結果
| 問題 |
No.2546 Many Arithmetic Sequences
|
| コンテスト | |
| ユーザー |
 Forested
|
| 提出日時 | 2023-11-24 22:26:14 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 165 ms / 2,000 ms |
| コード長 | 4,261 bytes |
| コンパイル時間 | 1,565 ms |
| コンパイル使用メモリ | 141,852 KB |
| 最終ジャッジ日時 | 2025-02-18 00:19:20 |
|
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 * 3 |
| other | AC * 36 |
コンパイルメッセージ
In file included from /usr/include/c++/13/bits/stl_algobase.h:64,
from /usr/include/c++/13/algorithm:60,
from main.cpp:6:
In member function ‘std::pair<_T1, _T2>& std::pair<_T1, _T2>::operator=(std::__conditional_t<std::__and_<std::is_move_assignable<_Tp>, std::is_move_assignable<_T2> >::value, std::pair<_T1, _T2>&&, std::__nonesuch&&>) [with _T1 = int; _T2 = long long int]’,
inlined from ‘monotone_minima<long long int, std::greater<void> >(int, int, const std::function<long long int(int, int)>&, const std::greater<void>&)::<lambda(int, int, int, int)>’ at main.cpp:127:14,
inlined from ‘constexpr _Res std::__invoke_impl(__invoke_other, _Fn&&, _Args&& ...) [with _Res = void; _Fn = monotone_minima<long long int, std::greater<void> >(int, int, const std::function<long long int(int, int)>&, const std::greater<void>&)::<lambda(int, int, int, int)>&; _Args = {int, int, int, int}]’ at /usr/include/c++/13/bits/invoke.h:61:36,
inlined from ‘constexpr std::enable_if_t<is_invocable_r_v<_Res, _Callable, _Args ...>, _Res> std::__invoke_r(_Callable&&, _Args&& ...) [with _Res = void; _Callable = monotone_minima<long long int, std::greater<void> >(int, int, const std::function<long long int(int, int)>&, const std::greater<void>&)::<lambda(int, int, int, int)>&; _Args = {int, int, int, int}]’ at /usr/include/c++/13/bits/invoke.h:111:28,
inlined from ‘static _Res std::_Function_handler<_Res(_ArgTypes ...), _Functor>::_M_invoke(const std::_Any_data&, _ArgTypes&& ...) [with _Res = void; _Functor = monotone_minima<long long int, std::greater<void> >(int, int, const std::function<long long int(int, int)>&, const std::greater<void>&)::<lambda(int, int, int, int)>; _ArgTypes = {int, int, int, int}]’ at /usr/include/c++/13/bits/std_function.h:290:30:
/usr/include/c++/13/bits/stl_pair.h:744:16: warning: ‘ma’ may be used uninitialized [-Wmaybe-uninitialized]
744 | second = std::forward<second_type>(__p.second)
ソースコード
#ifndef LOCAL
#define FAST_IO
#endif
// ============
#include <algorithm>
#include <array>
#include <bitset>
#include <cassert>
#include <cmath>
#include <cstring>
#include <iomanip>
#include <iostream>
#include <list>
#include <map>
#include <numeric>
#include <queue>
#include <random>
#include <set>
#include <stack>
#include <string>
#include <tuple>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
#include <functional>
#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 PER(i, n) for (i32 i = (i32)(n) - 1; i >= 0; --i)
#define ALL(x) begin(x), end(x)
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;
template <typename T>
using Vec = vector<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;
}
#ifdef INT128
using u128 = __uint128_t;
using i128 = __int128_t;
istream &operator>>(istream &is, i128 &x) {
i64 v;
is >> v;
x = v;
return is;
}
ostream &operator<<(ostream &os, i128 x) {
os << (i64)x;
return os;
}
istream &operator>>(istream &is, u128 &x) {
u64 v;
is >> v;
x = v;
return is;
}
ostream &operator<<(ostream &os, u128 x) {
os << (u64)x;
return os;
}
#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;
// ============
#ifdef DEBUGF
#else
#define DBG(x) (void) 0
#endif
// https://ei1333.github.io/library/dp/monotone-minima.hpp
template< typename T, typename Compare = less< T > >
vector< pair< int, T > > monotone_minima(int H, int W, const function< T(int, int) > &f, const Compare &comp = Compare()) {
vector< pair< int, T > > dp(H);
function< void(int, int, int, int) > dfs = [&](int top, int bottom, int left, int right) {
if(top > bottom) return;
int line = (top + bottom) / 2;
T ma;
int mi = -1;
for(int i = left; i <= right; i++) {
T cst = f(line, i);
if(mi == -1 || comp(cst, ma)) {
ma = cst;
mi = i;
}
}
dp[line] = make_pair(mi, ma);
dfs(top, line - 1, left, mi);
dfs(line + 1, bottom, mi, right);
};
dfs(0, H - 1, 0, W - 1);
return dp;
}
int main() {
i32 n, m;
cin >> n >> m;
Vec<i64> a(n), d(n);
REP(i, n) {
cin >> a[i] >> d[i];
}
Vec<i32> plus, minus;
REP(i, n) {
if (d[i] > 0) {
plus.push_back(i);
} else {
minus.push_back(i);
}
}
Vec<i64> pct(m + 1, -INF64);
pct[0] = 0;
if (!minus.empty()) {
priority_queue<pair<i64, i32>> pq;
Vec<i32> cnt(n, 0);
for (i32 i : minus) {
pq.emplace(a[i] + cnt[i] * d[i], i);
}
REP(i, m) {
auto [val, idx] = pq.top();
pq.pop();
pct[i + 1] = pct[i] + val;
++cnt[idx];
pq.emplace(a[idx] + cnt[idx] * d[idx], idx);
}
}
DBG(pct);
Vec<i64> prob(m + 1, -INF64);
prob[0] = 0;
if (!plus.empty()) {
sort(ALL(plus), [&](i32 i, i32 j) -> bool {
return d[i] < d[j];
});
DBG(plus);
const auto get = [&](i32 i, i32 j) -> i64 {
i32 idx = plus[j];
i64 first = a[idx];
i64 last = a[idx] + d[idx] * (i - 1);
return (first + last) * i / 2;
};
auto ret = monotone_minima<i64, greater<>>(m + 1, (i32)plus.size(), get);
REP(i, m + 1) {
prob[i] = ret[i].second;
}
}
DBG(prob);
i64 ans = -INF64;
REP(i, m + 1) {
chmax(ans, pct[i] + prob[m - i]);
}
cout << ans << '\n';
}