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Submission #312901

# Submission time Handle Problem Language Result Execution time Memory
312901 2020-10-14T15:01:04 Z LucaDantas Lamps (JOI19_lamps) C++17
100 / 100
 284 ms 10244 KB 
#include<bits/stdc++.h>
using namespace std;

constexpr int maxn = 1e6+10;

int a[maxn], b[maxn], dp[8], new_dp[8];

int main() {
	int n; scanf("%d", &n);
	for(int i = 1; i <= n; i++) {
		char c; scanf(" %c", &c);
		a[i] = c-'0';
	}
	for(int i = 1; i <= n; i++) {
		char c; scanf(" %c", &c);
		b[i] = c-'0';
	}
	auto get = [](int i, int mask) {
		int opa = a[i];
		if(mask&1) opa = 0;
		if(mask&2) opa = 1;
		if(mask&4) opa ^= 1;
		return opa;
	};
	for(int mask = 1; mask < 8; mask++)
		dp[mask] = n;
	for(int i = 1; i <= n; i++) {
		for(int mask = 0; mask < 8; mask++) {
			new_dp[mask] = n;
			if(get(i, mask) == b[i]) {
				for(int ant = 0; ant < 8; ant++) {
					new_dp[mask] = min(new_dp[mask], dp[ant] + __builtin_popcount(~ant&mask));
				}
			}
		}
		for(int mask = 0; mask < 8; mask++)
			swap(new_dp[mask], dp[mask]);
	}
	int ans = n;
	for(int mask = 0; mask < 8; mask++)
		ans = min(ans, dp[mask]);
	printf("%d\n", ans);
}

Compilation message

lamp.cpp: In function 'int main()':
lamp.cpp:9:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    9 |  int n; scanf("%d", &n);
      |         ~~~~~^~~~~~~~~~
lamp.cpp:11:16: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   11 |   char c; scanf(" %c", &c);
      |           ~~~~~^~~~~~~~~~~
lamp.cpp:15:16: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   15 |   char c; scanf(" %c", &c);
      |           ~~~~~^~~~~~~~~~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 512 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 0 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 288 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 0 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 0 ms 384 KB Output is correct
22 Correct 1 ms 384 KB Output is correct
23 Correct 1 ms 384 KB Output is correct
24 Correct 1 ms 384 KB Output is correct
25 Correct 1 ms 384 KB Output is correct
26 Correct 1 ms 384 KB Output is correct
27 Correct 1 ms 384 KB Output is correct
28 Correct 1 ms 384 KB Output is correct
29 Correct 1 ms 384 KB Output is correct
30 Correct 1 ms 384 KB Output is correct
31 Correct 1 ms 384 KB Output is correct
32 Correct 1 ms 384 KB Output is correct
33 Correct 1 ms 384 KB Output is correct
34 Correct 1 ms 384 KB Output is correct

Subtask #2
41.0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 512 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 0 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 288 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 0 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 0 ms 384 KB Output is correct
22 Correct 1 ms 384 KB Output is correct
23 Correct 1 ms 384 KB Output is correct
24 Correct 1 ms 384 KB Output is correct
25 Correct 1 ms 384 KB Output is correct
26 Correct 1 ms 384 KB Output is correct
27 Correct 1 ms 384 KB Output is correct
28 Correct 1 ms 384 KB Output is correct
29 Correct 1 ms 384 KB Output is correct
30 Correct 1 ms 384 KB Output is correct
31 Correct 1 ms 384 KB Output is correct
32 Correct 1 ms 384 KB Output is correct
33 Correct 1 ms 384 KB Output is correct
34 Correct 1 ms 384 KB Output is correct
35 Correct 1 ms 384 KB Output is correct
36 Correct 1 ms 288 KB Output is correct
37 Correct 1 ms 384 KB Output is correct
38 Correct 1 ms 384 KB Output is correct
39 Correct 1 ms 384 KB Output is correct
40 Correct 1 ms 384 KB Output is correct
41 Correct 1 ms 384 KB Output is correct
42 Correct 1 ms 384 KB Output is correct
43 Correct 1 ms 384 KB Output is correct
44 Correct 1 ms 384 KB Output is correct
45 Correct 1 ms 384 KB Output is correct
46 Correct 1 ms 512 KB Output is correct
47 Correct 1 ms 384 KB Output is correct
48 Correct 1 ms 384 KB Output is correct
49 Correct 1 ms 384 KB Output is correct
50 Correct 1 ms 384 KB Output is correct
51 Correct 1 ms 384 KB Output is correct
52 Correct 1 ms 384 KB Output is correct
53 Correct 1 ms 384 KB Output is correct
54 Correct 1 ms 512 KB Output is correct
55 Correct 1 ms 384 KB Output is correct
56 Correct 1 ms 384 KB Output is correct
57 Correct 1 ms 384 KB Output is correct
58 Correct 2 ms 384 KB Output is correct

Subtask #3
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 259 ms 10104 KB Output is correct
8 Correct 270 ms 10104 KB Output is correct
9 Correct 269 ms 10232 KB Output is correct
10 Correct 266 ms 10244 KB Output is correct
11 Correct 273 ms 10104 KB Output is correct
12 Correct 258 ms 10188 KB Output is correct
13 Correct 253 ms 10104 KB Output is correct
14 Correct 254 ms 10104 KB Output is correct

Subtask #4
49.0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 512 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 0 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 288 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 0 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 0 ms 384 KB Output is correct
22 Correct 1 ms 384 KB Output is correct
23 Correct 1 ms 384 KB Output is correct
24 Correct 1 ms 384 KB Output is correct
25 Correct 1 ms 384 KB Output is correct
26 Correct 1 ms 384 KB Output is correct
27 Correct 1 ms 384 KB Output is correct
28 Correct 1 ms 384 KB Output is correct
29 Correct 1 ms 384 KB Output is correct
30 Correct 1 ms 384 KB Output is correct
31 Correct 1 ms 384 KB Output is correct
32 Correct 1 ms 384 KB Output is correct
33 Correct 1 ms 384 KB Output is correct
34 Correct 1 ms 384 KB Output is correct
35 Correct 1 ms 384 KB Output is correct
36 Correct 1 ms 288 KB Output is correct
37 Correct 1 ms 384 KB Output is correct
38 Correct 1 ms 384 KB Output is correct
39 Correct 1 ms 384 KB Output is correct
40 Correct 1 ms 384 KB Output is correct
41 Correct 1 ms 384 KB Output is correct
42 Correct 1 ms 384 KB Output is correct
43 Correct 1 ms 384 KB Output is correct
44 Correct 1 ms 384 KB Output is correct
45 Correct 1 ms 384 KB Output is correct
46 Correct 1 ms 512 KB Output is correct
47 Correct 1 ms 384 KB Output is correct
48 Correct 1 ms 384 KB Output is correct
49 Correct 1 ms 384 KB Output is correct
50 Correct 1 ms 384 KB Output is correct
51 Correct 1 ms 384 KB Output is correct
52 Correct 1 ms 384 KB Output is correct
53 Correct 1 ms 384 KB Output is correct
54 Correct 1 ms 512 KB Output is correct
55 Correct 1 ms 384 KB Output is correct
56 Correct 1 ms 384 KB Output is correct
57 Correct 1 ms 384 KB Output is correct
58 Correct 2 ms 384 KB Output is correct
59 Correct 0 ms 384 KB Output is correct
60 Correct 1 ms 384 KB Output is correct
61 Correct 1 ms 384 KB Output is correct
62 Correct 1 ms 384 KB Output is correct
63 Correct 1 ms 384 KB Output is correct
64 Correct 0 ms 384 KB Output is correct
65 Correct 259 ms 10104 KB Output is correct
66 Correct 270 ms 10104 KB Output is correct
67 Correct 269 ms 10232 KB Output is correct
68 Correct 266 ms 10244 KB Output is correct
69 Correct 273 ms 10104 KB Output is correct
70 Correct 258 ms 10188 KB Output is correct
71 Correct 253 ms 10104 KB Output is correct
72 Correct 254 ms 10104 KB Output is correct
73 Correct 256 ms 10104 KB Output is correct
74 Correct 262 ms 10104 KB Output is correct
75 Correct 255 ms 10108 KB Output is correct
76 Correct 255 ms 10104 KB Output is correct
77 Correct 262 ms 10108 KB Output is correct
78 Correct 257 ms 10120 KB Output is correct
79 Correct 263 ms 10104 KB Output is correct
80 Correct 263 ms 10104 KB Output is correct
81 Correct 258 ms 10104 KB Output is correct
82 Correct 259 ms 10104 KB Output is correct
83 Correct 272 ms 10232 KB Output is correct
84 Correct 264 ms 10232 KB Output is correct
85 Correct 267 ms 10232 KB Output is correct
86 Correct 272 ms 10104 KB Output is correct
87 Correct 272 ms 10232 KB Output is correct
88 Correct 272 ms 10104 KB Output is correct
89 Correct 266 ms 10104 KB Output is correct
90 Correct 270 ms 10104 KB Output is correct
91 Correct 271 ms 10104 KB Output is correct
92 Correct 278 ms 10104 KB Output is correct
93 Correct 277 ms 10104 KB Output is correct
94 Correct 276 ms 10104 KB Output is correct
95 Correct 284 ms 10232 KB Output is correct
96 Correct 274 ms 10104 KB Output is correct
97 Correct 279 ms 10232 KB Output is correct
98 Correct 276 ms 10104 KB Output is correct
99 Correct 279 ms 10232 KB Output is correct
100 Correct 276 ms 10104 KB Output is correct
101 Correct 279 ms 10232 KB Output is correct
102 Correct 281 ms 10104 KB Output is correct