oj.uz

Submission #124639

# Submission time Handle Problem Language Result Execution time Memory
124639 2019-07-03T16:01:28 Z vex Lamps (JOI19_lamps) C++14
100 / 100
 72 ms 28108 KB 
#include <bits/stdc++.h>
#define maxn   1000005
#define INF 1000020000
using namespace std;
 
int n;
string s1,s2;
int a[maxn],b[maxn];
int dp[maxn][2][2];
 
int minn(int x)
{
	return min(min(dp[x][0][0],dp[x][0][1]), min(dp[x][1][0],dp[x][1][1]));
}
 
int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.tie(nullptr);
	
	cin>>n;
	cin>>s1>>s2;
	for(int i=0;i<n;i++)
	{
		a[i]=s1[i]-'0';
		b[i]=s2[i]-'0';
	}
	
	if(a[0]==b[0])
	{
		dp[0][0][0]=0;
		dp[0][0][1]=INF;
		dp[0][1][0]=1;
		dp[0][1][1]=2;
	}
	else
	{
		dp[0][0][0]=INF;
		dp[0][0][1]=1;
		dp[0][1][0]=1;
		dp[0][1][1]=2;
	}
	
	for(int i=1;i<n;i++)
	{
		if(a[i]==b[i])
		{
			dp[i][0][0]=minn(i-1);
			dp[i][0][1]=INF;
			
			dp[i][1][0]=minn(i-1)+1;
			if(b[i-1]==b[i])dp[i][1][0]=min(dp[i][1][0],dp[i-1][1][0]);
			else dp[i][1][0]=min(dp[i][1][0],dp[i-1][1][1]);
			
			dp[i][1][1]=minn(i-1)+2;
			if(b[i]==b[i-1])dp[i][1][1]=min(dp[i][1][1],dp[i-1][1][1]);
			if(b[i-1]+b[i]==1)dp[i][1][1]=min(dp[i][1][1],dp[i-1][1][0]+1);
			dp[i][1][1]=min( min(dp[i-1][0][1],dp[i-1][1][1])+1, dp[i][1][1]);
		}
		else
		{
			dp[i][0][0]=INF;
			
			dp[i][0][1]=min( min(dp[i-1][0][1],dp[i-1][1][1]), min(dp[i-1][0][0],dp[i-1][1][0])+1 );
			
			dp[i][1][0]=minn(i-1)+1;
			if(b[i-1]==b[i])dp[i][1][0]=min(dp[i][1][0],dp[i-1][1][0]);
			else dp[i][1][0]=min(dp[i][1][0],dp[i-1][1][1]);
			
			dp[i][1][1]=minn(i-1)+2;
			if(b[i]==b[i-1])dp[i][1][1]=min(dp[i][1][1],dp[i-1][1][1]);
			if(b[i-1]+b[i]==1)dp[i][1][1]=min(dp[i][1][1],dp[i-1][1][0]+1);
			dp[i][1][1]=min( min(dp[i-1][0][1],dp[i-1][1][1])+1, dp[i][1][1]);
		}
	}
	
	/*for(int i=0;i<n;i++)
	{
		cout<<i<<": "<<dp[i][0][0]<<" "<<dp[i][0][1]<<" "<<dp[i][1][0]<<" "<<dp[i][1][1]<<endl;
	}*/
	
	cout<<minn(n-1)<<endl;
	return 0;
}

Subtask #1
6.0 / 6.0

# 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 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 504 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 2 ms 376 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 376 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 2 ms 376 KB Output is correct
27 Correct 2 ms 376 KB Output is correct
28 Correct 2 ms 376 KB Output is correct
29 Correct 2 ms 376 KB Output is correct
30 Correct 2 ms 376 KB Output is correct
31 Correct 2 ms 380 KB Output is correct
32 Correct 2 ms 376 KB Output is correct
33 Correct 2 ms 380 KB Output is correct
34 Correct 2 ms 376 KB Output is correct

Subtask #2
41.0 / 41.0

# 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 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 504 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 2 ms 376 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 376 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 2 ms 376 KB Output is correct
27 Correct 2 ms 376 KB Output is correct
28 Correct 2 ms 376 KB Output is correct
29 Correct 2 ms 376 KB Output is correct
30 Correct 2 ms 376 KB Output is correct
31 Correct 2 ms 380 KB Output is correct
32 Correct 2 ms 376 KB Output is correct
33 Correct 2 ms 380 KB Output is correct
34 Correct 2 ms 376 KB Output is correct
35 Correct 2 ms 376 KB Output is correct
36 Correct 2 ms 376 KB Output is correct
37 Correct 2 ms 376 KB Output is correct
38 Correct 2 ms 376 KB Output is correct
39 Correct 2 ms 504 KB Output is correct
40 Correct 2 ms 376 KB Output is correct
41 Correct 2 ms 504 KB Output is correct
42 Correct 2 ms 376 KB Output is correct
43 Correct 2 ms 376 KB Output is correct
44 Correct 2 ms 376 KB Output is correct
45 Correct 2 ms 376 KB Output is correct
46 Correct 2 ms 376 KB Output is correct
47 Correct 2 ms 376 KB Output is correct
48 Correct 2 ms 376 KB Output is correct
49 Correct 2 ms 376 KB Output is correct
50 Correct 2 ms 376 KB Output is correct
51 Correct 2 ms 376 KB Output is correct
52 Correct 2 ms 376 KB Output is correct
53 Correct 2 ms 376 KB Output is correct
54 Correct 2 ms 376 KB Output is correct
55 Correct 2 ms 376 KB Output is correct
56 Correct 2 ms 376 KB Output is correct
57 Correct 2 ms 376 KB Output is correct
58 Correct 2 ms 376 KB Output is correct

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 380 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 39 ms 27848 KB Output is correct
8 Correct 35 ms 27848 KB Output is correct
9 Correct 35 ms 27848 KB Output is correct
10 Correct 40 ms 27972 KB Output is correct
11 Correct 39 ms 27820 KB Output is correct
12 Correct 72 ms 27852 KB Output is correct
13 Correct 36 ms 27980 KB Output is correct
14 Correct 35 ms 28108 KB Output is correct

Subtask #4
49.0 / 49.0

# 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 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 504 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 2 ms 376 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 376 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 2 ms 376 KB Output is correct
27 Correct 2 ms 376 KB Output is correct
28 Correct 2 ms 376 KB Output is correct
29 Correct 2 ms 376 KB Output is correct
30 Correct 2 ms 376 KB Output is correct
31 Correct 2 ms 380 KB Output is correct
32 Correct 2 ms 376 KB Output is correct
33 Correct 2 ms 380 KB Output is correct
34 Correct 2 ms 376 KB Output is correct
35 Correct 2 ms 376 KB Output is correct
36 Correct 2 ms 376 KB Output is correct
37 Correct 2 ms 376 KB Output is correct
38 Correct 2 ms 376 KB Output is correct
39 Correct 2 ms 504 KB Output is correct
40 Correct 2 ms 376 KB Output is correct
41 Correct 2 ms 504 KB Output is correct
42 Correct 2 ms 376 KB Output is correct
43 Correct 2 ms 376 KB Output is correct
44 Correct 2 ms 376 KB Output is correct
45 Correct 2 ms 376 KB Output is correct
46 Correct 2 ms 376 KB Output is correct
47 Correct 2 ms 376 KB Output is correct
48 Correct 2 ms 376 KB Output is correct
49 Correct 2 ms 376 KB Output is correct
50 Correct 2 ms 376 KB Output is correct
51 Correct 2 ms 376 KB Output is correct
52 Correct 2 ms 376 KB Output is correct
53 Correct 2 ms 376 KB Output is correct
54 Correct 2 ms 376 KB Output is correct
55 Correct 2 ms 376 KB Output is correct
56 Correct 2 ms 376 KB Output is correct
57 Correct 2 ms 376 KB Output is correct
58 Correct 2 ms 376 KB Output is correct
59 Correct 2 ms 376 KB Output is correct
60 Correct 2 ms 376 KB Output is correct
61 Correct 2 ms 380 KB Output is correct
62 Correct 2 ms 376 KB Output is correct
63 Correct 2 ms 376 KB Output is correct
64 Correct 2 ms 376 KB Output is correct
65 Correct 39 ms 27848 KB Output is correct
66 Correct 35 ms 27848 KB Output is correct
67 Correct 35 ms 27848 KB Output is correct
68 Correct 40 ms 27972 KB Output is correct
69 Correct 39 ms 27820 KB Output is correct
70 Correct 72 ms 27852 KB Output is correct
71 Correct 36 ms 27980 KB Output is correct
72 Correct 35 ms 28108 KB Output is correct
73 Correct 34 ms 27848 KB Output is correct
74 Correct 35 ms 27852 KB Output is correct
75 Correct 34 ms 27844 KB Output is correct
76 Correct 40 ms 27844 KB Output is correct
77 Correct 35 ms 27852 KB Output is correct
78 Correct 34 ms 27848 KB Output is correct
79 Correct 34 ms 27980 KB Output is correct
80 Correct 34 ms 27848 KB Output is correct
81 Correct 37 ms 27956 KB Output is correct
82 Correct 39 ms 27848 KB Output is correct
83 Correct 41 ms 27972 KB Output is correct
84 Correct 38 ms 27952 KB Output is correct
85 Correct 38 ms 27852 KB Output is correct
86 Correct 38 ms 27920 KB Output is correct
87 Correct 38 ms 27856 KB Output is correct
88 Correct 38 ms 27848 KB Output is correct
89 Correct 38 ms 27852 KB Output is correct
90 Correct 38 ms 27940 KB Output is correct
91 Correct 40 ms 27848 KB Output is correct
92 Correct 41 ms 27908 KB Output is correct
93 Correct 42 ms 27848 KB Output is correct
94 Correct 42 ms 27848 KB Output is correct
95 Correct 41 ms 27852 KB Output is correct
96 Correct 41 ms 27852 KB Output is correct
97 Correct 44 ms 27848 KB Output is correct
98 Correct 42 ms 27820 KB Output is correct
99 Correct 41 ms 27852 KB Output is correct
100 Correct 41 ms 27844 KB Output is correct
101 Correct 41 ms 27852 KB Output is correct
102 Correct 42 ms 27840 KB Output is correct