Submission #320487

#	Time	Username	Problem	Language	Result	Execution time	Memory
320487		monus1042	Board (CEOI13_board)	C++17	20 / 100	7 ms	3564 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;

const int MAXS = 4100 * 3;
vi g[MAXS];
bool vis[MAXS];

int findlocation(string a, int A){
	for (int i=0; i<a.size(); i++){
		if (a[i] == '1'){
			A = A*2;
		}
		if (a[i] == '2'){
			A = A*2+1;
		}
		if (a[i] == 'L'){
			A = A-1;
		}
		if (a[i] == 'R'){
			A = A+1;
		}
		if (a[i] == 'U'){
			A = A/2;
		}
	}
	return A;
}

void solve(){
	string a,b; cin>>a>>b;
	for (int i=1; i<MAXS-5; i++){
		int l = i*2, r = i*2+1;
		if (l < MAXS) g[i].pb(l), g[l].pb(i);
		if (r < MAXS) g[i].pb(r), g[r].pb(i);

		if (i > 1){
			int cnt = 0;
			for (int j=0; j<=10; j++){
				if (i&(1<<j)) ++cnt;
			}
			if (cnt == 1){
				g[i].pb(i+1);
				g[i+1].pb(i);
			}else{
				bool sw = 0, ok = 1;
				for (int j=10; j>=0; j--){
					if (i&(1<<j) && sw == 0){
						sw = 1;
					}
					else if (!(i&(1<<j)) && sw){
						ok = 0;
					}
				}
				if (ok){
					g[i].pb(i-1);
					g[i-1].pb(i);
				}else{
					g[i].pb(i-1);
					g[i-1].pb(i);
					g[i].pb(i+1);
					g[i+1].pb(i);
				}
			}
		}
	}
	int A=findlocation(a, 1), B=findlocation(b, 1);

	queue<ii> bfs; // node, distance
	
	bfs.push(ii(A, 0));
	vis[A] = 1;
	while(!bfs.empty()){
		int u = bfs.front().first;
		int d = bfs.front().second;
		bfs.pop();
		if (u == B){
			cout<<d<<'\n';
			return;
		}
		for (int i=0; i<g[u].size(); i++){
			int v = g[u][i];
			if (!vis[v]){
				vis[v] = 1;
				bfs.push(ii(v, d+1));
			}
		}
	}
}

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

Compilation message (stderr)

board.cpp: In function 'int findlocation(std::string, int)':
board.cpp:32:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |  for (int i=0; i<a.size(); i++){
      |                ~^~~~~~~~~
board.cpp: In function 'void solve()':
board.cpp:103:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  103 |   for (int i=0; i<g[u].size(); i++){
      |                 ~^~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 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