結果
| 問題 | No.957 植林 |
| コンテスト | |
| ユーザー |
noshi91
|
| 提出日時 | 2019-12-19 23:13:36 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.89.0) |
| 結果 |
AC
|
| 実行時間 | 299 ms / 2,000 ms |
| コード長 | 5,085 bytes |
| 記録 | |
| コンパイル時間 | 1,870 ms |
| コンパイル使用メモリ | 84,844 KB |
| 最終ジャッジ日時 | 2025-01-08 12:59:07 |
|
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 45 |
ソースコード
//#define NDEBUG
#include <algorithm>
#include <cstddef>
#include <cstdint>
#include <iostream>
#include <utility>
#include <vector>
namespace n91 {
using i8 = std::int_fast8_t;
using i32 = std::int_fast32_t;
using i64 = std::int_fast64_t;
using u8 = std::uint_fast8_t;
using u32 = std::uint_fast32_t;
using u64 = std::uint_fast64_t;
using isize = std::ptrdiff_t;
using usize = std::size_t;
struct rep {
struct itr {
usize i;
constexpr itr(const usize i) noexcept : i(i) {}
void operator++() noexcept { ++i; }
constexpr usize operator*() const noexcept { return i; }
constexpr bool operator!=(const itr x) const noexcept { return i != x.i; }
};
const itr f, l;
constexpr rep(const usize f, const usize l) noexcept
: f(std::min(f, l)), l(l) {}
constexpr auto begin() const noexcept { return f; }
constexpr auto end() const noexcept { return l; }
};
struct revrep {
struct itr {
usize i;
constexpr itr(const usize i) noexcept : i(i) {}
void operator++() noexcept { --i; }
constexpr usize operator*() const noexcept { return i; }
constexpr bool operator!=(const itr x) const noexcept { return i != x.i; }
};
const itr f, l;
constexpr revrep(const usize f, const usize l) noexcept
: f(l - 1), l(std::min(f, l) - 1) {}
constexpr auto begin() const noexcept { return f; }
constexpr auto end() const noexcept { return l; }
};
template <class T> auto md_vec(const usize n, const T &value) {
return std::vector<T>(n, value);
}
template <class... Args> auto md_vec(const usize n, Args... args) {
return std::vector<decltype(md_vec(args...))>(n, md_vec(args...));
}
template <class T> constexpr T difference(const T &a, const T &b) noexcept {
if (a < b) {
return b - a;
} else {
return a - b;
}
}
template <class T> void chmin(T &a, const T &b) noexcept {
if (b < a) {
a = b;
}
}
template <class T> void chmax(T &a, const T &b) noexcept {
if (a < b) {
a = b;
}
}
template <class F> class fix_point : private F {
public:
explicit constexpr fix_point(F &&f) : F(std::forward<F>(f)) {}
template <class... Args>
constexpr decltype(auto) operator()(Args &&... args) const {
return F::operator()(*this, std::forward<Args>(args)...);
}
};
template <class F> constexpr decltype(auto) make_fix(F &&f) {
return fix_point<F>(std::forward<F>(f));
}
template <class T> T scan() {
T ret;
std::cin >> ret;
return ret;
}
} // namespace n91
#include <cstdlib>
#ifndef NIMI_GRAPH_MAXFLOW_DINIC
#define NIMI_GRAPH_MAXFLOW_DINIC
#include <algorithm>
#include <array>
#include <limits>
#include <queue>
namespace nimi {
template <class C, std::size_t N>
using maxflow_array_matrix = std::array<std::array<C, N>, N>;
template <class C, std::size_t N>
C dinic(maxflow_array_matrix<C, N> &g, std::size_t s, std::size_t t) {
using size_t = std::size_t;
constexpr C Inf = std::numeric_limits<C>::max();
C ans = 0;
std::array<size_t, N> level;
std::array<size_t, N> iter;
const auto g_level = [&]() {
std::fill(level.begin(), level.end(), N);
std::queue<size_t> que;
que.push(s);
level[s] = 0;
while (!que.empty()) {
const size_t v = que.front();
que.pop();
for (size_t i = 0; i != N; i += 1) {
if (g[v][i] != 0 && level[i] == N) {
level[i] = level[v] + 1;
que.push(i);
}
}
}
};
const auto dinic_dfs = [&](const auto &dinic_dfs, const size_t v,
const C f) -> C {
if (v == t)
return f;
C now = f;
for (size_t &i = iter[v]; i != N; i += 1) {
if (g[v][i] != 0 && level[i] > level[v]) {
const C ff = dinic_dfs(dinic_dfs, i, std::min(now, g[v][i]));
g[v][i] -= ff;
g[i][v] += ff;
now -= ff;
if (now == 0)
return f;
}
}
return f - now;
};
while (true) {
g_level();
if (level[t] == N)
break;
std::fill(iter.begin(), iter.end(), 0);
int cnt = 0;
while (true) {
cnt += 1;
const C f = dinic_dfs(dinic_dfs, s, Inf);
if (f == 0)
break;
ans += f;
}
if (cnt > 2) {
std::abort();
}
}
return ans;
}
} // namespace nimi
#endif
#include <algorithm>
#include <iostream>
#include <utility>
#include <vector>
namespace n91 {
void main_() {
//*
std::ios::sync_with_stdio(false);
std::cin.tie(nullptr);
//*/
const usize h = scan<usize>();
const usize w = scan<usize>();
nimi::maxflow_array_matrix<u64, 602> g = {};
const usize s = h + w;
const usize t = h + w + 1;
for (const usize i : rep(0, h)) {
for (const usize j : rep(0, w)) {
const u64 c = scan<u64>();
g[i][h + j] += c;
g[s][i] += c;
}
}
u64 ans = 0;
for (const usize i : rep(0, h)) {
const u64 c = scan<u64>();
ans += c;
g[i][t] += c;
}
for (const usize i : rep(0, w)) {
const u64 c = scan<u64>();
ans += c;
g[h + i][t] += c;
}
std::cout << ans - nimi::dinic(g, s, t) << std::endl;
}
} // namespace n91
int main() {
n91::main_();
return 0;
}
noshi91