oj.uz

Submission #410275

# Submission time Handle Problem Language Result Execution time Memory
410275 2021-05-22T11:52:44 Z alireza_kaviani Lamps (JOI19_lamps) C++11
100 / 100
 84 ms 16036 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;

#define all(x)						(x).begin(),(x).end()
#define X							first
#define Y							second
#define sep							' '
#define endl						'\n'
#define SZ(x)						ll(x.size())

const ll MAXN = 1e6 + 10;
const ll LOG = 22;
const ll INF = 8e18;
const ll MOD = 1e9 + 7; //998244353; //1e9 + 9;

int n , dp[MAXN][3];
string s , t;

int valid(int i , int j){
	if(i < 0)	return 1;
	if(j == 0)	return (s[i] == t[i]);
	if(j == 1)	return (t[i] == '0');
	if(j == 2)	return (t[i] == '1');
}

int main() {
    ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);

	cin >> n >> s >> t;
	s = "." + s; t = "." + t;
	dp[0][1] = dp[0][2] = MOD;
	for(int i = 1 ; i <= n ; i++){
		for(int j = 0 ; j < 3 ; j++){
			dp[i][j] = MOD;
			for(int k = 0 ; k < 3 ; k++){
				dp[i][j] = min(dp[i][j] , dp[i - 1][k] + ((j != k) + (j != k && j > 0 && k > 0)) + (valid(i , j) != valid(i - 1 , k)));
				//cout << dp[i - 1][k] + (j != k) + (valid(i , j) != valid(i - 1 , k)) << sep;
			}
			//cout << dp[i][j] << endl;
		}
		//cout << "==========" << endl;
	}
	int ans = MOD;
	for(int i = 0 ; i < 3 ; i++){
		ans = min(ans , dp[n][i] + (i != 0) + 1 - valid(n , i));
	}
	cout << ans / 2 << endl;

    return 0;
}
/*

*/

Compilation message

lamp.cpp: In function 'int valid(int, int)':
lamp.cpp:28:1: warning: control reaches end of non-void function [-Wreturn-type]
   28 | }
      | ^

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 1 ms 328 KB Output is correct
23 Correct 1 ms 204 KB Output is correct
24 Correct 1 ms 204 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 1 ms 204 KB Output is correct
27 Correct 1 ms 204 KB Output is correct
28 Correct 1 ms 204 KB Output is correct
29 Correct 1 ms 204 KB Output is correct
30 Correct 1 ms 204 KB Output is correct
31 Correct 1 ms 204 KB Output is correct
32 Correct 1 ms 204 KB Output is correct
33 Correct 1 ms 204 KB Output is correct
34 Correct 1 ms 204 KB Output is correct

Subtask #2
41.0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 1 ms 328 KB Output is correct
23 Correct 1 ms 204 KB Output is correct
24 Correct 1 ms 204 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 1 ms 204 KB Output is correct
27 Correct 1 ms 204 KB Output is correct
28 Correct 1 ms 204 KB Output is correct
29 Correct 1 ms 204 KB Output is correct
30 Correct 1 ms 204 KB Output is correct
31 Correct 1 ms 204 KB Output is correct
32 Correct 1 ms 204 KB Output is correct
33 Correct 1 ms 204 KB Output is correct
34 Correct 1 ms 204 KB Output is correct
35 Correct 1 ms 332 KB Output is correct
36 Correct 1 ms 332 KB Output is correct
37 Correct 1 ms 332 KB Output is correct
38 Correct 2 ms 332 KB Output is correct
39 Correct 1 ms 332 KB Output is correct
40 Correct 1 ms 332 KB Output is correct
41 Correct 1 ms 332 KB Output is correct
42 Correct 1 ms 332 KB Output is correct
43 Correct 1 ms 332 KB Output is correct
44 Correct 1 ms 332 KB Output is correct
45 Correct 1 ms 332 KB Output is correct
46 Correct 1 ms 332 KB Output is correct
47 Correct 1 ms 332 KB Output is correct
48 Correct 1 ms 332 KB Output is correct
49 Correct 1 ms 332 KB Output is correct
50 Correct 1 ms 332 KB Output is correct
51 Correct 1 ms 332 KB Output is correct
52 Correct 1 ms 324 KB Output is correct
53 Correct 1 ms 332 KB Output is correct
54 Correct 2 ms 332 KB Output is correct
55 Correct 1 ms 324 KB Output is correct
56 Correct 1 ms 332 KB Output is correct
57 Correct 1 ms 332 KB Output is correct
58 Correct 1 ms 324 KB Output is correct

Subtask #3
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 62 ms 14096 KB Output is correct
8 Correct 64 ms 14044 KB Output is correct
9 Correct 63 ms 13892 KB Output is correct
10 Correct 63 ms 13924 KB Output is correct
11 Correct 63 ms 13912 KB Output is correct
12 Correct 66 ms 13912 KB Output is correct
13 Correct 84 ms 14004 KB Output is correct
14 Correct 62 ms 13920 KB Output is correct

Subtask #4
49.0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 1 ms 328 KB Output is correct
23 Correct 1 ms 204 KB Output is correct
24 Correct 1 ms 204 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 1 ms 204 KB Output is correct
27 Correct 1 ms 204 KB Output is correct
28 Correct 1 ms 204 KB Output is correct
29 Correct 1 ms 204 KB Output is correct
30 Correct 1 ms 204 KB Output is correct
31 Correct 1 ms 204 KB Output is correct
32 Correct 1 ms 204 KB Output is correct
33 Correct 1 ms 204 KB Output is correct
34 Correct 1 ms 204 KB Output is correct
35 Correct 1 ms 332 KB Output is correct
36 Correct 1 ms 332 KB Output is correct
37 Correct 1 ms 332 KB Output is correct
38 Correct 2 ms 332 KB Output is correct
39 Correct 1 ms 332 KB Output is correct
40 Correct 1 ms 332 KB Output is correct
41 Correct 1 ms 332 KB Output is correct
42 Correct 1 ms 332 KB Output is correct
43 Correct 1 ms 332 KB Output is correct
44 Correct 1 ms 332 KB Output is correct
45 Correct 1 ms 332 KB Output is correct
46 Correct 1 ms 332 KB Output is correct
47 Correct 1 ms 332 KB Output is correct
48 Correct 1 ms 332 KB Output is correct
49 Correct 1 ms 332 KB Output is correct
50 Correct 1 ms 332 KB Output is correct
51 Correct 1 ms 332 KB Output is correct
52 Correct 1 ms 324 KB Output is correct
53 Correct 1 ms 332 KB Output is correct
54 Correct 2 ms 332 KB Output is correct
55 Correct 1 ms 324 KB Output is correct
56 Correct 1 ms 332 KB Output is correct
57 Correct 1 ms 332 KB Output is correct
58 Correct 1 ms 324 KB Output is correct
59 Correct 1 ms 204 KB Output is correct
60 Correct 1 ms 204 KB Output is correct
61 Correct 1 ms 204 KB Output is correct
62 Correct 1 ms 204 KB Output is correct
63 Correct 1 ms 204 KB Output is correct
64 Correct 1 ms 204 KB Output is correct
65 Correct 62 ms 14096 KB Output is correct
66 Correct 64 ms 14044 KB Output is correct
67 Correct 63 ms 13892 KB Output is correct
68 Correct 63 ms 13924 KB Output is correct
69 Correct 63 ms 13912 KB Output is correct
70 Correct 66 ms 13912 KB Output is correct
71 Correct 84 ms 14004 KB Output is correct
72 Correct 62 ms 13920 KB Output is correct
73 Correct 61 ms 15928 KB Output is correct
74 Correct 62 ms 15964 KB Output is correct
75 Correct 65 ms 15992 KB Output is correct
76 Correct 67 ms 16036 KB Output is correct
77 Correct 61 ms 15948 KB Output is correct
78 Correct 67 ms 15844 KB Output is correct
79 Correct 63 ms 15876 KB Output is correct
80 Correct 64 ms 15940 KB Output is correct
81 Correct 64 ms 15972 KB Output is correct
82 Correct 62 ms 15888 KB Output is correct
83 Correct 68 ms 15904 KB Output is correct
84 Correct 75 ms 15848 KB Output is correct
85 Correct 82 ms 15964 KB Output is correct
86 Correct 63 ms 15944 KB Output is correct
87 Correct 67 ms 15944 KB Output is correct
88 Correct 64 ms 15848 KB Output is correct
89 Correct 63 ms 15848 KB Output is correct
90 Correct 64 ms 15896 KB Output is correct
91 Correct 78 ms 15844 KB Output is correct
92 Correct 63 ms 15848 KB Output is correct
93 Correct 62 ms 15928 KB Output is correct
94 Correct 61 ms 15844 KB Output is correct
95 Correct 78 ms 15956 KB Output is correct
96 Correct 72 ms 15912 KB Output is correct
97 Correct 63 ms 15960 KB Output is correct
98 Correct 66 ms 16020 KB Output is correct
99 Correct 62 ms 15896 KB Output is correct
100 Correct 80 ms 15928 KB Output is correct
101 Correct 64 ms 15900 KB Output is correct
102 Correct 64 ms 15948 KB Output is correct