Submission #320657

#	Time	Username	Problem	Language	Result	Execution time	Memory
320657		monus1042	Board (CEOI13_board)	C++17	40 / 100	2 ms	876 KiB

board

// NK
#include <bits/stdc++.h>

//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
//using namespace __gnu_pbds;

typedef pair<int,int> ii;
typedef long long ll;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<ll> vll;
#define pb push_back
#define eb emplace_back
#define pob pop_back
#define psf push_front
#define pof pop_front
#define mkp make_pair
#define mkt make_tuple
#define all(x) x.begin(), x.end()
#define Bolivia_is_nice ios::sync_with_stdio(false), cin.tie(nullptr)

//typedef tree<ii, null_type, less<ii>, rb_tree_tag, tree_order_statistics_node_update> ord_set;

ll locationof(string s, ll nod, ll & lev){
	for (int i=0; i<s.size(); i++){
		if (s[i] == '1'){
			nod = nod*2;
		    lev++;
		}else if (s[i] == '2'){
			nod = nod*2 + 1;
			lev++;
		}else if (s[i] == 'U'){
			nod = nod / 2;
			--lev;
		}else if (s[i] == 'L'){
			nod = nod - 1;
		}else{ // R
			nod = nod + 1;
		}
	}
	return nod;
}

void solve(){
	string a,b; cin>>a>>b;
	ll AL = 0, BL = 0;
	ll A = locationof(a, 1ll, AL), B = locationof(b, 1ll, BL);

	//int MAXsteps = 50 * 2 + 2;
	ll Log = 52;
	if (AL < BL) swap(A, B), swap(AL, BL);
	ll diff = AL - BL;
	for (ll i = 0; i<diff; i++){
		AL--;
		A/=2LL;
	}
	
	int it = 0;
	ll curr = 0, climb = 0;
	ll Answer = 8e18;
	while(1){
		if (A == 0) break;
		ll temp = diff + abs(A - B) + climb * 2LL;
		Answer = min(Answer, temp);
		climb++;
		A = A / 2LL;
		B = B / 2LL;
	}
	cout<<Answer<<'\n';
}

int main(){
	Bolivia_is_nice;
	int t = 1; //cin>>t;
	while(t--)
	solve();
	
	return 0;
}
/*
  ~/.emacs
*/

Compilation message (stderr)

board.cpp: In function 'll locationof(std::string, ll, ll&)':
board.cpp:28:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |  for (int i=0; i<s.size(); i++){
      |                ~^~~~~~~~~
board.cpp: In function 'void solve()':
board.cpp:53:5: warning: unused variable 'Log' [-Wunused-variable]
   53 |  ll Log = 52;
      |     ^~~
board.cpp:61:6: warning: unused variable 'it' [-Wunused-variable]
   61 |  int it = 0;
      |      ^~
board.cpp:62:5: warning: unused variable 'curr' [-Wunused-variable]
   62 |  ll curr = 0, climb = 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