///In the name of GOD
//#pragma GCC optimize("O2")
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const ll MXN = 1e6 + 5;
const ll INF = 1e15;
ll n;
ll dp[MXN][3][2];
string s, t;
int main(){
ios::sync_with_stdio(0);cin.tie(0); cout.tie(0);
cin >> n >> s >> t;
s = "$" + s, t = "$" + t;
dp[0][0][0] = 0;
dp[0][0][1] = 1;
dp[0][1][0] = 1;
dp[0][1][1] = 2;
dp[0][2][0] = 1;
dp[0][2][1] = 2;
for(int i = 1; i <= n; i ++){
dp[i][0][0] = dp[i][0][1] = dp[i][1][0] = INF;
dp[i][1][1] = dp[i][2][0] = dp[i][2][1] = INF;
bool f = (s[i] == t[i]);
if(s[i] == t[i]){
dp[i][0][0] = min({dp[i - 1][0][0], dp[i - 1][0][1], dp[i - 1][1][0],
dp[i - 1][1][1], dp[i - 1][2][0], dp[i - 1][2][1]});
}
else{
dp[i][0][1] = min({dp[i - 1][0][0] + 1, dp[i - 1][0][1] + 0, dp[i - 1][1][0] + 1,
dp[i - 1][1][1] + 0, dp[i - 1][2][0] + 1, dp[i - 1][2][1] + 0});
}
f = (t[i] == '1');
if(f){
dp[i][2][0] = min({dp[i - 1][0][0] + 1, dp[i - 1][0][1] + 1, dp[i - 1][1][0] + 1,
dp[i - 1][1][1] + 1, dp[i - 1][2][0] + 0, dp[i - 1][2][1] + 0});
dp[i][1][1] = min({dp[i - 1][0][0] + 2, dp[i - 1][0][1] + 1, dp[i - 1][1][0] + 1,
dp[i - 1][1][1] + 0, dp[i - 1][2][0] + 2, dp[i - 1][2][1] + 1});
}
else{
dp[i][1][0] = min({dp[i - 1][0][0] + 1, dp[i - 1][0][1] + 1, dp[i - 1][1][0] + 0,
dp[i - 1][1][1] + 0, dp[i - 1][2][0] + 1, dp[i - 1][2][1] + 1});
dp[i][2][1] = min({dp[i - 1][0][0] + 2, dp[i - 1][0][1] + 1, dp[i - 1][1][0] + 2,
dp[i - 1][1][1] + 1, dp[i - 1][2][0] + 1, dp[i - 1][2][1] + 0});
}
}
ll ans = min({dp[n][0][0], dp[n][0][1], dp[n][1][0],
dp[n][1][1], dp[n][2][0], dp[n][2][1]});
cout << ans << '\n';
return 0;
}
/*!
HE'S AN INSTIGATOR,
ENEMY ELIMINATOR,
AND WHEN HE KNOCKS YOU BETTER
YOU BETTER LET HIM IN.
*/
//! N.N
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
364 KB |
Output is correct |
2 |
Correct |
1 ms |
364 KB |
Output is correct |
3 |
Correct |
1 ms |
364 KB |
Output is correct |
4 |
Correct |
0 ms |
364 KB |
Output is correct |
5 |
Correct |
1 ms |
364 KB |
Output is correct |
6 |
Correct |
1 ms |
364 KB |
Output is correct |
7 |
Correct |
1 ms |
364 KB |
Output is correct |
8 |
Correct |
1 ms |
364 KB |
Output is correct |
9 |
Correct |
1 ms |
364 KB |
Output is correct |
10 |
Correct |
1 ms |
364 KB |
Output is correct |
11 |
Correct |
1 ms |
364 KB |
Output is correct |
12 |
Correct |
0 ms |
364 KB |
Output is correct |
13 |
Correct |
1 ms |
364 KB |
Output is correct |
14 |
Correct |
1 ms |
364 KB |
Output is correct |
15 |
Correct |
1 ms |
364 KB |
Output is correct |
16 |
Correct |
1 ms |
364 KB |
Output is correct |
17 |
Correct |
1 ms |
364 KB |
Output is correct |
18 |
Correct |
1 ms |
364 KB |
Output is correct |
19 |
Correct |
1 ms |
364 KB |
Output is correct |
20 |
Correct |
1 ms |
364 KB |
Output is correct |
21 |
Correct |
1 ms |
364 KB |
Output is correct |
22 |
Correct |
1 ms |
364 KB |
Output is correct |
23 |
Correct |
1 ms |
364 KB |
Output is correct |
24 |
Correct |
1 ms |
364 KB |
Output is correct |
25 |
Correct |
1 ms |
364 KB |
Output is correct |
26 |
Correct |
1 ms |
364 KB |
Output is correct |
27 |
Correct |
1 ms |
364 KB |
Output is correct |
28 |
Correct |
1 ms |
364 KB |
Output is correct |
29 |
Correct |
1 ms |
364 KB |
Output is correct |
30 |
Correct |
1 ms |
364 KB |
Output is correct |
31 |
Correct |
1 ms |
364 KB |
Output is correct |
32 |
Correct |
1 ms |
364 KB |
Output is correct |
33 |
Correct |
1 ms |
364 KB |
Output is correct |
34 |
Correct |
1 ms |
364 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
364 KB |
Output is correct |
2 |
Correct |
1 ms |
364 KB |
Output is correct |
3 |
Correct |
1 ms |
364 KB |
Output is correct |
4 |
Correct |
0 ms |
364 KB |
Output is correct |
5 |
Correct |
1 ms |
364 KB |
Output is correct |
6 |
Correct |
1 ms |
364 KB |
Output is correct |
7 |
Correct |
1 ms |
364 KB |
Output is correct |
8 |
Correct |
1 ms |
364 KB |
Output is correct |
9 |
Correct |
1 ms |
364 KB |
Output is correct |
10 |
Correct |
1 ms |
364 KB |
Output is correct |
11 |
Correct |
1 ms |
364 KB |
Output is correct |
12 |
Correct |
0 ms |
364 KB |
Output is correct |
13 |
Correct |
1 ms |
364 KB |
Output is correct |
14 |
Correct |
1 ms |
364 KB |
Output is correct |
15 |
Correct |
1 ms |
364 KB |
Output is correct |
16 |
Correct |
1 ms |
364 KB |
Output is correct |
17 |
Correct |
1 ms |
364 KB |
Output is correct |
18 |
Correct |
1 ms |
364 KB |
Output is correct |
19 |
Correct |
1 ms |
364 KB |
Output is correct |
20 |
Correct |
1 ms |
364 KB |
Output is correct |
21 |
Correct |
1 ms |
364 KB |
Output is correct |
22 |
Correct |
1 ms |
364 KB |
Output is correct |
23 |
Correct |
1 ms |
364 KB |
Output is correct |
24 |
Correct |
1 ms |
364 KB |
Output is correct |
25 |
Correct |
1 ms |
364 KB |
Output is correct |
26 |
Correct |
1 ms |
364 KB |
Output is correct |
27 |
Correct |
1 ms |
364 KB |
Output is correct |
28 |
Correct |
1 ms |
364 KB |
Output is correct |
29 |
Correct |
1 ms |
364 KB |
Output is correct |
30 |
Correct |
1 ms |
364 KB |
Output is correct |
31 |
Correct |
1 ms |
364 KB |
Output is correct |
32 |
Correct |
1 ms |
364 KB |
Output is correct |
33 |
Correct |
1 ms |
364 KB |
Output is correct |
34 |
Correct |
1 ms |
364 KB |
Output is correct |
35 |
Correct |
1 ms |
492 KB |
Output is correct |
36 |
Correct |
1 ms |
492 KB |
Output is correct |
37 |
Correct |
1 ms |
492 KB |
Output is correct |
38 |
Correct |
1 ms |
492 KB |
Output is correct |
39 |
Correct |
1 ms |
492 KB |
Output is correct |
40 |
Correct |
1 ms |
492 KB |
Output is correct |
41 |
Correct |
1 ms |
492 KB |
Output is correct |
42 |
Correct |
1 ms |
492 KB |
Output is correct |
43 |
Correct |
1 ms |
492 KB |
Output is correct |
44 |
Correct |
1 ms |
492 KB |
Output is correct |
45 |
Correct |
1 ms |
492 KB |
Output is correct |
46 |
Correct |
1 ms |
492 KB |
Output is correct |
47 |
Correct |
1 ms |
492 KB |
Output is correct |
48 |
Correct |
1 ms |
492 KB |
Output is correct |
49 |
Correct |
1 ms |
492 KB |
Output is correct |
50 |
Correct |
1 ms |
492 KB |
Output is correct |
51 |
Correct |
1 ms |
492 KB |
Output is correct |
52 |
Correct |
1 ms |
492 KB |
Output is correct |
53 |
Correct |
1 ms |
492 KB |
Output is correct |
54 |
Correct |
1 ms |
492 KB |
Output is correct |
55 |
Correct |
1 ms |
492 KB |
Output is correct |
56 |
Correct |
1 ms |
492 KB |
Output is correct |
57 |
Correct |
1 ms |
492 KB |
Output is correct |
58 |
Correct |
1 ms |
492 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
364 KB |
Output is correct |
2 |
Correct |
1 ms |
364 KB |
Output is correct |
3 |
Correct |
1 ms |
364 KB |
Output is correct |
4 |
Correct |
1 ms |
364 KB |
Output is correct |
5 |
Correct |
1 ms |
364 KB |
Output is correct |
6 |
Correct |
1 ms |
364 KB |
Output is correct |
7 |
Correct |
54 ms |
50060 KB |
Output is correct |
8 |
Correct |
60 ms |
50196 KB |
Output is correct |
9 |
Correct |
58 ms |
50188 KB |
Output is correct |
10 |
Correct |
54 ms |
50060 KB |
Output is correct |
11 |
Correct |
52 ms |
50060 KB |
Output is correct |
12 |
Correct |
49 ms |
50060 KB |
Output is correct |
13 |
Correct |
52 ms |
50060 KB |
Output is correct |
14 |
Correct |
57 ms |
50060 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
364 KB |
Output is correct |
2 |
Correct |
1 ms |
364 KB |
Output is correct |
3 |
Correct |
1 ms |
364 KB |
Output is correct |
4 |
Correct |
0 ms |
364 KB |
Output is correct |
5 |
Correct |
1 ms |
364 KB |
Output is correct |
6 |
Correct |
1 ms |
364 KB |
Output is correct |
7 |
Correct |
1 ms |
364 KB |
Output is correct |
8 |
Correct |
1 ms |
364 KB |
Output is correct |
9 |
Correct |
1 ms |
364 KB |
Output is correct |
10 |
Correct |
1 ms |
364 KB |
Output is correct |
11 |
Correct |
1 ms |
364 KB |
Output is correct |
12 |
Correct |
0 ms |
364 KB |
Output is correct |
13 |
Correct |
1 ms |
364 KB |
Output is correct |
14 |
Correct |
1 ms |
364 KB |
Output is correct |
15 |
Correct |
1 ms |
364 KB |
Output is correct |
16 |
Correct |
1 ms |
364 KB |
Output is correct |
17 |
Correct |
1 ms |
364 KB |
Output is correct |
18 |
Correct |
1 ms |
364 KB |
Output is correct |
19 |
Correct |
1 ms |
364 KB |
Output is correct |
20 |
Correct |
1 ms |
364 KB |
Output is correct |
21 |
Correct |
1 ms |
364 KB |
Output is correct |
22 |
Correct |
1 ms |
364 KB |
Output is correct |
23 |
Correct |
1 ms |
364 KB |
Output is correct |
24 |
Correct |
1 ms |
364 KB |
Output is correct |
25 |
Correct |
1 ms |
364 KB |
Output is correct |
26 |
Correct |
1 ms |
364 KB |
Output is correct |
27 |
Correct |
1 ms |
364 KB |
Output is correct |
28 |
Correct |
1 ms |
364 KB |
Output is correct |
29 |
Correct |
1 ms |
364 KB |
Output is correct |
30 |
Correct |
1 ms |
364 KB |
Output is correct |
31 |
Correct |
1 ms |
364 KB |
Output is correct |
32 |
Correct |
1 ms |
364 KB |
Output is correct |
33 |
Correct |
1 ms |
364 KB |
Output is correct |
34 |
Correct |
1 ms |
364 KB |
Output is correct |
35 |
Correct |
1 ms |
492 KB |
Output is correct |
36 |
Correct |
1 ms |
492 KB |
Output is correct |
37 |
Correct |
1 ms |
492 KB |
Output is correct |
38 |
Correct |
1 ms |
492 KB |
Output is correct |
39 |
Correct |
1 ms |
492 KB |
Output is correct |
40 |
Correct |
1 ms |
492 KB |
Output is correct |
41 |
Correct |
1 ms |
492 KB |
Output is correct |
42 |
Correct |
1 ms |
492 KB |
Output is correct |
43 |
Correct |
1 ms |
492 KB |
Output is correct |
44 |
Correct |
1 ms |
492 KB |
Output is correct |
45 |
Correct |
1 ms |
492 KB |
Output is correct |
46 |
Correct |
1 ms |
492 KB |
Output is correct |
47 |
Correct |
1 ms |
492 KB |
Output is correct |
48 |
Correct |
1 ms |
492 KB |
Output is correct |
49 |
Correct |
1 ms |
492 KB |
Output is correct |
50 |
Correct |
1 ms |
492 KB |
Output is correct |
51 |
Correct |
1 ms |
492 KB |
Output is correct |
52 |
Correct |
1 ms |
492 KB |
Output is correct |
53 |
Correct |
1 ms |
492 KB |
Output is correct |
54 |
Correct |
1 ms |
492 KB |
Output is correct |
55 |
Correct |
1 ms |
492 KB |
Output is correct |
56 |
Correct |
1 ms |
492 KB |
Output is correct |
57 |
Correct |
1 ms |
492 KB |
Output is correct |
58 |
Correct |
1 ms |
492 KB |
Output is correct |
59 |
Correct |
1 ms |
364 KB |
Output is correct |
60 |
Correct |
1 ms |
364 KB |
Output is correct |
61 |
Correct |
1 ms |
364 KB |
Output is correct |
62 |
Correct |
1 ms |
364 KB |
Output is correct |
63 |
Correct |
1 ms |
364 KB |
Output is correct |
64 |
Correct |
1 ms |
364 KB |
Output is correct |
65 |
Correct |
54 ms |
50060 KB |
Output is correct |
66 |
Correct |
60 ms |
50196 KB |
Output is correct |
67 |
Correct |
58 ms |
50188 KB |
Output is correct |
68 |
Correct |
54 ms |
50060 KB |
Output is correct |
69 |
Correct |
52 ms |
50060 KB |
Output is correct |
70 |
Correct |
49 ms |
50060 KB |
Output is correct |
71 |
Correct |
52 ms |
50060 KB |
Output is correct |
72 |
Correct |
57 ms |
50060 KB |
Output is correct |
73 |
Correct |
53 ms |
50060 KB |
Output is correct |
74 |
Correct |
60 ms |
50188 KB |
Output is correct |
75 |
Correct |
54 ms |
50060 KB |
Output is correct |
76 |
Correct |
54 ms |
50060 KB |
Output is correct |
77 |
Correct |
64 ms |
50060 KB |
Output is correct |
78 |
Correct |
51 ms |
50060 KB |
Output is correct |
79 |
Correct |
53 ms |
50060 KB |
Output is correct |
80 |
Correct |
50 ms |
50060 KB |
Output is correct |
81 |
Correct |
57 ms |
50060 KB |
Output is correct |
82 |
Correct |
51 ms |
50060 KB |
Output is correct |
83 |
Correct |
59 ms |
50060 KB |
Output is correct |
84 |
Correct |
63 ms |
50060 KB |
Output is correct |
85 |
Correct |
60 ms |
50060 KB |
Output is correct |
86 |
Correct |
58 ms |
50096 KB |
Output is correct |
87 |
Correct |
59 ms |
50060 KB |
Output is correct |
88 |
Correct |
59 ms |
50060 KB |
Output is correct |
89 |
Correct |
59 ms |
50060 KB |
Output is correct |
90 |
Correct |
59 ms |
50060 KB |
Output is correct |
91 |
Correct |
63 ms |
50060 KB |
Output is correct |
92 |
Correct |
66 ms |
50060 KB |
Output is correct |
93 |
Correct |
67 ms |
50056 KB |
Output is correct |
94 |
Correct |
66 ms |
50060 KB |
Output is correct |
95 |
Correct |
68 ms |
50188 KB |
Output is correct |
96 |
Correct |
65 ms |
50188 KB |
Output is correct |
97 |
Correct |
66 ms |
50060 KB |
Output is correct |
98 |
Correct |
73 ms |
50060 KB |
Output is correct |
99 |
Correct |
67 ms |
50060 KB |
Output is correct |
100 |
Correct |
68 ms |
50060 KB |
Output is correct |
101 |
Correct |
75 ms |
50060 KB |
Output is correct |
102 |
Correct |
67 ms |
50060 KB |
Output is correct |