Submission #868142

#	Time	Username	Problem	Language	Result	Execution time	Memory
868142		evenvalue	Newspapers (CEOI21_newspapers)	C++17	6 / 100	1 ms	600 KiB

newspapers

#include <bits/stdc++.h>
using namespace std;

#ifdef evenvalue
  #include "debug.h"
  #define debug(...) print(#__VA_ARGS__, __VA_ARGS__)
#else
  #define debug(...)
#endif

using int64 = long long;
using ld = long double;

template<typename T>
using min_heap = priority_queue<T, vector<T>, greater<T>>;
template<typename T>
using max_heap = priority_queue<T, vector<T>, less<T>>;

namespace read {
int Int() {
  int x;
  cin >> x;
  return x;
}
int64 Int64() {
  int64 x;
  cin >> x;
  return x;
}
char Char() {
  char c;
  cin >> c;
  return c;
}
string String() {
  string s;
  cin >> s;
  return s;
}
double Double() {
  return stod(String());
}
ld LongDouble() {
  return stold(String());
}
template<typename T1, typename T2>
pair<T1, T2> Pair() {
  pair<T1, T2> p;
  cin >> p.first >> p.second;
  return p;
}
template<typename T>
vector<T> Vec(const int n) {
  vector<T> v(n);
  for (T &x : v) {
    cin >> x;
  }
  return v;
}
template<typename T>
vector<vector<T>> VecVec(const int n, const int m) {
  vector<vector<T>> v(n);
  for (vector<T> &vec : v) {
    vec = Vec<T>(m);
  }
  return v;
}
}//namespace read

constexpr int kInf = 1e9 + 10;
constexpr int64 kInf64 = 1e15 + 10;
constexpr int kMod = 1e9 + 7;
constexpr int kMaxN = 2e5 + 10;

inline void solution() {
  const int n = read::Int();
  const int m = read::Int();

  if (m != n - 1) {
    cout << "NO\n";
    return;
  }

  //subtask: stick
  deque<int> ans;
  for (int i = n - 1; i >= 2; i--) {
    ans.push_front(i);
    ans.push_back(i);
  }
  ans.push_front(2);

  if (n == 1) {
    ans = {1};
  } else if (n == 2 or n == 3) {
    ans = {2, 2};
  }

  cout << "YES\n";
  cout << ans.size() << '\n';
  for (const int x : ans) {
    cout << x << ' ';
  }
}

int32_t main() {
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr);

  //freopen(".in", "r", stdin);
  //freopen(".out", "w", stdout);

  cout << fixed << setprecision(10);

  int testcases = 1;
  //cin >> testcases;
  while (testcases--) {
    solution();
  }
}

• Subtask 1: 0 / 12
• Subtask 2: 6 / 8
• Subtask 3: 0 / 80