Submission #956503

#	Time	Username	Problem	Language	Result	Execution time	Memory
956503		arush_agu	Board (CEOI13_board)	C++17	70 / 100	1089 ms	964 KiB

board

#include <algorithm>
#include <cctype>
#include <cmath>
#include <cstdio>
#include <cstring>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <functional>
#include <iomanip>
#include <iostream>
#include <iterator>
#include <list>
#include <map>
#include <numeric>
#include <queue>
#include <random>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <vector>

#ifdef DEBUG
#include <time.h>
#endif

#define all(a) (a).begin(), (a).end()
#define rev(a) (a).rbegin(), (a).rend()
#define F first
#define S second
int recur_depth = 0;
#ifdef DEBUG
#define dbg(x)                                                                 \
  {                                                                            \
    ++recur_depth;                                                             \
    auto x_ = x;                                                               \
    --recur_depth;                                                             \
    cerr << string(recur_depth, '\t') << "\e[91m" << __func__ << ":"           \
         << __LINE__ << "\t" << #x << " = " << x_ << "\e[39m" << endl;         \
  }
#else
#define dbg(x)
#endif

using namespace std;
using namespace __gnu_pbds;

typedef pair<int, int> ii;

typedef long long ll;
typedef long double ld;
typedef pair<ll, ll> llll;

typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<pair<int, int>> vii;
typedef vector<vii> vvii;

typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<pair<ll, ll>> vll;
typedef vector<vll> vvll;

typedef vector<bool> vb;

template <class type1>
using ordered_set = tree<type1, null_type, less<type1>, rb_tree_tag,
                         tree_order_statistics_node_update>;

template <typename A, typename B>
ostream &operator<<(ostream &os, const pair<A, B> &p) {
  return os << '(' << p.first << ", " << p.second << ')';
}
template <typename T_container, typename T = typename enable_if<
                                    !is_same<T_container, string>::value,
                                    typename T_container::value_type>::type>
ostream &operator<<(ostream &os, const T_container &v) {
  os << '{';
  string sep;
  for (const T &x : v)
    os << sep << x, sep = ", ";
  return os << '}';
}

const ll MOD = 1e9 + 7;
// const ll MOD = 998244353;
const ll INF = 1e9;
const ld EPS = 1e-9;

void solve() {
  string a, b;
  cin >> a >> b;

  auto shorten = [&](string curr) {
    string ans = "";
    int depth = 0;

    for (int i = 0; i < curr.size(); i++) {
      if (curr[i] == '1')
        ans.push_back('1'), depth++;
      else if (curr[i] == '2')
        ans.push_back('2'), depth++;
      else if (curr[i] == 'U')
        ans.pop_back(), depth--;
      else if (curr[i] == 'L') {
        int curr_depth = depth;
        while (ans.back() == '1')
          ans.pop_back(), curr_depth--;
        ans.pop_back();
        ans.push_back('1');
        while (curr_depth < depth)
          ans.push_back('2'), curr_depth++;
      } else if (curr[i] == 'R') {
        int curr_depth = depth;
        while (ans.back() == '2')
          ans.pop_back(), curr_depth--;
        ans.pop_back();
        ans.push_back('2');
        while (curr_depth < depth)
          ans.push_back('1'), curr_depth++;
      }
    }

    return ans;
  };

  a = shorten(a), b = shorten(b);
  if (a == b) {
    cout << "0\n";
    return;
  }

  if (a > b)
    swap(a, b);

  int depth_a = a.size(), depth_b = b.size();

  int best = INF;
  int hor_dist = 0;
  for (int depth = 0; depth <= min(depth_a, depth_b); depth++) {
    int curr = depth_a - depth + depth_b - depth + hor_dist;
    best = min(best, curr);

    hor_dist *= 2;
    if (a[depth] != b[depth])
      hor_dist += a[depth] == '1' ? 1 : -1;
    if (hor_dist > 1e6 + 10)
      break;
  }

  cout << best << "\n";
}

int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(NULL);

  clock_t start = clock();

  int test_cases = 1;
  // cin >> test_cases;

  while (test_cases--)
    solve();

#ifdef DEBUG
  cerr << fixed << setprecision(10)
       << "\nTime Taken: " << (double)(clock() - start) / CLOCKS_PER_SEC
       << "s\n";
#endif
  return 0;
}

Compilation message (stderr)

board.cpp: In lambda function:
board.cpp:100:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  100 |     for (int i = 0; i < curr.size(); i++) {
      |                     ~~^~~~~~~~~~~~~
board.cpp: In function 'int main()':
board.cpp:160:11: warning: unused variable 'start' [-Wunused-variable]
  160 |   clock_t start = clock();
      |           ^~~~~

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