oj.uz

답안 #262663

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
262663 2020-08-13T06:42:41 Z KoD Fireworks (APIO16_fireworks) C++11
19 / 100
 30 ms 8776 KB 
/**
 * @title Template
 */

#include <iostream>
#include <algorithm>
#include <utility>
#include <numeric>
#include <vector>
#include <array>
#include <cassert>
#include <iomanip>


template <class T, class U>
bool chmin(T &lhs, const U &rhs) {
  if (lhs > rhs) { 
    lhs = rhs; 
    return true; 
  }
  return false;
}

template <class T, class U>
bool chmax(T &lhs, const U &rhs) {
  if (lhs < rhs) { 
    lhs = rhs; 
    return true; 
  }
  return false;
}

/**
 * @title Chmin/Chmax
 */


class range {
public:
  class iterator {
  private:
    int64_t M_position;

  public:
    iterator(int64_t position) noexcept: M_position(position) { }
    void operator ++ () noexcept { ++M_position; }
    bool operator != (iterator other) const noexcept { return M_position != other.M_position; }
    int64_t operator * () const noexcept { return M_position; }

  };

  class reverse_iterator {
  private:
    int64_t M_position;
  
  public:
    reverse_iterator(int64_t position) noexcept: M_position(position) { }
    void operator ++ () noexcept { --M_position; }
    bool operator != (reverse_iterator other) const noexcept { return M_position != other.M_position; }
    int64_t operator * () const noexcept { return M_position; }

  };
  
private:
  const iterator M_first, M_last;

public:
  range(int64_t first, int64_t last) noexcept: M_first(first), M_last(std::max(first, last)) { }
  iterator begin() const noexcept { return M_first; }
  iterator end() const noexcept { return M_last; }
  reverse_iterator rbegin() const noexcept { return reverse_iterator(*M_last - 1); } 
  reverse_iterator rend() const noexcept { return reverse_iterator(*M_first - 1); } 

};

/**
 * @title Range
 */

#include <type_traits>
#include <iterator>

template <class T>
class rev_impl {
public:
  using iterator = decltype(std::declval<T>().rbegin());

private:
  const iterator M_begin;
  const iterator M_end;

public:
  rev_impl(T &&cont) noexcept: M_begin(cont.rbegin()), M_end(cont.rend()) { }
  iterator begin() const noexcept { return M_begin; }
  iterator end() const noexcept { return M_end; }

};

template <class T>
rev_impl<T> rev(T &&cont) {
  return rev_impl<T>(std::forward<T>(cont));
}

/**
 * @title Reverser
 */

using i32 = int32_t;
using i64 = int64_t;
using u32 = uint32_t;
using u64 = uint64_t;

constexpr i32 inf32 = (i32(1) << 30) - 1;
constexpr i64 inf64 = (i64(1) << 62) - 1;

i32 N, M, V;
std::array<i32, 300000> P, C;

struct edge_t {
  const i32 to;
  const i32 cost;
  edge_t(i32 to_, i32 cost_): to(to_), cost(cost_) { }
};

std::array<std::vector<edge_t>, 300000> graph;
std::array<std::array<i64, 301>, 300> dp;

void dfs(i32 u) {
  if (u >= N) {
    dp[u].fill(inf64);
    dp[u][0] = 0;
    return;
  }
  for (auto p: graph[u]) {
    const i32 v = p.to;
    if (v != P[u]) {
      dfs(v);
      std::array<i64, 301> next;
      next.fill(inf64);
      for (auto j: range(0, 301)) {
        for (auto k: range(0, 301 - j)) {
          chmin(next[j + k], dp[v][j] + std::abs(p.cost - k));
        }
      }
      for (auto j: range(0, 301)) {
        dp[u][j] += next[j];
      }
    }
  }
}

int main() {
  std::cin >> N >> M;
  V = N + M;
  --P[0];
  for (auto i: range(1, V)) {
    std::cin >> P[i] >> C[i];
    --P[i];
    graph[P[i]].emplace_back(i, C[i]);
    graph[i].emplace_back(P[i], C[i]);
  }
  if (N == 1) {
    std::sort(C.begin(), C.end());
    i32 goal = C[C.size() / 2];
    i64 ans = 0;
    for (auto x: C) {
      ans += std::abs(goal - x);
    }
    std::cout << ans << '\n';
  }
  else if (V <= 300) {
    dfs(0);
    i64 ans = inf64;
    for (auto j: range(0, 301)) {
      chmin(ans, dp[0][j]);
    }
    std::cout << ans << '\n';
  }
  return 0;
}

Subtask #1
0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 10 ms 8576 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
19.0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 7424 KB Output is correct
2 Correct 9 ms 7424 KB Output is correct
3 Correct 9 ms 7552 KB Output is correct
4 Correct 12 ms 7808 KB Output is correct
5 Correct 15 ms 7680 KB Output is correct
6 Correct 14 ms 7652 KB Output is correct
7 Correct 16 ms 7808 KB Output is correct
8 Correct 18 ms 7808 KB Output is correct
9 Correct 20 ms 7808 KB Output is correct
10 Correct 20 ms 7936 KB Output is correct
11 Correct 22 ms 7936 KB Output is correct
12 Correct 28 ms 8068 KB Output is correct
13 Correct 24 ms 8096 KB Output is correct
14 Correct 26 ms 8776 KB Output is correct
15 Correct 30 ms 8192 KB Output is correct
16 Correct 26 ms 8192 KB Output is correct
17 Correct 26 ms 8064 KB Output is correct
18 Correct 26 ms 8064 KB Output is correct
19 Correct 26 ms 8064 KB Output is correct

Subtask #3
0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 10 ms 8576 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 45.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 10 ms 8576 KB Output isn't correct
2 Halted 0 ms 0 KB -