oj.uz

답안 #377176

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
377176 2021-03-13T08:03:00 Z 8e7 Lamps (JOI19_lamps) C++14
100 / 100
 43 ms 39740 KB 
//Challenge: Accepted
#include <iostream>
#include <algorithm>
#include <vector>
#include <utility>
#define ll long long
#define maxn 1000005
#define pii pair<int, int>
#define ff first
#define ss second
#define io ios_base::sync_with_stdio(0);cin.tie(0);
using namespace std;
string sa, sb;

int a[maxn], b[maxn], pref[maxn], diff[maxn], pdif[maxn];
int dp[maxn];
int mi[maxn], m0[maxn], m1[maxn];

inline int seg(int l, int r) {
	if (l > r) return 0;
	return pref[r] - (l ? pref[l - 1] : 0);
}
int main() {
	io
	int n;
	cin >> n;
	cin >> sa >> sb;
	sa += '0', sb += '0';
	reverse(sa.begin(), sa.end());
	reverse(sb.begin(), sb.end());
	sa += '0', sb += '0';
	n += 2;
	for (int i = 0;i < n;i++) {
		a[i] = (sa[i] == '1') ^ (i ? (sa[i - 1] == '1') : 0);
		b[i] = (sb[i] == '1') ^ (i ? (sb[i - 1] == '1') : 0);
		diff[i] = a[i] ^ b[i];
		pref[i] = (b[i] == 1 ? 1 : 0) + (i ? pref[i - 1] : 0);
		pdif[i] = diff[i] + (i ? pdif[i - 1] : 0);
		//cout << pref[i] << " " << pdif[i] << endl;
	}
	for (int i = 0;i < n;i++) {
		dp[i] = pdif[i] + (i ? mi[i - 1] : 0);
		if (i > 1) {
			dp[i] = min(dp[i], dp[i - 2] + 4 - diff[i] - diff[i + 1]);
		}
		if (i > 2) {
			if (sa[i - 1] == '0') dp[i] = min(dp[i], 4 - diff[i] + pref[i - 1] + m0[i - 3]);
			else dp[i] = min(dp[i], 4 - diff[i] + pref[i - 1] + m1[i - 3]);
		}
		/*
		for (int j = 0;j < i;j++) {
			if (j < i - 1 && sa[j + 1] == sa[i - 1]) { //l == j + 1, r == i - 1;
				dp[i] = min(dp[i], dp[j] + 4 - (diff[i] + diff[j + 1]) + seg(j + 2, i - 1));
			}
		}
		*/
		//cout << dp[i] << " ";
		mi[i] = min(dp[i] - pdif[i], i ? mi[i - 1] : 1<<30);
		if (i < n) {
			m0[i] = (i ? m0[i - 1] : 1<<30);
			m1[i] = (i ? m1[i - 1] : 1<<30);
			if (sa[i + 1] == '0') m0[i] = min(m0[i], dp[i] - diff[i + 1] - pref[i + 1]);
			else m1[i] = min(m1[i], dp[i] - diff[i + 1] - pref[i + 1]);
		}

	}
	//cout << endl;
	cout << (dp[n - 1] + 1) / 2 << "\n";
}
/*
8
11011100
01101001


13
1010010010100
0000111001011

18
001100010010000110
110110001000100101


 */

Subtask #1
6.0 / 6.0

# 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 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 384 KB Output is correct
12 Correct 1 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 384 KB Output is correct
16 Correct 1 ms 376 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 384 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 508 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 384 KB Output is correct

Subtask #2
41.0 / 41.0

# 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 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 384 KB Output is correct
12 Correct 1 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 384 KB Output is correct
16 Correct 1 ms 376 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 384 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 508 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 384 KB Output is correct
35 Correct 1 ms 492 KB Output is correct
36 Correct 1 ms 620 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

Subtask #3
4.0 / 4.0

# 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 33 ms 37692 KB Output is correct
8 Correct 34 ms 39612 KB Output is correct
9 Correct 35 ms 39612 KB Output is correct
10 Correct 34 ms 39640 KB Output is correct
11 Correct 34 ms 39612 KB Output is correct
12 Correct 37 ms 39612 KB Output is correct
13 Correct 34 ms 39612 KB Output is correct
14 Correct 33 ms 39612 KB Output is correct

Subtask #4
49.0 / 49.0

# 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 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 384 KB Output is correct
12 Correct 1 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 384 KB Output is correct
16 Correct 1 ms 376 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 384 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 508 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 384 KB Output is correct
35 Correct 1 ms 492 KB Output is correct
36 Correct 1 ms 620 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 33 ms 37692 KB Output is correct
66 Correct 34 ms 39612 KB Output is correct
67 Correct 35 ms 39612 KB Output is correct
68 Correct 34 ms 39640 KB Output is correct
69 Correct 34 ms 39612 KB Output is correct
70 Correct 37 ms 39612 KB Output is correct
71 Correct 34 ms 39612 KB Output is correct
72 Correct 33 ms 39612 KB Output is correct
73 Correct 41 ms 39612 KB Output is correct
74 Correct 34 ms 39612 KB Output is correct
75 Correct 35 ms 39612 KB Output is correct
76 Correct 34 ms 39612 KB Output is correct
77 Correct 34 ms 39612 KB Output is correct
78 Correct 35 ms 39612 KB Output is correct
79 Correct 37 ms 39612 KB Output is correct
80 Correct 35 ms 39740 KB Output is correct
81 Correct 42 ms 39632 KB Output is correct
82 Correct 34 ms 39612 KB Output is correct
83 Correct 38 ms 39612 KB Output is correct
84 Correct 38 ms 39612 KB Output is correct
85 Correct 39 ms 39612 KB Output is correct
86 Correct 38 ms 39612 KB Output is correct
87 Correct 39 ms 39660 KB Output is correct
88 Correct 39 ms 39612 KB Output is correct
89 Correct 39 ms 39612 KB Output is correct
90 Correct 39 ms 39612 KB Output is correct
91 Correct 39 ms 39612 KB Output is correct
92 Correct 40 ms 39612 KB Output is correct
93 Correct 40 ms 39612 KB Output is correct
94 Correct 39 ms 39612 KB Output is correct
95 Correct 40 ms 39740 KB Output is correct
96 Correct 39 ms 39612 KB Output is correct
97 Correct 39 ms 39612 KB Output is correct
98 Correct 39 ms 39612 KB Output is correct
99 Correct 41 ms 39612 KB Output is correct
100 Correct 39 ms 39612 KB Output is correct
101 Correct 43 ms 39612 KB Output is correct
102 Correct 41 ms 39612 KB Output is correct