oj.uz

Submission #810533

# Submission time Handle Problem Language Result Execution time Memory
810533 2023-08-06T10:53:11 Z ymm Colors (BOI20_colors) C++17
9 / 100
 1 ms 336 KB 
#include <bits/stdc++.h>
typedef long long ll;
using namespace std;

set<ll> S;
ll n;
bool query(ll x)
{
	assert(0 <= x && x < n && !S.count(x));
	S.insert(x);
	int d;
	printf("? %lld\n", x+1);
	fflush(stdout);
	scanf("%d", &d);
	return d;
}

int main()
{
	scanf("%lld", &n);
	query(0);
	ll ans = 1;
	ll pos = 0;
	for (int i = 0; i < n-1; ++i) {
		ll pos2 = i%2? n-pos: n-1-pos;
		if (!query(pos2)) {
			ans = abs(pos-pos2)+1;
			break;
		}
		pos = pos2;
	}
	printf("= %lld\n", ans);
}

Compilation message

Colors.cpp: In function 'bool query(ll)':
Colors.cpp:14:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |  scanf("%d", &d);
      |  ~~~~~^~~~~~~~~~
Colors.cpp: In function 'int main()':
Colors.cpp:20:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |  scanf("%lld", &n);
      |  ~~~~~^~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB OK (5 queries)
2 Correct 0 ms 208 KB OK (6 queries)
3 Correct 0 ms 208 KB OK (10 queries)
4 Correct 1 ms 208 KB OK (26 queries)
5 Correct 0 ms 208 KB OK (13 queries)
6 Correct 0 ms 208 KB OK (26 queries)
7 Correct 0 ms 208 KB OK (17 queries)
8 Correct 0 ms 208 KB OK (7 queries)
9 Correct 0 ms 208 KB OK (9 queries)
10 Correct 0 ms 208 KB OK (11 queries)
11 Correct 0 ms 208 KB OK (4 queries)
12 Correct 0 ms 208 KB OK (5 queries)
13 Correct 0 ms 208 KB OK (11 queries)
14 Correct 1 ms 208 KB OK (16 queries)
15 Correct 0 ms 208 KB OK (11 queries)
16 Correct 1 ms 208 KB OK (34 queries)
17 Correct 0 ms 208 KB OK (2 queries)
18 Correct 0 ms 208 KB OK (16 queries)
19 Correct 0 ms 208 KB OK (3 queries)
20 Correct 1 ms 208 KB OK (31 queries)
21 Correct 0 ms 208 KB OK (9 queries)
22 Correct 0 ms 208 KB OK (2 queries)
23 Correct 1 ms 208 KB OK (2 queries)
24 Correct 0 ms 208 KB OK (2 queries)
25 Correct 0 ms 208 KB OK (3 queries)
26 Correct 1 ms 228 KB OK (3 queries)
27 Correct 0 ms 208 KB OK (2 queries)
28 Correct 1 ms 336 KB OK (3 queries)
29 Correct 1 ms 208 KB OK (4 queries)
30 Correct 0 ms 208 KB OK (4 queries)
31 Correct 0 ms 208 KB OK (2 queries)
32 Correct 0 ms 208 KB OK (3 queries)
33 Correct 0 ms 208 KB OK (4 queries)
34 Correct 0 ms 208 KB OK (5 queries)
35 Correct 1 ms 208 KB OK (5 queries)
36 Correct 0 ms 208 KB OK (2 queries)
37 Correct 0 ms 208 KB OK (3 queries)
38 Correct 0 ms 208 KB OK (4 queries)
39 Correct 0 ms 208 KB OK (5 queries)
40 Correct 0 ms 208 KB OK (6 queries)
41 Correct 0 ms 208 KB OK (6 queries)
42 Correct 0 ms 208 KB OK (2 queries)
43 Correct 0 ms 208 KB OK (3 queries)
44 Correct 0 ms 208 KB OK (4 queries)
45 Correct 0 ms 208 KB OK (5 queries)
46 Correct 1 ms 208 KB OK (6 queries)
47 Correct 0 ms 208 KB OK (7 queries)
48 Correct 1 ms 208 KB OK (7 queries)
49 Correct 0 ms 208 KB OK (2 queries)
50 Correct 0 ms 208 KB OK (3 queries)
51 Correct 0 ms 208 KB OK (4 queries)
52 Correct 0 ms 208 KB OK (5 queries)
53 Correct 0 ms 292 KB OK (6 queries)
54 Correct 0 ms 208 KB OK (7 queries)
55 Correct 0 ms 208 KB OK (8 queries)
56 Correct 1 ms 208 KB OK (8 queries)
57 Correct 0 ms 208 KB OK (3 queries)
58 Correct 1 ms 256 KB OK (2 queries)
59 Correct 1 ms 256 KB OK (3 queries)
60 Correct 1 ms 208 KB OK (2 queries)
61 Correct 1 ms 208 KB OK (63 queries)
62 Correct 0 ms 208 KB OK (2 queries)
63 Correct 1 ms 296 KB OK (63 queries)
64 Correct 1 ms 208 KB OK (3 queries)
65 Correct 1 ms 208 KB OK (62 queries)
66 Correct 0 ms 208 KB OK (4 queries)
67 Correct 1 ms 208 KB OK (61 queries)
68 Correct 0 ms 208 KB OK (5 queries)
69 Correct 1 ms 208 KB OK (60 queries)
70 Correct 0 ms 208 KB OK (6 queries)

Subtask #2
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB OK (5 queries)
2 Correct 0 ms 208 KB OK (6 queries)
3 Correct 0 ms 208 KB OK (10 queries)
4 Correct 1 ms 208 KB OK (26 queries)
5 Correct 0 ms 208 KB OK (13 queries)
6 Correct 0 ms 208 KB OK (26 queries)
7 Correct 0 ms 208 KB OK (17 queries)
8 Correct 0 ms 208 KB OK (7 queries)
9 Correct 0 ms 208 KB OK (9 queries)
10 Correct 0 ms 208 KB OK (11 queries)
11 Correct 0 ms 208 KB OK (4 queries)
12 Correct 0 ms 208 KB OK (5 queries)
13 Correct 0 ms 208 KB OK (11 queries)
14 Correct 1 ms 208 KB OK (16 queries)
15 Correct 0 ms 208 KB OK (11 queries)
16 Correct 1 ms 208 KB OK (34 queries)
17 Correct 0 ms 208 KB OK (2 queries)
18 Correct 0 ms 208 KB OK (16 queries)
19 Correct 0 ms 208 KB OK (3 queries)
20 Correct 1 ms 208 KB OK (31 queries)
21 Correct 0 ms 208 KB OK (9 queries)
22 Correct 0 ms 208 KB OK (2 queries)
23 Correct 1 ms 208 KB OK (2 queries)
24 Correct 0 ms 208 KB OK (2 queries)
25 Correct 0 ms 208 KB OK (3 queries)
26 Correct 1 ms 228 KB OK (3 queries)
27 Correct 0 ms 208 KB OK (2 queries)
28 Correct 1 ms 336 KB OK (3 queries)
29 Correct 1 ms 208 KB OK (4 queries)
30 Correct 0 ms 208 KB OK (4 queries)
31 Correct 0 ms 208 KB OK (2 queries)
32 Correct 0 ms 208 KB OK (3 queries)
33 Correct 0 ms 208 KB OK (4 queries)
34 Correct 0 ms 208 KB OK (5 queries)
35 Correct 1 ms 208 KB OK (5 queries)
36 Correct 0 ms 208 KB OK (2 queries)
37 Correct 0 ms 208 KB OK (3 queries)
38 Correct 0 ms 208 KB OK (4 queries)
39 Correct 0 ms 208 KB OK (5 queries)
40 Correct 0 ms 208 KB OK (6 queries)
41 Correct 0 ms 208 KB OK (6 queries)
42 Correct 0 ms 208 KB OK (2 queries)
43 Correct 0 ms 208 KB OK (3 queries)
44 Correct 0 ms 208 KB OK (4 queries)
45 Correct 0 ms 208 KB OK (5 queries)
46 Correct 1 ms 208 KB OK (6 queries)
47 Correct 0 ms 208 KB OK (7 queries)
48 Correct 1 ms 208 KB OK (7 queries)
49 Correct 0 ms 208 KB OK (2 queries)
50 Correct 0 ms 208 KB OK (3 queries)
51 Correct 0 ms 208 KB OK (4 queries)
52 Correct 0 ms 208 KB OK (5 queries)
53 Correct 0 ms 292 KB OK (6 queries)
54 Correct 0 ms 208 KB OK (7 queries)
55 Correct 0 ms 208 KB OK (8 queries)
56 Correct 1 ms 208 KB OK (8 queries)
57 Correct 0 ms 208 KB OK (3 queries)
58 Correct 1 ms 256 KB OK (2 queries)
59 Correct 1 ms 256 KB OK (3 queries)
60 Correct 1 ms 208 KB OK (2 queries)
61 Correct 1 ms 208 KB OK (63 queries)
62 Correct 0 ms 208 KB OK (2 queries)
63 Correct 1 ms 296 KB OK (63 queries)
64 Correct 1 ms 208 KB OK (3 queries)
65 Correct 1 ms 208 KB OK (62 queries)
66 Correct 0 ms 208 KB OK (4 queries)
67 Correct 1 ms 208 KB OK (61 queries)
68 Correct 0 ms 208 KB OK (5 queries)
69 Correct 1 ms 208 KB OK (60 queries)
70 Correct 0 ms 208 KB OK (6 queries)
71 Incorrect 1 ms 208 KB Query limit exceeded
72 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB OK (5 queries)
2 Correct 0 ms 208 KB OK (6 queries)
3 Correct 0 ms 208 KB OK (10 queries)
4 Correct 1 ms 208 KB OK (26 queries)
5 Correct 0 ms 208 KB OK (13 queries)
6 Correct 0 ms 208 KB OK (26 queries)
7 Correct 0 ms 208 KB OK (17 queries)
8 Correct 0 ms 208 KB OK (7 queries)
9 Correct 0 ms 208 KB OK (9 queries)
10 Correct 0 ms 208 KB OK (11 queries)
11 Correct 0 ms 208 KB OK (4 queries)
12 Correct 0 ms 208 KB OK (5 queries)
13 Correct 0 ms 208 KB OK (11 queries)
14 Correct 1 ms 208 KB OK (16 queries)
15 Correct 0 ms 208 KB OK (11 queries)
16 Correct 1 ms 208 KB OK (34 queries)
17 Correct 0 ms 208 KB OK (2 queries)
18 Correct 0 ms 208 KB OK (16 queries)
19 Correct 0 ms 208 KB OK (3 queries)
20 Correct 1 ms 208 KB OK (31 queries)
21 Correct 0 ms 208 KB OK (9 queries)
22 Correct 0 ms 208 KB OK (2 queries)
23 Correct 1 ms 208 KB OK (2 queries)
24 Correct 0 ms 208 KB OK (2 queries)
25 Correct 0 ms 208 KB OK (3 queries)
26 Correct 1 ms 228 KB OK (3 queries)
27 Correct 0 ms 208 KB OK (2 queries)
28 Correct 1 ms 336 KB OK (3 queries)
29 Correct 1 ms 208 KB OK (4 queries)
30 Correct 0 ms 208 KB OK (4 queries)
31 Correct 0 ms 208 KB OK (2 queries)
32 Correct 0 ms 208 KB OK (3 queries)
33 Correct 0 ms 208 KB OK (4 queries)
34 Correct 0 ms 208 KB OK (5 queries)
35 Correct 1 ms 208 KB OK (5 queries)
36 Correct 0 ms 208 KB OK (2 queries)
37 Correct 0 ms 208 KB OK (3 queries)
38 Correct 0 ms 208 KB OK (4 queries)
39 Correct 0 ms 208 KB OK (5 queries)
40 Correct 0 ms 208 KB OK (6 queries)
41 Correct 0 ms 208 KB OK (6 queries)
42 Correct 0 ms 208 KB OK (2 queries)
43 Correct 0 ms 208 KB OK (3 queries)
44 Correct 0 ms 208 KB OK (4 queries)
45 Correct 0 ms 208 KB OK (5 queries)
46 Correct 1 ms 208 KB OK (6 queries)
47 Correct 0 ms 208 KB OK (7 queries)
48 Correct 1 ms 208 KB OK (7 queries)
49 Correct 0 ms 208 KB OK (2 queries)
50 Correct 0 ms 208 KB OK (3 queries)
51 Correct 0 ms 208 KB OK (4 queries)
52 Correct 0 ms 208 KB OK (5 queries)
53 Correct 0 ms 292 KB OK (6 queries)
54 Correct 0 ms 208 KB OK (7 queries)
55 Correct 0 ms 208 KB OK (8 queries)
56 Correct 1 ms 208 KB OK (8 queries)
57 Correct 0 ms 208 KB OK (3 queries)
58 Correct 1 ms 256 KB OK (2 queries)
59 Correct 1 ms 256 KB OK (3 queries)
60 Correct 1 ms 208 KB OK (2 queries)
61 Correct 1 ms 208 KB OK (63 queries)
62 Correct 0 ms 208 KB OK (2 queries)
63 Correct 1 ms 296 KB OK (63 queries)
64 Correct 1 ms 208 KB OK (3 queries)
65 Correct 1 ms 208 KB OK (62 queries)
66 Correct 0 ms 208 KB OK (4 queries)
67 Correct 1 ms 208 KB OK (61 queries)
68 Correct 0 ms 208 KB OK (5 queries)
69 Correct 1 ms 208 KB OK (60 queries)
70 Correct 0 ms 208 KB OK (6 queries)
71 Incorrect 1 ms 208 KB Query limit exceeded
72 Halted 0 ms 0 KB -

Subtask #4
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB OK (5 queries)
2 Correct 0 ms 208 KB OK (6 queries)
3 Correct 0 ms 208 KB OK (10 queries)
4 Correct 1 ms 208 KB OK (26 queries)
5 Correct 0 ms 208 KB OK (13 queries)
6 Correct 0 ms 208 KB OK (26 queries)
7 Correct 0 ms 208 KB OK (17 queries)
8 Correct 0 ms 208 KB OK (7 queries)
9 Correct 0 ms 208 KB OK (9 queries)
10 Correct 0 ms 208 KB OK (11 queries)
11 Correct 0 ms 208 KB OK (4 queries)
12 Correct 0 ms 208 KB OK (5 queries)
13 Correct 0 ms 208 KB OK (11 queries)
14 Correct 1 ms 208 KB OK (16 queries)
15 Correct 0 ms 208 KB OK (11 queries)
16 Correct 1 ms 208 KB OK (34 queries)
17 Correct 0 ms 208 KB OK (2 queries)
18 Correct 0 ms 208 KB OK (16 queries)
19 Correct 0 ms 208 KB OK (3 queries)
20 Correct 1 ms 208 KB OK (31 queries)
21 Correct 0 ms 208 KB OK (9 queries)
22 Correct 0 ms 208 KB OK (2 queries)
23 Correct 1 ms 208 KB OK (2 queries)
24 Correct 0 ms 208 KB OK (2 queries)
25 Correct 0 ms 208 KB OK (3 queries)
26 Correct 1 ms 228 KB OK (3 queries)
27 Correct 0 ms 208 KB OK (2 queries)
28 Correct 1 ms 336 KB OK (3 queries)
29 Correct 1 ms 208 KB OK (4 queries)
30 Correct 0 ms 208 KB OK (4 queries)
31 Correct 0 ms 208 KB OK (2 queries)
32 Correct 0 ms 208 KB OK (3 queries)
33 Correct 0 ms 208 KB OK (4 queries)
34 Correct 0 ms 208 KB OK (5 queries)
35 Correct 1 ms 208 KB OK (5 queries)
36 Correct 0 ms 208 KB OK (2 queries)
37 Correct 0 ms 208 KB OK (3 queries)
38 Correct 0 ms 208 KB OK (4 queries)
39 Correct 0 ms 208 KB OK (5 queries)
40 Correct 0 ms 208 KB OK (6 queries)
41 Correct 0 ms 208 KB OK (6 queries)
42 Correct 0 ms 208 KB OK (2 queries)
43 Correct 0 ms 208 KB OK (3 queries)
44 Correct 0 ms 208 KB OK (4 queries)
45 Correct 0 ms 208 KB OK (5 queries)
46 Correct 1 ms 208 KB OK (6 queries)
47 Correct 0 ms 208 KB OK (7 queries)
48 Correct 1 ms 208 KB OK (7 queries)
49 Correct 0 ms 208 KB OK (2 queries)
50 Correct 0 ms 208 KB OK (3 queries)
51 Correct 0 ms 208 KB OK (4 queries)
52 Correct 0 ms 208 KB OK (5 queries)
53 Correct 0 ms 292 KB OK (6 queries)
54 Correct 0 ms 208 KB OK (7 queries)
55 Correct 0 ms 208 KB OK (8 queries)
56 Correct 1 ms 208 KB OK (8 queries)
57 Correct 0 ms 208 KB OK (3 queries)
58 Correct 1 ms 256 KB OK (2 queries)
59 Correct 1 ms 256 KB OK (3 queries)
60 Correct 1 ms 208 KB OK (2 queries)
61 Correct 1 ms 208 KB OK (63 queries)
62 Correct 0 ms 208 KB OK (2 queries)
63 Correct 1 ms 296 KB OK (63 queries)
64 Correct 1 ms 208 KB OK (3 queries)
65 Correct 1 ms 208 KB OK (62 queries)
66 Correct 0 ms 208 KB OK (4 queries)
67 Correct 1 ms 208 KB OK (61 queries)
68 Correct 0 ms 208 KB OK (5 queries)
69 Correct 1 ms 208 KB OK (60 queries)
70 Correct 0 ms 208 KB OK (6 queries)
71 Incorrect 1 ms 208 KB Query limit exceeded
72 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB OK (5 queries)
2 Correct 0 ms 208 KB OK (6 queries)
3 Correct 0 ms 208 KB OK (10 queries)
4 Correct 1 ms 208 KB OK (26 queries)
5 Correct 0 ms 208 KB OK (13 queries)
6 Correct 0 ms 208 KB OK (26 queries)
7 Correct 0 ms 208 KB OK (17 queries)
8 Correct 0 ms 208 KB OK (7 queries)
9 Correct 0 ms 208 KB OK (9 queries)
10 Correct 0 ms 208 KB OK (11 queries)
11 Correct 0 ms 208 KB OK (4 queries)
12 Correct 0 ms 208 KB OK (5 queries)
13 Correct 0 ms 208 KB OK (11 queries)
14 Correct 1 ms 208 KB OK (16 queries)
15 Correct 0 ms 208 KB OK (11 queries)
16 Correct 1 ms 208 KB OK (34 queries)
17 Correct 0 ms 208 KB OK (2 queries)
18 Correct 0 ms 208 KB OK (16 queries)
19 Correct 0 ms 208 KB OK (3 queries)
20 Correct 1 ms 208 KB OK (31 queries)
21 Correct 0 ms 208 KB OK (9 queries)
22 Correct 0 ms 208 KB OK (2 queries)
23 Correct 1 ms 208 KB OK (2 queries)
24 Correct 0 ms 208 KB OK (2 queries)
25 Correct 0 ms 208 KB OK (3 queries)
26 Correct 1 ms 228 KB OK (3 queries)
27 Correct 0 ms 208 KB OK (2 queries)
28 Correct 1 ms 336 KB OK (3 queries)
29 Correct 1 ms 208 KB OK (4 queries)
30 Correct 0 ms 208 KB OK (4 queries)
31 Correct 0 ms 208 KB OK (2 queries)
32 Correct 0 ms 208 KB OK (3 queries)
33 Correct 0 ms 208 KB OK (4 queries)
34 Correct 0 ms 208 KB OK (5 queries)
35 Correct 1 ms 208 KB OK (5 queries)
36 Correct 0 ms 208 KB OK (2 queries)
37 Correct 0 ms 208 KB OK (3 queries)
38 Correct 0 ms 208 KB OK (4 queries)
39 Correct 0 ms 208 KB OK (5 queries)
40 Correct 0 ms 208 KB OK (6 queries)
41 Correct 0 ms 208 KB OK (6 queries)
42 Correct 0 ms 208 KB OK (2 queries)
43 Correct 0 ms 208 KB OK (3 queries)
44 Correct 0 ms 208 KB OK (4 queries)
45 Correct 0 ms 208 KB OK (5 queries)
46 Correct 1 ms 208 KB OK (6 queries)
47 Correct 0 ms 208 KB OK (7 queries)
48 Correct 1 ms 208 KB OK (7 queries)
49 Correct 0 ms 208 KB OK (2 queries)
50 Correct 0 ms 208 KB OK (3 queries)
51 Correct 0 ms 208 KB OK (4 queries)
52 Correct 0 ms 208 KB OK (5 queries)
53 Correct 0 ms 292 KB OK (6 queries)
54 Correct 0 ms 208 KB OK (7 queries)
55 Correct 0 ms 208 KB OK (8 queries)
56 Correct 1 ms 208 KB OK (8 queries)
57 Correct 0 ms 208 KB OK (3 queries)
58 Correct 1 ms 256 KB OK (2 queries)
59 Correct 1 ms 256 KB OK (3 queries)
60 Correct 1 ms 208 KB OK (2 queries)
61 Correct 1 ms 208 KB OK (63 queries)
62 Correct 0 ms 208 KB OK (2 queries)
63 Correct 1 ms 296 KB OK (63 queries)
64 Correct 1 ms 208 KB OK (3 queries)
65 Correct 1 ms 208 KB OK (62 queries)
66 Correct 0 ms 208 KB OK (4 queries)
67 Correct 1 ms 208 KB OK (61 queries)
68 Correct 0 ms 208 KB OK (5 queries)
69 Correct 1 ms 208 KB OK (60 queries)
70 Correct 0 ms 208 KB OK (6 queries)
71 Incorrect 1 ms 208 KB Query limit exceeded
72 Halted 0 ms 0 KB -