結果
問題 | No.1653 Squarefree |
ユーザー | 👑 Nachia |
提出日時 | 2024-01-28 17:54:14 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 1,849 ms / 2,000 ms |
コード長 | 3,252 bytes |
コンパイル時間 | 679 ms |
コンパイル使用メモリ | 69,248 KB |
実行使用メモリ | 82,152 KB |
最終ジャッジ日時 | 2024-09-28 09:55:30 |
合計ジャッジ時間 | 55,574 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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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 | 1,787 ms
81,380 KB |
testcase_01 | AC | 2 ms
5,376 KB |
testcase_02 | AC | 2 ms
5,376 KB |
testcase_03 | AC | 2 ms
5,376 KB |
testcase_04 | AC | 2 ms
5,376 KB |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | AC | 1 ms
5,376 KB |
testcase_07 | AC | 2 ms
5,376 KB |
testcase_08 | AC | 2 ms
5,376 KB |
testcase_09 | AC | 2 ms
5,376 KB |
testcase_10 | AC | 1 ms
5,376 KB |
testcase_11 | AC | 2 ms
5,376 KB |
testcase_12 | AC | 2 ms
5,376 KB |
testcase_13 | AC | 1,840 ms
82,148 KB |
testcase_14 | AC | 1,849 ms
81,892 KB |
testcase_15 | AC | 1,810 ms
82,020 KB |
testcase_16 | AC | 1,823 ms
81,760 KB |
testcase_17 | AC | 1,807 ms
81,892 KB |
testcase_18 | AC | 1,794 ms
81,888 KB |
testcase_19 | AC | 1,830 ms
81,892 KB |
testcase_20 | AC | 1,790 ms
82,152 KB |
testcase_21 | AC | 1,805 ms
82,016 KB |
testcase_22 | AC | 1,832 ms
82,020 KB |
testcase_23 | AC | 1,804 ms
82,020 KB |
testcase_24 | AC | 1,799 ms
81,256 KB |
testcase_25 | AC | 1,833 ms
81,764 KB |
testcase_26 | AC | 1,793 ms
82,148 KB |
testcase_27 | AC | 1,829 ms
81,764 KB |
testcase_28 | AC | 1,652 ms
76,644 KB |
testcase_29 | AC | 1,775 ms
82,020 KB |
testcase_30 | AC | 1,831 ms
82,020 KB |
testcase_31 | AC | 1,767 ms
82,148 KB |
testcase_32 | AC | 1,757 ms
82,020 KB |
testcase_33 | AC | 1,786 ms
82,020 KB |
testcase_34 | AC | 1,775 ms
82,012 KB |
testcase_35 | AC | 1,790 ms
82,024 KB |
testcase_36 | AC | 1,788 ms
81,892 KB |
testcase_37 | AC | 1,732 ms
81,768 KB |
testcase_38 | AC | 1,774 ms
81,892 KB |
testcase_39 | AC | 1,776 ms
81,676 KB |
testcase_40 | AC | 1,772 ms
81,764 KB |
ソースコード
#include <vector> #include <cmath> #include <cassert> namespace nachia{ namespace internal{ // mod 2^64 constexpr unsigned long long PowerOfULongLong(unsigned long long a, unsigned long long i){ unsigned long long res = 1; while(i){ if(i&1){ res *= a; } i /= 2; a *= a; } return res; } } unsigned long long FloorOfKthRoot(unsigned long long real, unsigned long long k){ using u64 = unsigned long long; assert(k != 0); if(real <= 1) return real; if(k >= 64) return 1; if(k == 1) return real; struct Precalc{ // a^i <= x static constexpr bool lesseq(u64 a, int i, u64 x) { if (a == 0) return true; for(int j=0; j<i; j++) x /= a; return x >= 1; } unsigned long long BORDER[64]; constexpr Precalc() : BORDER() { for (int idx = 2; idx <= 63; idx++) { u64 l = 0, r = 1ull << 33; while (l + 1 < r) { u64 m = (l + r) / 2; if (lesseq(m, idx, ~0ull)) l = m; else r = m; } BORDER[idx] = r; } }; }; constexpr Precalc precalc; u64 l = 0, r = precalc.BORDER[k]; if(real < r) r = real; while (l + 1 < r) { u64 m = (l + r) / 2; if(internal::PowerOfULongLong(m, k) <= real) l = m; else r = m; } return l; } unsigned long long CeilOfKthRoot(unsigned long long real, unsigned long long k){ if(real <= 1) return real; if(k >= 64) return 2; if(k == 1) return real; unsigned long long x = FloorOfKthRoot(real, k); if(internal::PowerOfULongLong(x, k) != real) x++; return x; } } // namespace nachia namespace nachia{ long long CountSquarefree(long long n){ using i64 = long long; i64 s = 0; auto getMobius = [&](i64 n){ std::vector<bool> sieve(n+1, true); std::vector<signed char> mu(n+1, 1); for(i64 i=2; i<=n; i++) if(sieve[i]){ mu[i] = -1; for(i64 j=i*i; j<=n; j+=i) sieve[j] = false; for(i64 j=i*2; j<=n; j+=i) mu[j] = -mu[j]; for(i64 j=i*i; j<=n; j+=i*i) mu[j] = 0; } return mu; }; if(n <= 4000){ auto mu = getMobius(n+1); for(i64 i=1; i*i<=n; i++) s += n/(i*i) * mu[i]; return s; } i64 I = nachia::FloorOfKthRoot(n, 5); i64 D = nachia::FloorOfKthRoot(n/(I+1), 2); auto mu = getMobius(D+1); std::vector<int> Mf(D+1); for(i64 i=1; i<=D; i++) Mf[i] = Mf[i-1] + mu[i]; std::vector<i64> Md(I+1); for(i64 i=I; i>=1; i--){ i64 m = 1; i64 x = nachia::FloorOfKthRoot(n/i, 2); i64 Dx = nachia::FloorOfKthRoot(x, 2); i64 Rx = x / (Dx+1); i64 r = 2; for( ; i*r*r<=I; r++) m -= Md[i*r*r]; for( ; r<=Rx; r++) m -= Mf[x/r]; for(i64 d=1; d<=Dx; d++) m -= mu[d] * (x/d - Rx); Md[i] = m; s += m; } for(i64 i=1; i<=D; i++) s += mu[i] * (n/(i*i) - I); return s; } } // namespace nachia #include <cstdio> int main(){ long long L, R; scanf("%lld%lld", &L, &R); long long ans = nachia::CountSquarefree(R) - nachia::CountSquarefree(L-1); printf("%lld\n", ans); return 0; }