Submission #80474

#	Time	Username	Problem	Language	Result	Execution time	Memory
80474		Plurm	Board (CEOI13_board)	C++11	100 / 100	10 ms	1760 KiB

board

#include <bits/stdc++.h>
using namespace std;
char a[100005];
char b[100005];
class holder{
public:
	vector<int> masker;
	bool updt = false;
	holder& operator=(const holder& y){
		masker = y.masker;
		updt = y.updt;
		return *this;
	}
	int length(){
		return masker.size();
	}
	int gint(){
		int ret = 0;
		for(int i = max((int)masker.size()-19,0); i < (int)masker.size(); i++){
			ret *= 2;
			ret += (int)masker[i];
		}
		return ret;
	}
	void update(){
		updt = false;
		for(int i = masker.size()-1; i > 0 && i > (int)masker.size()-20; i--){
			if(masker[i] > 1){
				masker[i-1] += masker[i]/2;
				masker[i] &= 1;
			}
			if(masker[i] < 0){
				masker[i-1] += (masker[i]-1)/2;
				masker[i] &= 1;
			}
		}
	}
	void move(char x){
		switch(x){
		case '1':
			if(updt) update();
			masker.push_back(0);
			break;
		case '2':
			if(updt) update();
			masker.push_back(1);
			break;
		case 'U':
			if(updt) update();
			masker.pop_back();
			break;
		case 'L':
			masker.back()--;
			updt = true;
			break;
		case 'R':
			masker.back()++;
			updt = true;
			break;
		}
	}
};
int hsh[100005];
int mem[100005];
int main(){
	scanf("%s",a);
	scanf("%s",b);
	holder ma,mb;
	for(int i = 0; a[i]; i++){
		ma.move(a[i]);
	}
	ma.update();
	for(int i = 0; b[i]; i++){
		mb.move(b[i]);
	}
	mb.update();
	if(ma.length() < mb.length()){
		swap(ma,mb);
	}
	int lla = ma.length();
	int llb = mb.length();
	while(ma.length() > mb.length()){
		ma.move('U');
	}
	int d = lla + llb;
	int cur = 0;
	int rig = 0;
	for(int i = 0; i < mb.length(); i++){
		if(!rig && ma.masker[i] != mb.masker[i]){
			if(ma.masker[i] < mb.masker[i]) rig = 2;
			else rig = 1;
		}
		cur *= 2;
		if(rig == 1) cur += ma.masker[i] - mb.masker[i];
		else cur += mb.masker[i] - ma.masker[i];
		d = min(d,cur + lla - 2*i + llb - 2);
		if(cur > d) break;
	}
	printf("%d\n",d);
	return 0;
}

Compilation message (stderr)

board.cpp: In function 'int main()':
board.cpp:66:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%s",a);
  ~~~~~^~~~~~~~
board.cpp:67:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%s",b);
  ~~~~~^~~~~~~~

• 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: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10