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Submission #129170

# Submission time Handle Problem Language Result Execution time Memory
129170 2019-07-11T18:46:45 Z mahmoudbadawy Lamps (JOI19_lamps) C++17
10 / 100
 384 ms 4912 KB 
#include <bits/stdc++.h>

using namespace std;

string a,b;
int n;
int dis[(1<<18)];

int conv(string s)
{
	int res=0;
	for(int i=0;i<s.size();i++)
		res=res*2+(s[i]-'0');
	return res;
}

int main()
{
	cin >> n >> a >> b;
	if(a==string(n,'0'))
	{
		int ans[2]={b[0]=='0',b[0]=='1'};
		for(int i=1;i<b.size();i++)
		{
			if(b[i]!=b[i-1])
				ans[b[i]-'0']++;
		}
		cout << min(ans[1],1+ans[0]) << endl;
		return 0;
	}
	queue<int> q;
	q.push(conv(a));
	int bb=conv(b);
	memset(dis,-1,sizeof dis);
	dis[conv(a)]=0;
	while(q.size())
	{
		int s=q.front(); q.pop();
		if(s==bb) break;
		for(int i=0;i<n;i++)
		{
			int sd=s;
			for(int j=i;j<n;j++)
			{
				sd&=(~(1<<j));
				if(dis[sd]!=-1) continue;
				dis[sd]=dis[s]+1;
				q.push(sd);
			}
		}
		for(int i=0;i<n;i++)
		{
			int sd=s;
			for(int j=i;j<n;j++)
			{
				sd|=(1<<j);
				if(dis[sd]!=-1) continue;
				dis[sd]=dis[s]+1;
				q.push(sd);
			}
		}
		for(int i=0;i<n;i++)
		{
			int sd=s;
			for(int j=i;j<n;j++)
			{
				sd^=(1<<j);
				if(dis[sd]!=-1) continue;
				dis[sd]=dis[s]+1;
				q.push(sd);
			}
		}
	}
	cout << dis[bb] << endl;
	
}

Compilation message

lamp.cpp: In function 'int conv(std::__cxx11::string)':
lamp.cpp:12:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<s.size();i++)
              ~^~~~~~~~~
lamp.cpp: In function 'int main()':
lamp.cpp:23:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=1;i<b.size();i++)
               ~^~~~~~~~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1400 KB Output is correct
2 Correct 3 ms 1400 KB Output is correct
3 Correct 3 ms 1400 KB Output is correct
4 Correct 3 ms 1400 KB Output is correct
5 Correct 3 ms 1272 KB Output is correct
6 Correct 3 ms 1400 KB Output is correct
7 Correct 3 ms 1400 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 384 ms 1872 KB Output is correct
10 Correct 166 ms 1528 KB Output is correct
11 Correct 2 ms 252 KB Output is correct
12 Correct 33 ms 1792 KB Output is correct
13 Correct 88 ms 1656 KB Output is correct
14 Correct 68 ms 1912 KB Output is correct
15 Correct 104 ms 1656 KB Output is correct
16 Correct 262 ms 2168 KB Output is correct
17 Correct 96 ms 1656 KB Output is correct
18 Correct 38 ms 1856 KB Output is correct
19 Correct 24 ms 1528 KB Output is correct
20 Correct 233 ms 1956 KB Output is correct
21 Correct 9 ms 1500 KB Output is correct
22 Correct 32 ms 1788 KB Output is correct
23 Correct 61 ms 1528 KB Output is correct
24 Correct 4 ms 1400 KB Output is correct
25 Correct 5 ms 1400 KB Output is correct
26 Correct 211 ms 1912 KB Output is correct
27 Correct 77 ms 1656 KB Output is correct
28 Correct 29 ms 1528 KB Output is correct
29 Correct 324 ms 1856 KB Output is correct
30 Correct 117 ms 1656 KB Output is correct
31 Correct 4 ms 1404 KB Output is correct
32 Correct 42 ms 1784 KB Output is correct
33 Correct 104 ms 1784 KB Output is correct
34 Correct 26 ms 1528 KB Output is correct

Subtask #2
0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1400 KB Output is correct
2 Correct 3 ms 1400 KB Output is correct
3 Correct 3 ms 1400 KB Output is correct
4 Correct 3 ms 1400 KB Output is correct
5 Correct 3 ms 1272 KB Output is correct
6 Correct 3 ms 1400 KB Output is correct
7 Correct 3 ms 1400 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 384 ms 1872 KB Output is correct
10 Correct 166 ms 1528 KB Output is correct
11 Correct 2 ms 252 KB Output is correct
12 Correct 33 ms 1792 KB Output is correct
13 Correct 88 ms 1656 KB Output is correct
14 Correct 68 ms 1912 KB Output is correct
15 Correct 104 ms 1656 KB Output is correct
16 Correct 262 ms 2168 KB Output is correct
17 Correct 96 ms 1656 KB Output is correct
18 Correct 38 ms 1856 KB Output is correct
19 Correct 24 ms 1528 KB Output is correct
20 Correct 233 ms 1956 KB Output is correct
21 Correct 9 ms 1500 KB Output is correct
22 Correct 32 ms 1788 KB Output is correct
23 Correct 61 ms 1528 KB Output is correct
24 Correct 4 ms 1400 KB Output is correct
25 Correct 5 ms 1400 KB Output is correct
26 Correct 211 ms 1912 KB Output is correct
27 Correct 77 ms 1656 KB Output is correct
28 Correct 29 ms 1528 KB Output is correct
29 Correct 324 ms 1856 KB Output is correct
30 Correct 117 ms 1656 KB Output is correct
31 Correct 4 ms 1404 KB Output is correct
32 Correct 42 ms 1784 KB Output is correct
33 Correct 104 ms 1784 KB Output is correct
34 Correct 26 ms 1528 KB Output is correct
35 Runtime error 5 ms 2552 KB Execution killed with signal 11 (could be triggered by violating memory limits)
36 Halted 0 ms 0 KB -

Subtask #3
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 120 ms 4180 KB Output is correct
8 Correct 125 ms 4312 KB Output is correct
9 Correct 122 ms 4752 KB Output is correct
10 Correct 142 ms 4912 KB Output is correct
11 Correct 122 ms 4840 KB Output is correct
12 Correct 128 ms 4748 KB Output is correct
13 Correct 119 ms 4840 KB Output is correct
14 Correct 119 ms 4816 KB Output is correct

Subtask #4
0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1400 KB Output is correct
2 Correct 3 ms 1400 KB Output is correct
3 Correct 3 ms 1400 KB Output is correct
4 Correct 3 ms 1400 KB Output is correct
5 Correct 3 ms 1272 KB Output is correct
6 Correct 3 ms 1400 KB Output is correct
7 Correct 3 ms 1400 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 384 ms 1872 KB Output is correct
10 Correct 166 ms 1528 KB Output is correct
11 Correct 2 ms 252 KB Output is correct
12 Correct 33 ms 1792 KB Output is correct
13 Correct 88 ms 1656 KB Output is correct
14 Correct 68 ms 1912 KB Output is correct
15 Correct 104 ms 1656 KB Output is correct
16 Correct 262 ms 2168 KB Output is correct
17 Correct 96 ms 1656 KB Output is correct
18 Correct 38 ms 1856 KB Output is correct
19 Correct 24 ms 1528 KB Output is correct
20 Correct 233 ms 1956 KB Output is correct
21 Correct 9 ms 1500 KB Output is correct
22 Correct 32 ms 1788 KB Output is correct
23 Correct 61 ms 1528 KB Output is correct
24 Correct 4 ms 1400 KB Output is correct
25 Correct 5 ms 1400 KB Output is correct
26 Correct 211 ms 1912 KB Output is correct
27 Correct 77 ms 1656 KB Output is correct
28 Correct 29 ms 1528 KB Output is correct
29 Correct 324 ms 1856 KB Output is correct
30 Correct 117 ms 1656 KB Output is correct
31 Correct 4 ms 1404 KB Output is correct
32 Correct 42 ms 1784 KB Output is correct
33 Correct 104 ms 1784 KB Output is correct
34 Correct 26 ms 1528 KB Output is correct
35 Runtime error 5 ms 2552 KB Execution killed with signal 11 (could be triggered by violating memory limits)
36 Halted 0 ms 0 KB -