Submission #129110

#	Time	Username	Problem	Language	Result	Execution time	Memory
129110		mahmoudbadawy	Lamps (JOI19_lamps)	C++17	0 / 100	1073 ms	19676 KiB

lamp

#include <bits/stdc++.h>

using namespace std;

string a,b;
int n;
map<string,int> dis;
map<string,string > st;

int main()
{
	cin >> n >> a >> b;
	queue<string> q;
	q.push(a);
	dis[a]=0;
	while(q.size())
	{
		string s=q.front(); q.pop();
		if(s==b) break;
		for(int i=0;i<n;i++)
		{
			string sd=s;
			for(int j=i;j<n;j++)
			{
				sd[j]='0';
				if(dis.count(sd)) continue;
				dis[sd]=dis[s]+1;
				st[sd]=s;
				q.push(sd);
			}
		}
		for(int i=0;i<n;i++)
		{
			string sd=s;
			for(int j=i;j<n;j++)
			{
				sd[j]='1';
				if(dis.count(sd)) continue;
				dis[sd]=dis[s]+1;
				st[sd]=s;
				q.push(sd);
			}
		}
		for(int i=0;i<n;i++)
		{
			string sd=s;
			for(int j=i;j<n;j++)
			{
				sd[j]=(1-(s[j]-'0'))+'0';
				if(dis.count(sd)) continue;
				dis[sd]=dis[s]+1;
				st[sd]=s;
				q.push(sd);
			}
		}
	}
	cout << dis[b] << endl;
}

• Subtask 1: 0 / 6
• Subtask 2: 0 / 41
• Subtask 3: 0 / 4
• Subtask 4: 0 / 49