Submission #63735

#	Time	Username	Problem	Language	Result	Execution time	Memory
63735		bazsi700	Board (CEOI13_board)	C++14	0 / 100	1077 ms	1316 KiB

board

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

#define MOD 1000000007
#define ll long long int
#define vi vector<int>
#define vii vector< vector<int> >
#define PI 3.1415926535897932384626433832795
#define INF 9223372036854775807LL

//15:20

bool node1[100005];
bool node2[100005];
bool dist[100005];
bool temp[100005];
bool todeduc[100005];
int lev1,lev2;
int levdist;

void calcdist() {
	levdist = 0;
	bool rem = false;
	for(int i = lev1; i >= 0; i--) {
		bool nod1 = node1[i];
		bool nod2 = node2[i];
		if(rem) {
			rem = false;
			if(nod2 && !nod1) {
				temp[i] = false;
			} else if(!nod2 && !nod1) {
				temp[i] = true;
				rem = true;
			} else if(nod1 && nod2) {
				temp[i] = true;
				rem = true;
			} else if(nod1 && !nod2) {
				temp[i] = false;
				rem = true;
			}
		} else {
			if(nod2 && !nod1) {
				temp[i] = true;
			} else if(nod1 == nod2) {
				temp[i] = false;
			} else {
				temp[i] = true;
				rem = true;
			}
		}
	}
	int ind = -1;
	for(int i = 0; i <= lev1; i++) {
		if(temp[i] && ind == -1) {
			ind = 0;
		}
		if(ind != -1) {
			dist[ind++] = temp[i];
		}
	}
	levdist = ind-1;
}

string transf(string s) {
	int n = s.length();
	string ans = "";
	int lev = 0;
	bool onleft = true;
	int moved = 0;
	for(int i = 0; i < n; i++) {
		if(s.at(i) == 'R') {
			moved++;
		} else if(s.at(i) == 'L') {
			moved--;
		} else {
			if(s.at(i) == 'U') {
				lev--;
				if(onleft && moved == 1) {
					ans+= s.at(i);
					continue;
				}
				if(!onleft && moved == -1) {
					ans+= s.at(i);
					continue;
				}
				if(moved == 0) {
					ans+= s.at(i);
					continue;
				}
				if(moved < 0) {
					for(int i = 0; i < -moved; i++) {
						ans+= 'L';
					}
				} else {
					for(int i = 0; i < moved; i++) {
						ans+= 'R';
					}
				}
			} else {
				if(s.at(i) == '1') {
					onleft = true;
				} else {
					onleft = false;
				}
				lev++;
				if(moved == 0) {
					ans+= s.at(i);
					continue;
				}
				if(moved < 0) {
					for(int i = 0; i < -moved; i++) {
						ans+= 'L';
					}
				} else {
					for(int i = 0; i < moved; i++) {
						ans+= 'R';
					}
				}
			}
			ans+= s.at(i);
			moved = 0;
		}
	}
	if(moved < 0) {
		for(int i = 0; i < -moved; i++) {
			ans+= 'L';
		}
	} else {
		for(int i = 0; i < moved; i++) {
			ans+= 'R';
		}
	}
	return ans;
}

int main() {
	ios::sync_with_stdio(false);
	cin.tie(NULL);
	string a;
	string b;
	cin >> a >> b;
	a = transf(a);
	b = transf(b);
	//cout << a << " " << b << endl;
	node1[0] = node2[0] = 1;
	lev1 = lev2 = 0;
	for(int i = 0; i < a.length(); i++) {
		if(a.at(i) == '1') {
			lev1++;
		} else if(a.at(i) == '2') {
			lev1++;
			node1[lev1] = true;
		} else if(a.at(i) == 'L') {
			for(int j = lev1; j >= 0; j--) {
				if(node1[j]) {
					node1[j] = false;
					break;
				} else {
					node1[j] = true;
				}
			}
		} else if(a.at(i) == 'R') {
			for(int j = lev1; j >= 0; j--) {
				if(!node1[j]) {
					node1[j] = true;
					break;
				} else {
					node1[j] = false;
				}
			}
		} else {
			node1[lev1] = false;
			lev1--;
		}
	}
	for(int i = 0; i < b.length(); i++) {
		//cout <<"a" << node2 << " ";
		if(b.at(i) == '1') {
			lev2++;
		} else if(b.at(i) == '2') {
			lev2++;
			node2[lev2] = true;
		} else if(b.at(i) == 'L') {
			for(int j = lev2; j >= 0; j--) {
				if(node2[j]) {
					node2[j] = false;
					break;
				} else {
					node2[j] = true;
				}
			}
		} else if(b.at(i) == 'R') {
			for(int j = lev2; j >= 0; j--) {
				if(!node2[j]) {
					node2[j] = true;
					break;
				} else {
					node2[j] = false;
				}
			}
		} else {
			node2[lev2] = false;
			lev2--;
		}
	}
	if(lev1 > lev2) {
		swap(lev1,lev2);
		swap(node1,node2);
	} else if(lev1 == lev2) {
		bool bad = false;
		bool eq = true;
		for(int i = 0; i <= lev1; i++) {
			if(node1[i] != node2[i]) {
				eq = false;
				if(node1[i]) {
					bad = true;
				}
				break;
			}
		}
		if(eq) {
			cout << 0;
			return 0;
		}
		if(bad) {
			swap(node1,node2);
		}
	}
	int wasdif = lev2-lev1;
	for(int i = 0; i < lev2-lev1; i++) {
		lev2--;
	}
	ll ans = INF;
	ll nod1 = 0;
	ll nod2 = 0;
	int waslev = lev1;
	calcdist();
	for(int goesupmore = 0; goesupmore < waslev; goesupmore++) {
		if(lev1 <= 25) {
			if(nod1 == 0) {
				for(int i = 0; i <= lev1; i++) {
					nod1*=2;
					if(node1[i]) {
						nod1++;
					}
					nod2*=2;
					if(node2[i]) {
						nod2++;
					}
				}
			}
			ans = min(ans,wasdif+goesupmore*2+abs(nod1-nod2));
			nod1/=2;
			nod2/=2;
		} else {
			if(levdist <= 30) {
				calcdist();
				ll dis = 0;
				for(int i = 0; i <= levdist; i++) {
					dis*=2;
					if(dist[i]) {
						dis++;
					}
				}
				ans = min(ans,wasdif+goesupmore*2+dis);
				if(dis == 0) {
					break;
				}
				lev1--;
				lev2--;
			} else {
				lev1--;
				lev2--;
				levdist--;
			}
		}
	}
	ans = min(ans,wasdif+waslev*2+abs(nod1-nod2));
	//cout << node2 << endl;
	cout << ans;
	return 0;
}

Compilation message (stderr)

board.cpp: In function 'int main()':
board.cpp:147:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < a.length(); i++) {
                 ~~^~~~~~~~~~~~
board.cpp:176:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < b.length(); i++) {
                 ~~^~~~~~~~~~~~

• Subtask 1: 0 / 10
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