結果
問題 | No.1573 Divisor Function |
ユーザー | PCTprobability |
提出日時 | 2021-04-22 18:50:47 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 20 ms / 2,000 ms |
コード長 | 3,455 bytes |
コンパイル時間 | 4,641 ms |
コンパイル使用メモリ | 263,864 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-06-25 11:15:35 |
合計ジャッジ時間 | 6,304 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 3 ms
5,248 KB |
testcase_01 | AC | 3 ms
5,376 KB |
testcase_02 | AC | 20 ms
5,376 KB |
testcase_03 | AC | 3 ms
5,376 KB |
testcase_04 | AC | 3 ms
5,376 KB |
testcase_05 | AC | 3 ms
5,376 KB |
testcase_06 | AC | 2 ms
5,376 KB |
testcase_07 | AC | 3 ms
5,376 KB |
testcase_08 | AC | 3 ms
5,376 KB |
testcase_09 | AC | 3 ms
5,376 KB |
testcase_10 | AC | 3 ms
5,376 KB |
testcase_11 | AC | 3 ms
5,376 KB |
testcase_12 | AC | 3 ms
5,376 KB |
testcase_13 | AC | 3 ms
5,376 KB |
testcase_14 | AC | 3 ms
5,376 KB |
testcase_15 | AC | 3 ms
5,376 KB |
testcase_16 | AC | 3 ms
5,376 KB |
testcase_17 | AC | 3 ms
5,376 KB |
testcase_18 | AC | 18 ms
5,376 KB |
testcase_19 | AC | 19 ms
5,376 KB |
testcase_20 | AC | 12 ms
5,376 KB |
testcase_21 | AC | 18 ms
5,376 KB |
testcase_22 | AC | 16 ms
5,376 KB |
testcase_23 | AC | 14 ms
5,376 KB |
testcase_24 | AC | 16 ms
5,376 KB |
testcase_25 | AC | 19 ms
5,376 KB |
testcase_26 | AC | 17 ms
5,376 KB |
testcase_27 | AC | 14 ms
5,376 KB |
testcase_28 | AC | 13 ms
5,376 KB |
testcase_29 | AC | 18 ms
5,376 KB |
testcase_30 | AC | 17 ms
5,376 KB |
testcase_31 | AC | 14 ms
5,376 KB |
testcase_32 | AC | 18 ms
5,376 KB |
testcase_33 | AC | 19 ms
5,376 KB |
testcase_34 | AC | 8 ms
5,376 KB |
testcase_35 | AC | 13 ms
5,376 KB |
testcase_36 | AC | 8 ms
5,376 KB |
testcase_37 | AC | 18 ms
5,376 KB |
testcase_38 | AC | 19 ms
5,376 KB |
testcase_39 | AC | 19 ms
5,376 KB |
testcase_40 | AC | 19 ms
5,376 KB |
testcase_41 | AC | 19 ms
5,376 KB |
testcase_42 | AC | 20 ms
5,376 KB |
testcase_43 | AC | 20 ms
5,376 KB |
testcase_44 | AC | 19 ms
5,376 KB |
testcase_45 | AC | 19 ms
5,376 KB |
ソースコード
#include <bits/stdc++.h> #include <unistd.h> using namespace std; #if __has_include(<atcoder/all>) #include <atcoder/all> using namespace atcoder; #endif using ll = long long; using ld = long double; using ull = long long; #define REP3(i, m, n) for (int i = (m); (i) < int(n); ++ (i)) #define ALL(x) begin(x), end(x) #define all(s) (s).begin(),(s).end() #define rep2(i, m, n) for (int i = (m); i < (n); ++i) #define rep(i, n) rep2(i, 0, n) #define drep2(i, m, n) for (int i = (m)-1; i >= (n); --i) #define drep(i, n) drep2(i, n, 0) #define rever(vec) reverse(vec.begin(), vec.end()) #define sor(vec) sort(vec.begin(), vec.end()) #define fi first #define se second #define P pair<ll,ll> #define REP(i, n) for (int i = 0; i < (n); ++i) #define in scanner.read_int() const ll mod = 998244353; //const ll mod = 1000000007; const ll inf = 2000000000000000000ll; static const long double pi = 3.141592653589793; template<class T>void vcin(vector<ll> &n){for(int i=0;i<int(n.size());i++) cin>>n[i];} template<class T>void vcout(vector<T> &n){for(int i=0;i<int(n.size());i++){cout<<n[i]<<" ";}cout<<endl;} void YesNo(bool a){if(a){cout<<"Yes"<<endl;}else{cout<<"No"<<endl;}} void YESNO(bool a){if(a){cout<<"YES"<<endl;}else{cout<<"NO"<<endl;}} template<class T,class U> void chmax(T& t,const U& u){if(t<u) t=u;} template<class T,class U> void chmin(T& t,const U& u){if(t>u) t=u;} template<class T> void ifmin(T t,T u){if(t>u){cout<<-1<<endl;}else{cout<<t<<endl;}} template<class T> void ifmax(T t,T u){if(t>u){cout<<-1<<endl;}else{cout<<t<<endl;}} template<typename T,typename ...Args>auto make_vector(T x,int arg,Args ...args){if constexpr(sizeof...(args)==0)return vector<T>(arg,x);else return vector(arg,make_vector<T>(x,args...));} ll modPow(ll a, ll n, ll mod) { ll ret = 1; ll p = a % mod; while (n) { if (n & 1) ret = ret * p % mod; p = p * p % mod; n >>= 1; } return ret; } void gbjsmzmfuuvdf(){ ios::sync_with_stdio(false); std::cin.tie(nullptr); cout<< fixed << setprecision(20); } class Scanner { vector<char> buffer; ssize_t n_written; ssize_t n_read; public: Scanner(): buffer(1024*1024) { do_read(); } int64_t read_int() { int64_t ret = 0, sgn = 1; int ch = current_char(); while (isspace(ch)) { ch = next_char(); } if (ch == '-') { sgn = -1; ch = next_char(); } for (; isdigit(ch); ch = next_char()) ret = (ret * 10) + (ch - '0'); return sgn * ret; } private: void do_read() { ssize_t r = read(0, &buffer[0], buffer.size()); if (r < 0) { throw runtime_error(strerror(errno)); } n_written = r; n_read = 0; } inline int next_char() { ++n_read; if (n_read == n_written) { do_read(); } return current_char(); } inline int current_char() { return (n_read == n_written) ? EOF : buffer[n_read]; } }; int main() { Scanner scanner; gbjsmzmfuuvdf(); ll n,m; n=in; m=in; assert(1<=n&&n<=1000000000&&1<=m&&m<=1000000000); ll ans=0; ll k=0; for(ll i=1;i*i<=n&&i<=m;i++){ ans+=i*(n/i)%mod*(n/i+3)%mod*modPow(2,mod-2,mod); ans%=mod; chmax(k,i); } ll q=k+1; for(ll i=n/q;i>=1;i--){ ll s=n/i-n/(i+1); ll p=q+s-1; p=min(p,m); s=max(0ll,p-q+1); ans+=(p+q)*s%mod*modPow(2,mod-2,mod)%mod*i%mod*(i+3)%mod*modPow(2,mod-2,mod); ans%=mod; if(s==0){ break; } q=p+1; } cout<<ans<<"\n"; }