結果
問題 | No.1573 Divisor Function |
ユーザー | paruki |
提出日時 | 2021-07-01 14:41:06 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 7 ms / 2,000 ms |
コード長 | 2,937 bytes |
コンパイル時間 | 2,082 ms |
コンパイル使用メモリ | 203,976 KB |
実行使用メモリ | 6,944 KB |
最終ジャッジ日時 | 2024-06-28 03:27:42 |
合計ジャッジ時間 | 3,369 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
(要ログイン)
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 | 2 ms
6,816 KB |
testcase_01 | AC | 2 ms
6,940 KB |
testcase_02 | AC | 7 ms
6,940 KB |
testcase_03 | AC | 2 ms
6,940 KB |
testcase_04 | AC | 2 ms
6,944 KB |
testcase_05 | AC | 2 ms
6,940 KB |
testcase_06 | AC | 2 ms
6,940 KB |
testcase_07 | AC | 2 ms
6,940 KB |
testcase_08 | AC | 2 ms
6,944 KB |
testcase_09 | AC | 2 ms
6,944 KB |
testcase_10 | AC | 2 ms
6,940 KB |
testcase_11 | AC | 2 ms
6,944 KB |
testcase_12 | AC | 2 ms
6,940 KB |
testcase_13 | AC | 2 ms
6,944 KB |
testcase_14 | AC | 2 ms
6,940 KB |
testcase_15 | AC | 2 ms
6,940 KB |
testcase_16 | AC | 2 ms
6,940 KB |
testcase_17 | AC | 2 ms
6,940 KB |
testcase_18 | AC | 6 ms
6,940 KB |
testcase_19 | AC | 7 ms
6,944 KB |
testcase_20 | AC | 5 ms
6,940 KB |
testcase_21 | AC | 7 ms
6,944 KB |
testcase_22 | AC | 6 ms
6,944 KB |
testcase_23 | AC | 6 ms
6,940 KB |
testcase_24 | AC | 6 ms
6,940 KB |
testcase_25 | AC | 6 ms
6,944 KB |
testcase_26 | AC | 6 ms
6,944 KB |
testcase_27 | AC | 5 ms
6,940 KB |
testcase_28 | AC | 5 ms
6,940 KB |
testcase_29 | AC | 6 ms
6,940 KB |
testcase_30 | AC | 6 ms
6,944 KB |
testcase_31 | AC | 5 ms
6,940 KB |
testcase_32 | AC | 6 ms
6,940 KB |
testcase_33 | AC | 6 ms
6,944 KB |
testcase_34 | AC | 4 ms
6,944 KB |
testcase_35 | AC | 5 ms
6,940 KB |
testcase_36 | AC | 3 ms
6,940 KB |
testcase_37 | AC | 6 ms
6,940 KB |
testcase_38 | AC | 7 ms
6,944 KB |
testcase_39 | AC | 7 ms
6,940 KB |
testcase_40 | AC | 7 ms
6,940 KB |
testcase_41 | AC | 7 ms
6,940 KB |
testcase_42 | AC | 7 ms
6,940 KB |
testcase_43 | AC | 7 ms
6,944 KB |
testcase_44 | AC | 6 ms
6,940 KB |
testcase_45 | AC | 7 ms
6,944 KB |
ソースコード
#define _USE_MATH_DEFINES #include "bits/stdc++.h" using namespace std; #define FOR(i,j,k) for(int (i)=(j);(i)<(int)(k);++(i)) #define rep(i,j) FOR(i,0,j) #define each(x,y) for(auto &(x):(y)) #define mp make_pair #define MT make_tuple #define all(x) (x).begin(),(x).end() #define debug(x) cout<<#x<<": "<<(x)<<endl #define smax(x,y) (x)=max((x),(y)) #define smin(x,y) (x)=min((x),(y)) #define MEM(x,y) memset((x),(y),sizeof (x)) #define sz(x) (int)(x).size() #define RT return using ll = long long; using pii = pair<int, int>; using vi = vector<int>; using vll = vector<ll>; template<int MOD> class ModInt { public: ModInt() :value(0) {} ModInt(long long val) :value((int)(val < 0 ? MOD + val % MOD : val % MOD)) { } ModInt& operator+=(ModInt that) { value = value + that.value; if (value >= MOD)value -= MOD; return *this; } ModInt& operator-=(ModInt that) { value -= that.value; if (value < 0)value += MOD; return *this; } ModInt& operator*=(ModInt that) { value = (int)((long long)value * that.value % MOD); return *this; } ModInt& operator/=(ModInt that) { return *this *= that.inverse(); } ModInt operator+(ModInt that) const { return ModInt(*this) += that; } ModInt operator-(ModInt that) const { return ModInt(*this) -= that; } ModInt operator*(ModInt that) const { return ModInt(*this) *= that; } ModInt operator/(ModInt that) const { return ModInt(*this) /= that; } ModInt pow(long long k) const { ModInt n = *this, res = 1; if (k < 0) { k = -k; n = n.inverse(); } while (k) { if (k & 1)res *= n; n *= n; k >>= 1; } return res; } ModInt inverse() const { long long a = value, b = MOD, u = 1, v = 0; while (b) { long long t = a / b; a -= t * b; swap(a, b); u -= t * v; swap(u, v); } return ModInt(u); } int toi() const { return value; } private: int value; }; typedef ModInt<998244353> mint; // 素数 ostream& operator<<(ostream & os, const mint & x) { os << x.toi(); return os; } void solve() { int N, M; cin >> N >> M; mint ans; int low = 0; for (int i = 1; i * i <= N && i <= M; ++i) { mint x = N / i; ans += ((x + 1) * x / 2 + x) * i; low = i; } for (int i = 1; i * i < N; ++i) { int lb = max(low + 1, N / (i + 1) + 1); int ub = min(N / i, M); if (lb <= ub) { mint x = i; ans += ((x + 1) * x / 2 + x) * (ub + lb) * (ub - lb + 1ll) / 2; } } cout << ans << endl; } int main() { ios::sync_with_stdio(false); cin.tie(0); cout << fixed << setprecision(15); solve(); return 0; }