oj.uz

Submission #255913

# Submission time Handle Problem Language Result Execution time Memory
255913 2020-08-02T05:37:31 Z KoD Duathlon (APIO18_duathlon) C++17
23 / 100
 189 ms 18476 KB 
#line 1 "main.cpp"

/**
 * @title Template
 */

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

#line 2 "/Users/kodamankod/Desktop/Programming/Library/other/chmin_chmax.cpp"

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

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

/**
 * @title Chmin/Chmax
 */
#line 2 "/Users/kodamankod/Desktop/Programming/Library/other/range.cpp"

#line 4 "/Users/kodamankod/Desktop/Programming/Library/other/range.cpp"

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

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

  };

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

  };
  
private:
  const iterator M_first, M_last;

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

};

/**
 * @title Range
 */
#line 2 "/Users/kodamankod/Desktop/Programming/Library/other/rev.cpp"

#include <type_traits>
#include <iterator>
#line 6 "/Users/kodamankod/Desktop/Programming/Library/other/rev.cpp"

template <class T>
class rev_impl {
public:
  using iterator = typename std::decay<T>::type::reverse_iterator;

private:
  const iterator M_begin;
  const iterator M_end;

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

};

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

/**
 * @title Reverser
 */
#line 2 "/Users/kodamankod/Desktop/Programming/Library/other/fix_point.cpp"

#line 4 "/Users/kodamankod/Desktop/Programming/Library/other/fix_point.cpp"

template <class Func>
struct fix_point: private Func {
  explicit constexpr fix_point(Func &&func): Func(std::forward<Func>(func)) { }
  template <class... Args>
  constexpr decltype(auto) operator () (Args &&... args) const {
    return Func::operator()(*this, std::forward<Args>(args)...);
  }
};

template <class Func>
constexpr decltype(auto) make_fix_point(Func &&func) {
  return fix_point<Func>(std::forward<Func>(func));
}

/**
 * @title Lambda Recursion
 */
#line 17 "main.cpp"

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;

int main() {
  i32 N, M;
  std::cin >> N >> M;
  std::vector<std::vector<i32>> graph(N);
  for (auto i: range(0, M)) {
    i32 u, v;
    std::cin >> u >> v;
    --u; --v;
    graph[u].push_back(v);
    graph[v].push_back(u);
  }
  std::vector<std::vector<i32>> count(N);
  for (auto i: range(0, N)) {
    count[i].resize(graph[i].size());
  }
  std::vector<bool> visited(N);
  i64 ans = 0;
  for (auto root: range(0, N)) {
    if (visited[root]) {
      continue;
    }
    i32 size = fix_point([&](auto dfs, i32 u) -> i32 {
      visited[u] = true;
      i32 res = 1;
      for (auto i: range(0, graph[u].size())) {
        i32 v = graph[u][i];
        if (visited[v]) {
          continue;
        }
        count[u][i] = dfs(v);
        res += count[u][i];
      }
      return res;
    })(root);
    fix_point([&](auto dfs, i32 u, i32 up) -> void {
      for (auto i: range(0, graph[u].size())) {
        if (count[u][i] == 0) {
          count[u][i] = up;
        }
        else {
          dfs(graph[u][i], size - count[u][i]);
        }
      }
      for (auto x: count[u]) {
        ans += (i64) x * (size - x - 1);
      }
    })(root, 0);
  }
  std::cout << ans << '\n';
  return 0;
}

Compilation message

main.cpp: In function 'int main()':
main.cpp:30:13: warning: unused variable 'i' [-Wunused-variable]

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 256 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 256 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 189 ms 18476 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 512 KB Output is correct
5 Correct 1 ms 512 KB Output is correct
6 Correct 1 ms 512 KB Output is correct
7 Correct 1 ms 512 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 2 ms 384 KB Output is correct

Subtask #5
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 154 ms 12664 KB Output is correct
2 Correct 172 ms 12792 KB Output is correct
3 Correct 173 ms 12792 KB Output is correct
4 Correct 167 ms 12664 KB Output is correct
5 Correct 148 ms 12664 KB Output is correct
6 Correct 159 ms 15736 KB Output is correct
7 Correct 160 ms 14712 KB Output is correct
8 Correct 166 ms 14204 KB Output is correct
9 Correct 166 ms 13816 KB Output is correct
10 Correct 147 ms 12664 KB Output is correct
11 Correct 144 ms 12664 KB Output is correct
12 Correct 147 ms 12664 KB Output is correct
13 Correct 150 ms 12664 KB Output is correct
14 Correct 128 ms 12408 KB Output is correct
15 Correct 123 ms 12008 KB Output is correct
16 Correct 75 ms 10360 KB Output is correct
17 Correct 118 ms 13428 KB Output is correct
18 Correct 117 ms 13408 KB Output is correct
19 Correct 115 ms 13296 KB Output is correct
20 Correct 116 ms 13304 KB Output is correct

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Incorrect 2 ms 384 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 160 ms 12740 KB Output is correct
2 Correct 155 ms 12664 KB Output is correct
3 Incorrect 170 ms 12792 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 256 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 256 KB Output isn't correct
2 Halted 0 ms 0 KB -