結果
| 問題 |
No.3136 F,B in FizzBuzzString16
|
| コンテスト | |
| ユーザー |
Kude
|
| 提出日時 | 2025-05-02 22:48:17 |
| 言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 5 ms / 2,000 ms |
| コード長 | 3,074 bytes |
| コンパイル時間 | 3,616 ms |
| コンパイル使用メモリ | 300,368 KB |
| 実行使用メモリ | 7,844 KB |
| 最終ジャッジ日時 | 2025-05-02 22:48:22 |
| 合計ジャッジ時間 | 4,857 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 7 |
| other | AC * 32 |
ソースコード
#include<bits/stdc++.h>
namespace {
#pragma GCC diagnostic ignored "-Wunused-function"
#include<atcoder/all>
#pragma GCC diagnostic warning "-Wunused-function"
using namespace std;
using namespace atcoder;
#define rep(i,n) for(int i = 0; i < (int)(n); i++)
#define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; i--)
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; } else return false; }
template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return true; } else return false; }
using ll = long long;
using P = pair<int,int>;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;
template <class T>
struct cntsum {
T a, b; // a+bx mod x^2
friend cntsum operator+(const cntsum& lhs, const cntsum& rhs) { return {lhs.a + rhs.a, lhs.b + rhs.b}; }
friend cntsum operator-(const cntsum& lhs, const cntsum& rhs) { return {lhs.a - rhs.a, lhs.b - rhs.b}; }
friend cntsum operator*(const cntsum& lhs, const cntsum& rhs) { return {lhs.a * rhs.a, lhs.a * rhs.b + lhs.b * rhs.a}; }
friend cntsum operator*(const T& c, const cntsum& x) { return {x.a, x.b + c * x.a}; }
cntsum& operator+=(const cntsum& x) { return *this = *this + x; }
cntsum& operator-=(const cntsum& x) { return *this = *this - x; }
cntsum& operator*=(const cntsum& x) { return *this = *this * x; }
};
using CS = cntsum<ll>;
ll h(ll x) {
// [1, x]
ll ans = 0;
ans += x / 3 + x / 5;
x++;
// [0, x)
assert(x < 1LL << 40);
CS now{1, 0};
int r_now = 0;
CS dp[15]{};
rrep(k, 10) {
int xk = x >> (4 * k) & 15;
CS ndp[15]{};
rep(r, 15) rep(v, 16) {
ndp[(r * 16 + v) % 15] += (v == 0xB || v == 0xF) * dp[r];
}
rep(v, xk) ndp[(r_now * 16 + v) % 15] += (v == 0xB || v == 0xF) * now;
r_now = (r_now * 16 + xk) % 15;
if (xk == 0xB || xk == 0xF) now = 1 * now;
copy(all(ndp), dp);
}
rep(r, 15) if (r % 3 && r % 5) ans += dp[r].b;
return ans;
}
ll g(ll x) {
// [1, x]
int k = 0;
ll k16 = 1;
ll res = 0;
while (k16 <= x) {
ll ub = min(16 * k16 - 1, x);
ll lb = k16 - 1;
// (lb, ub]
ll c15 = ub / 15 - lb / 15;
ll c3 = ub / 3 - lb / 3;
ll c5 = ub / 5 - lb / 5;
res += (k + 1) * (ub - lb - c3 - c5 + c15);
res += (c3 + c5) * 4;
k16 *= 16;
k++;
}
return res;
}
ll f(ll x) {
ll l = 0, r = 1;
while (g(r) <= x) l = r, r *= 2;
while (r - l > 1) {
ll c = (l + r) / 2;
(g(c) <= x ? l : r) = c;
}
ll ans = h(l);
string rs;
if (r % 3 && r % 5) {
ll tmp = r;
while (tmp) {
int v = tmp % 16;
tmp /= 16;
rs += v < 10 ? '0' + v : 'A' + (v - 10);
}
reverse(all(rs));
} else {
if (r % 3 == 0) rs += "Fizz";
if (r % 5 == 0) rs += "Buzz";
}
rs = rs.substr(0, x - g(l));
ans += count(all(rs), 'F');
ans += count(all(rs), 'B');
return ans;
}
} int main() {
ios::sync_with_stdio(false);
cin.tie(0);
ll x, y;
cin >> x >> y;
x--;
ll ans = f(y) - f(x);
cout << ans << '\n';
}
Kude