gcc@15/15.3.0/include/c++/15/sstream:42,
from /home/linuxbrew/.linuxbrew/Cellar/gcc@15/15.3.0/include/c++/15/complex:50,
from /home/linuxbrew/.linuxbrew/Cellar/gcc@15/15.3.0/include/c++/15/x86_64-pc-linux-gnu/bits/stdc++.h:141,
from main.cpp:1:
/home/linuxbrew/.linuxbrew/Cellar/gcc@15/15.3.0/include/c++/15/bits/basic_ios.h:310:7: note: declared here
310 | tie() const
| ^~~
ソースコード
#include <bits/stdc++.h>
#include <atcoder/all>
using ll = long long;
#define MOD 1000000007
#define Mod 998244353
const int MAX = 1000000005;
const long long INF = 1000000000000000005LL;
using namespace std;
using namespace atcoder;
map<int, double> dp;
double rec(int n) {
if (dp.count(n)) return dp[n];
if (n == 1) return 0;
double s = 0;
for (int m = 2; m*m <= n; m++) {
if (n % m == 0) {
s += rec(m);
if (n/m != m) s += rec(n/m);
}
}
return dp[n] = (n + s)/(n - 1);
}
int main() {
ios::sync_with_stdio(0);cin.tie();
int N;
cin >> N;
cout << fixed << setprecision(30) << rec(N) << endl;
}