Submission #667955

#	Time	Username	Problem	Language	Result	Execution time	Memory
667955		600Mihnea	Board (CEOI13_board)	C++17	40 / 100	3 ms	1492 KiB

board

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

ll nxt(ll a, char ch)
{
  if (ch == '1') return 2 * a;
  if (ch == '2') return 2 * a + 1;
  if (ch == 'U') return a / 2;
  if (ch == 'L') return a - 1;
  if (ch == 'R') return a + 1;
  assert(0);

}

ll nxt(ll a, string s)
{
  for (auto &ch : s)
  {
    a = nxt(a, ch);
  }
  return a;
}

int get_level(ll x)
{
  if (x == 1)
  {
    return 1;
  }
  else
  {
    assert(x >= 2);
    return 1 + get_level(x / 2);
  }
}

ll solve(ll a, ll b)
{
  if (a == b)
  {
    return 0;
  }
  if (get_level(b) > get_level(a))
  {
    return 1 + solve(a, b / 2);
  }
  if (get_level(a) > get_level(b))
  {
    return 1 + solve(a / 2, b);
  }
  assert(get_level(a) == get_level(b));
  return min(abs(a - b), 2 + solve(a / 2, b / 2));
}

int main()
{
#ifdef ONPC
  freopen ("input.txt", "r", stdin);
#endif // ONPC

#ifndef ONPC
  ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#endif // ONPC

  string s, t;
  cin >> s >> t;
  ll a = nxt(1, s);
  ll b = nxt(1, t);
  cout << solve(a, b) << "\n";

  return 0;
}
/**
**/

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10