Submit Info #4555

Problem Lang User Status Time Memory
Sum of Floor of Linear cpp ei1333 AC 94 ms 1.86 MiB

ケース詳細
Name Status Time Memory
example_00 AC 2 ms 0.68 MiB
random_00 AC 25 ms 0.97 MiB
random_01 AC 94 ms 1.86 MiB
random_02 AC 73 ms 1.55 MiB
random_03 AC 50 ms 1.28 MiB
random_04 AC 25 ms 0.92 MiB
small_00 AC 14 ms 0.71 MiB
small_01 AC 43 ms 1.05 MiB
small_02 AC 32 ms 0.92 MiB
small_03 AC 22 ms 0.80 MiB
small_04 AC 10 ms 0.71 MiB

#include <bits/stdc++.h> using namespace std; using int64 = long long; const int mod = 998244353; const int64 infll = (1LL << 62) - 1; const int inf = (1 << 30) - 1; struct IoSetup { IoSetup() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(10); cerr << fixed << setprecision(10); } } iosetup; template< typename T1, typename T2 > ostream &operator<<(ostream &os, const pair< T1, T2 > &p) { os << p.first << " " << p.second; return os; } template< typename T1, typename T2 > istream &operator>>(istream &is, pair< T1, T2 > &p) { is >> p.first >> p.second; return is; } template< typename T > ostream &operator<<(ostream &os, const vector< T > &v) { for(int i = 0; i < (int) v.size(); i++) { os << v[i] << (i + 1 != v.size() ? " " : ""); } return os; } template< typename T > istream &operator>>(istream &is, vector< T > &v) { for(T &in : v) is >> in; return is; } template< typename T1, typename T2 > inline bool chmax(T1 &a, T2 b) { return a < b && (a = b, true); } template< typename T1, typename T2 > inline bool chmin(T1 &a, T2 b) { return a > b && (a = b, true); } template< typename T = int64 > vector< T > make_v(size_t a) { return vector< T >(a); } template< typename T, typename... Ts > auto make_v(size_t a, Ts... ts) { return vector< decltype(make_v< T >(ts...)) >(a, make_v< T >(ts...)); } template< typename T, typename V > typename enable_if< is_class< T >::value == 0 >::type fill_v(T &t, const V &v) { t = v; } template< typename T, typename V > typename enable_if< is_class< T >::value != 0 >::type fill_v(T &t, const V &v) { for(auto &e : t) fill_v(e, v); } template< typename F > struct FixPoint : F { explicit FixPoint(F &&f) : F(forward< F >(f)) {} template< typename... Args > decltype(auto) operator()(Args &&... args) const { return F::operator()(*this, forward< Args >(args)...); } }; template< typename F > inline decltype(auto) MFP(F &&f) { return FixPoint< F >{forward< F >(f)}; } template< typename T > T sum_of_floor(const T &n, const T &m, T a, T b) { T ret = 0; if(a >= m) ret += (n - 1) * n * (a / m) / 2, a %= m; if(b >= m) ret += n * (b / m), b %= m; T y = (a * n + b) / m; if(y == 0) return ret; T x = y * m - b; ret += (n - (x + a - 1) / a) * y; ret += sum_of_floor(y, a, m, (a - x % a) % a); return ret; } int main() { int T; cin >> T; while(T--) { int64 N, M, A, B; cin >> N >> M >> A >> B; cout << sum_of_floor(N, M, A, B) << "\n"; } }