結果
| 問題 |
No.1383 Numbers of Product
|
| コンテスト | |
| ユーザー |
emthrm
|
| 提出日時 | 2021-02-08 03:06:07 |
| 言語 | C++17(gcc12) (gcc 12.3.0 + boost 1.87.0) |
| 結果 |
TLE
(最新)
AC
(最初)
|
| 実行時間 | - |
| コード長 | 2,290 bytes |
| コンパイル時間 | 7,724 ms |
| コンパイル使用メモリ | 262,248 KB |
| 最終ジャッジ日時 | 2025-01-18 16:15:26 |
|
ジャッジサーバーID (参考情報) |
judge3 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 50 TLE * 1 |
ソースコード
#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;
#define FOR(i,m,n) for(int i=(m);i<(n);++i)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) (v).begin(),(v).end()
using ll = long long;
constexpr int INF = 0x3f3f3f3f;
constexpr long long LINF = 0x3f3f3f3f3f3f3f3fLL;
constexpr double EPS = 1e-8;
constexpr int MOD = 1000000007;
// constexpr int MOD = 998244353;
constexpr int dy[] = {1, 0, -1, 0}, dx[] = {0, -1, 0, 1};
constexpr int dy8[] = {1, 1, 0, -1, -1, -1, 0, 1}, dx8[] = {0, -1, -1, -1, 0, 1, 1, 1};
template <typename T, typename U> inline bool chmax(T &a, U b) { return a < b ? (a = b, true) : false; }
template <typename T, typename U> inline bool chmin(T &a, U b) { return a > b ? (a = b, true) : false; }
struct IOSetup {
IOSetup() {
std::cin.tie(nullptr);
std::ios_base::sync_with_stdio(false);
std::cout << fixed << setprecision(20);
}
} iosetup;
int main() {
ll n, k, m; cin >> n >> k >> m;
double log10_n_EPS = log10(n) + EPS;
unordered_map<ll, int> mp;
ll a = 1;
for (; log10(a) + log10(a + k) + log10(a + k * 2) < log10_n_EPS; ++a) {
ll mul = a * (a + k);
assert(mul <= n);
++mp[mul];
int b = 2;
while (log10(mul) + log10(a + b * k) < log10_n_EPS) {
mul *= a + b * k;
if (mul > n) break;
++mp[mul];
++b;
}
}
ll lb = a - 1, ub = static_cast<ll>(ceil(sqrt(n))) + 1;
while (ub - lb > 1) {
ll mid = (lb + ub) >> 1;
(log10(mid) + log10(mid + k) < log10_n_EPS && mid * (mid + k) <= n ? lb : ub) = mid;
}
ll l = a * (a + k), r = lb * (lb + k);
auto check = [&](ll x) {
if (lb < a || x < l || r < x) return false;
if (x == l || x == r) return true;
ll low = a + 1, high = min(lb, static_cast<ll>(ceil(sqrt(x))) + 1);
while (high - low > 1) {
ll mid = (low + high) >> 1;
(mid * (mid + k) <= x ? low : high) = mid;
}
return low * (low + k) == x;
};
ll ans = 0;
if (m == 1) {
for (auto [x, f] : mp) {
if (check(x)) {
--ans;
} else if (f == 1) {
++ans;
}
}
ans += max(lb - a + 1, 0LL);
} else {
for (auto [x, f] : mp) {
if (f == m) {
ans += !check(x);
} else if (f + 1 == m) {
ans += check(x);
}
}
}
cout << ans << '\n';
return 0;
}
emthrm