結果
問題 | No.554 recurrence formula |
ユーザー |
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提出日時 | 2020-09-02 15:42:27 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 1,453 bytes |
コンパイル時間 | 2,692 ms |
コンパイル使用メモリ | 208,496 KB |
最終ジャッジ日時 | 2025-01-14 03:34:41 |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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ファイルパターン | 結果 |
---|---|
other | AC * 20 WA * 1 |
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:2: 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 ‘void out(T) [with T = long long int]’ at main.cpp:26:46, inlined from ‘int main()’ at main.cpp:49:8: /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:39:8: note: ‘ans’ was declared here 39 | ll ans; | ^~~
ソースコード
#pragma GCC optimize("Ofast") #include <bits/stdc++.h> #define rep(i,n) for(int i=0;i<n;i++) #define cinf(n,x) for(int i=0;i<(n);i++)cin>>x[i]; #define ft first #define sc second #define pb push_back #define lb lower_bound #define ub upper_bound #define all(v) (v).begin(),(v).end() #define LB(a,x) lb(all(a),x)-a.begin() #define UB(a,x) ub(all(a),x)-a.begin() #define mod 1000000007 //#define mod 998244353 #define FS fixed<<setprecision(15) using namespace std; typedef long long ll; const double pi=3.141592653589793; template<class T> using V=vector<T>; using Graph = vector<vector<int>>; using P=pair<ll,ll>; typedef unsigned long long ull; typedef long double ldouble; template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; } template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; } template<class T> inline void out(T a){ cout << a << '\n'; } void YN(bool ok){if(ok) cout << "Yes" << endl; else cout << "No" << endl;} //void YN(bool ok){if(ok) cout << "YES" << endl; else cout << "NO" << endl;} const ll INF=1e18; const int mx=200005; int main(){ cin.tie(0);ios::sync_with_stdio(false); ll n; cin>>n; ll odd=1,even=0; ll ans; for(ll i=2;i<=n;i++){ if(i%2==0){ ans=i*odd%mod; even=(even+ans)%mod; }else{ ans=i*even%mod; odd=(odd+ans)%mod; } } out(ans); }