結果
問題 | No.886 Direct |
ユーザー | Min_25 |
提出日時 | 2019-09-14 23:31:51 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 4,214 bytes |
コンパイル時間 | 1,109 ms |
コンパイル使用メモリ | 101,176 KB |
実行使用メモリ | 6,944 KB |
最終ジャッジ日時 | 2024-07-06 22:04:31 |
合計ジャッジ時間 | 2,413 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge1 |
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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 | 2 ms
5,248 KB |
testcase_01 | AC | 1 ms
5,376 KB |
testcase_02 | WA | - |
testcase_03 | AC | 2 ms
5,376 KB |
testcase_04 | AC | 2 ms
5,376 KB |
testcase_05 | AC | 1 ms
5,376 KB |
testcase_06 | AC | 2 ms
5,376 KB |
testcase_07 | AC | 1 ms
5,376 KB |
testcase_08 | WA | - |
testcase_09 | AC | 2 ms
5,376 KB |
testcase_10 | AC | 2 ms
5,376 KB |
testcase_11 | AC | 2 ms
5,376 KB |
testcase_12 | WA | - |
testcase_13 | AC | 2 ms
5,376 KB |
testcase_14 | AC | 2 ms
5,376 KB |
testcase_15 | AC | 1 ms
5,376 KB |
testcase_16 | AC | 2 ms
5,376 KB |
testcase_17 | AC | 2 ms
5,376 KB |
testcase_18 | WA | - |
testcase_19 | AC | 2 ms
5,376 KB |
testcase_20 | AC | 2 ms
5,376 KB |
testcase_21 | WA | - |
testcase_22 | AC | 3 ms
5,376 KB |
testcase_23 | AC | 11 ms
5,376 KB |
testcase_24 | WA | - |
testcase_25 | WA | - |
testcase_26 | AC | 11 ms
5,376 KB |
testcase_27 | WA | - |
testcase_28 | AC | 21 ms
5,376 KB |
testcase_29 | AC | 1 ms
5,376 KB |
testcase_30 | AC | 1 ms
5,376 KB |
testcase_31 | AC | 26 ms
5,376 KB |
testcase_32 | AC | 25 ms
5,376 KB |
testcase_33 | WA | - |
testcase_34 | AC | 24 ms
5,376 KB |
testcase_35 | AC | 26 ms
5,376 KB |
ソースコード
#include <cstdio> #include <cassert> #include <cmath> #include <cstring> #include <iostream> #include <algorithm> #include <vector> #include <map> #include <set> #include <functional> #include <stack> #include <queue> #include <tuple> #define getchar getchar_unlocked #define putchar putchar_unlocked #define _rep(_1, _2, _3, _4, name, ...) name #define rep2(i, n) rep3(i, 0, n) #define rep3(i, a, b) rep4(i, a, b, 1) #define rep4(i, a, b, c) for (int i = int(a); i < int(b); i += int(c)) #define rep(...) _rep(__VA_ARGS__, rep4, rep3, rep2, _)(__VA_ARGS__) using namespace std; using i64 = long long; using u8 = unsigned char; using u32 = unsigned; using u64 = unsigned long long; using u128 = __uint128_t; using f80 = long double; int get_int() { int n, c, sign = 0; while ((c = getchar()) < '-'); if (c == '-') sign = 1, n = 0; else n = c - '0'; while ((c = getchar()) >= '0') n = n * 10 + c - '0'; return sign ? -n : n; } int isqrt(i64 N) { return sqrtl(N); } template <typename T> T fast_sum(i64 N, i64 M) { if (N < M) swap(N, M); if (M == 0) return T(N, M); const int vN = isqrt(N), wN = max<int>(1, N / (vN + 1)); const int vM = max<int>(1, M / wN); vector<T> lN(wN + 1); vector<T> memo(vN + vM); vector<int> offset(vN + 2, -2); int o = 0; auto memoize = [&] (int n, int m, const T& v) { if (m == 0) return; if (offset[n] == -2) offset[n] = o - m; memo[o++] = v; }; auto cache = [&] (int n, int m) -> T { return (m == 0) ? T(n, m) : memo[offset[n] + m]; }; vector<i64> qn(vN + 2), qm(vM + 2); auto calc = [&] (const i64 n, const i64 m, const i64 k) -> T { auto ret = T(n, m); if (n <= 1 || m == 0) return ret; const int vn = isqrt(n), wn = n / (vn + 1), vm = max<int>(1, m / wn); for (int i = 1; i <= vn + 1; ++i) qn[i] = n / i; for (int i = 1; i <= vm + 1; ++i) qm[i] = m / i; for (int n2 = 1, m2 = m / n; n2 <= vn; ++n2) { if (qm[m2 + 1] >= qn[n2 + 1]) { ret -= cache(n2, m2).sum(qm[m2 + 1], qn[n2]); ++m2; ret -= cache(n2, m2).sum(qn[n2 + 1], qm[m2]); } else { ret -= cache(n2, m2).sum(qn[n2 + 1], qn[n2]); } } for (int i = 2; i <= wn; ++i) { ret -= (i * k <= wN ? lN[i * k] : cache(n / i, m / i)).sum(i - 1, i); } return ret; }; vector<i64> qN(vN + 2), qM(vM + 2); qM[0] = N; for (int i = 1; i <= vN + 1; ++i) qN[i] = N / i; for (int i = 1; i <= vM + 1; ++i) qM[i] = M / i; for (int n = 1, m = M / N; n <= vN; ++n) { if (qM[m + 1] >= qN[n + 1]) memoize(n, m, calc(n, m, wN + 1)), ++m; memoize(n, m, calc(n, m, wN + 1)); } for (int k = wN; k >= 1; --k) lN[k] = calc(N / k, M / k, k); return lN[1]; } struct Sum { static constexpr u128 S1(u64 n) { return u128(n) * (n + 1) >> 1; } static constexpr u128 S2(u64 n) { return u128(n) * (n + 1) * (2 * n + 1) / 6; } Sum() : Sum(0, 0) {} Sum(i64 N, i64 M) : s00(u128(N) * M), s01(u128(N) * S1(M)), s10(S1(N) * M), s11(S1(N) * S1(M)) {} Sum sum(i64 a, i64 b) const { // (a, b] auto ret = Sum(*this); ret.s00 *= (b - a); auto c1 = S1(b) - S1(a); ret.s01 *= c1; ret.s10 *= c1; ret.s11 *= S2(b) - S2(a); return ret; } Sum& operator -= (const Sum& rhs) { s00 -= rhs.s00; s01 -= rhs.s01; s10 -= rhs.s10; s11 -= rhs.s11; return *this; } Sum operator - (const Sum& rhs) const { return Sum(*this) -= rhs; } u128 s00, s01, s10, s11; }; u128 naive(i64 N, i64 M) { u128 ans = 0; for (int dy = 1; dy < N; ++dy) { for (int dx = 1; dx < M; ++dx) { int g = __gcd(dx, dy) == 1; ans += u128(M - dx) * (N - dy) * g; } } ans *= 2; ans += u128(N - 1) * M + u128(N) * (M - 1); return ans; } u128 fast(i64 N, i64 M) { auto ans = fast_sum<Sum>(N - 1, M - 1); u128 ret = ans.s00 * N * M - ans.s01 * N - ans.s10 * M + ans.s11; return ret * 2 + u128(N - 1) * M + u128(N) * (M - 1); } void solve() { const int mod = 1e9 + 7; int N, M; while (~scanf("%d %d", &N, &M)) { auto ans = fast(N, M); printf("%llu\n", i64(ans % mod)); } } int main() { clock_t beg = clock(); solve(); clock_t end = clock(); fprintf(stderr, "%.3f sec\n", double(end - beg) / CLOCKS_PER_SEC); return 0; }