結果
| 問題 | No.3642 OHO SHI KA TSU(Buying ver.) |
| コンテスト | |
| ユーザー |
Forested
|
| 提出日時 | 2026-08-25 15:43:05 |
| 言語 | C++23 (gcc 15.2.0 + boost 1.90.0) |
| 結果 |
AC
|
| 実行時間 | 1,684 ms / 2,000 ms |
| + 832µs | |
| コード長 | 5,352 bytes |
| 記録 | |
| コンパイル時間 | 2,306 ms |
| コンパイル使用メモリ | 338,680 KB |
| 実行使用メモリ | 6,272 KB |
| 最終ジャッジ日時 | 2026-08-25 15:43:15 |
| 合計ジャッジ時間 | 9,164 ms |
|
ジャッジサーバーID (参考情報) |
judge2_1 / judge3_0 |
(要ログイン)
| サブタスク | 配点 | 結果 |
|---|---|---|
| 小課題1 | 5 % | AC * 4 |
| 小課題2 | 3 % | AC * 3 |
| 小課題3 | 2 % | AC * 3 |
| 小課題4 | 10 % | AC * 3 |
| 小課題5 | 15 % | AC * 3 |
| 小課題6 | 20 % | AC * 3 |
| 小課題7 | 30 % | AC * 3 |
| 小課題8 | 15 % | AC * 31 |
| 合計 | 100 点 |
ソースコード
#ifndef LOCAL
#define FAST_IO
#endif
// ============
#include <bits/stdc++.h>
#define OVERRIDE(a, b, c, d, ...) d
#define REP2(i, n) for (i32 i = 0; i < (i32)(n); ++i)
#define REP3(i, m, n) for (i32 i = (i32)(m); i < (i32)(n); ++i)
#define REP(...) OVERRIDE(__VA_ARGS__, REP3, REP2)(__VA_ARGS__)
#define PER2(i, n) for (i32 i = (i32)(n)-1; i >= 0; --i)
#define PER3(i, m, n) for (i32 i = (i32)(n)-1; i >= (i32)(m); --i)
#define PER(...) OVERRIDE(__VA_ARGS__, PER3, PER2)(__VA_ARGS__)
#define ALL(x) begin(x), end(x)
#define LEN(x) (i32)(x.size())
using namespace std;
using u32 = unsigned int;
using u64 = unsigned long long;
using i32 = signed int;
using i64 = signed long long;
using f64 = double;
using f80 = long double;
using pi = pair<i32, i32>;
using pl = pair<i64, i64>;
template <typename T>
using V = vector<T>;
template <typename T>
using VV = V<V<T>>;
template <typename T>
using VVV = V<V<V<T>>>;
template <typename T>
using VVVV = V<V<V<V<T>>>>;
template <typename T>
using PQR = priority_queue<T, V<T>, greater<T>>;
template <typename T>
bool chmin(T &x, const T &y) {
if (x > y) {
x = y;
return true;
}
return false;
}
template <typename T>
bool chmax(T &x, const T &y) {
if (x < y) {
x = y;
return true;
}
return false;
}
template <typename T>
i32 lob(const V<T> &arr, const T &v) {
return (i32)(lower_bound(ALL(arr), v) - arr.begin());
}
template <typename T>
i32 upb(const V<T> &arr, const T &v) {
return (i32)(upper_bound(ALL(arr), v) - arr.begin());
}
template <typename T>
V<i32> argsort(const V<T> &arr) {
V<i32> ret(arr.size());
iota(ALL(ret), 0);
sort(ALL(ret), [&](i32 i, i32 j) -> bool {
if (arr[i] == arr[j]) {
return i < j;
} else {
return arr[i] < arr[j];
}
});
return ret;
}
#ifdef INT128
using u128 = __uint128_t;
using i128 = __int128_t;
#endif
[[maybe_unused]] constexpr i32 INF = 1000000100;
[[maybe_unused]] constexpr i64 INF64 = 3000000000000000100;
struct SetUpIO {
SetUpIO() {
#ifdef FAST_IO
ios::sync_with_stdio(false);
cin.tie(nullptr);
#endif
cout << fixed << setprecision(15);
}
} set_up_io;
void scan(char &x) { cin >> x; }
void scan(u32 &x) { cin >> x; }
void scan(u64 &x) { cin >> x; }
void scan(i32 &x) { cin >> x; }
void scan(i64 &x) { cin >> x; }
void scan(f64 &x) { cin >> x; }
void scan(string &x) { cin >> x; }
template <typename T>
void scan(V<T> &x) {
for (T &ele : x) {
scan(ele);
}
}
void read() {}
template <typename Head, typename... Tail>
void read(Head &head, Tail &...tail) {
scan(head);
read(tail...);
}
#define CHAR(...) \
char __VA_ARGS__; \
read(__VA_ARGS__);
#define U32(...) \
u32 __VA_ARGS__; \
read(__VA_ARGS__);
#define U64(...) \
u64 __VA_ARGS__; \
read(__VA_ARGS__);
#define I32(...) \
i32 __VA_ARGS__; \
read(__VA_ARGS__);
#define I64(...) \
i64 __VA_ARGS__; \
read(__VA_ARGS__);
#define F64(...) \
f64 __VA_ARGS__; \
read(__VA_ARGS__);
#define STR(...) \
string __VA_ARGS__; \
read(__VA_ARGS__);
#define VEC(type, name, size) \
V<type> name(size); \
read(name);
#define VVEC(type, name, size1, size2) \
VV<type> name(size1, V<type>(size2)); \
read(name);
// ============
#ifdef DEBUGF
#else
#define DBG(...) (void)0
#endif
void solve() {
I32(n, x, y);
V<i32> w(n), v(n), cs(n), c(n);
REP(i, n) {
read(w[i], v[i], c[i]);
}
auto judge = [&](double m) -> bool {
REP(i, n) {
if (v[i] - m * w[i] >= 0) {
return true;
}
}
V<f64> dp(x, -1E10);
REP(i, n) {
i32 cc = c[i], ww = w[i] % x;
double vv = v[i] - m * w[i] + y * (w[i] / x);
DBG(cc, ww, vv);
V<f64> ndp = dp;
REP(j, x) {
i32 pos = j;
double g = dp[j];
REP(j, cc) {
pos += ww;
g += vv;
if (pos >= x) {
pos -= x;
g += y;
}
chmax(ndp[pos], g);
}
}
dp = ndp;
DBG(dp);
{
i32 pos = 0;
double g = 0;
REP(j, cc) {
pos += ww;
g += vv;
if (pos >= x) {
pos -= x;
g += y;
}
chmax(dp[pos], g);
}
}
DBG(dp);
if (*max_element(ALL(dp)) >= 0) {
return true;
}
}
return false;
};
if (judge(1)) {
double ok = 1, ng = 1000, error = 1E-6;
while (ng - ok > error) {
double mid = sqrt(ok * ng);
(judge(mid) ? ok : ng) = mid;
error = ok * 1E-6;
}
cout << ok << '\n';
} else {
double ok = 0, ng = 1;
while (ng - ok > 1E-6) {
double mid = (ok + ng) / 2;
(judge(mid) ? ok : ng) = mid;
}
cout << ok << '\n';
}
}
int main() {
i32 t = 1;
// cin >> t;
while (t--) {
solve();
}
}
Forested