oj.uz

Submission #810321

# Submission time Handle Problem Language Result Execution time Memory
810321 2023-08-06T08:26:54 Z ymm Colors (BOI20_colors) C++17
0 / 100
 300 ms 256 KB 
#include <bits/stdc++.h>
typedef long long ll;
using namespace std;

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


int main()
{
	ll n;
	scanf("%lld", &n);
	//ll pos = __lg(n-1)+1;
	//query(pos);
	//ll l = 1, r = n;
	//while (l < r) {
	//	ll m0 = (l+r)/2;
	//	ll m;
	//	for (ll i = 0;; ++i) {
	//		ll dard = i%2? i/2+1: -i/2;
	//		ll pos2 = pos + m0 + dard;
	//		if (pos2 < 0 || n <= pos2 || S.count(pos2))
	//			continue;
	//		m = m0+dard;
	//		break;
	//	}
	//	if (query(pos + m)) {
	//		r = m;
	//		pos = pos + m;
	//	} else {
	//		l = m+1;
	//		while (S.count(pos))
	//			--pos;
	//		query(pos);
	//	}
	//}
	ll pos = n/3;
	query(pos);
	ll l = 1, r = n;
	int lst = 0;
	while (l < r) {
		ll m0 = (l+r)/2;
		ll x = lst%2? -1: 1;
		//cerr << l << ' ' << r << ' ' << pos+1 << ' ' << m0 << '\n';
		ll m;
		for (ll i = 0;; ++i) {
			ll dard = i%2? i/2+1: -i/2;
			//ll dard = i%2? -i/2+1: i/2;
			ll pos2 = pos + x*(m0+dard);
			if (pos2 < 0 || n <= pos2 || S.count(pos2))
				continue;
			m = m0+dard;
			break;
		}
		if (query(pos = pos + x*m))
			r = m;
		else
			l = m+1;
		++lst;
	}
	printf("= %lld\n", l);
}

Compilation message

Colors.cpp: In function 'bool query(ll)':
Colors.cpp:13:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |  scanf("%d", &d);
      |  ~~~~~^~~~~~~~~~
Colors.cpp: In function 'int main()':
Colors.cpp:21:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |  scanf("%lld", &n);
      |  ~~~~~^~~~~~~~~~~~

Subtask #1
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB OK (7 queries)
2 Correct 0 ms 208 KB OK (7 queries)
3 Correct 1 ms 208 KB OK (5 queries)
4 Correct 0 ms 208 KB OK (6 queries)
5 Correct 0 ms 208 KB OK (5 queries)
6 Correct 1 ms 208 KB OK (7 queries)
7 Correct 0 ms 208 KB OK (7 queries)
8 Correct 0 ms 208 KB OK (6 queries)
9 Correct 0 ms 208 KB OK (6 queries)
10 Correct 0 ms 208 KB OK (5 queries)
11 Correct 0 ms 208 KB OK (5 queries)
12 Correct 1 ms 208 KB OK (6 queries)
13 Correct 1 ms 208 KB OK (7 queries)
14 Correct 0 ms 208 KB OK (7 queries)
15 Correct 0 ms 208 KB OK (7 queries)
16 Correct 0 ms 208 KB OK (7 queries)
17 Correct 1 ms 208 KB OK (6 queries)
18 Correct 0 ms 208 KB OK (6 queries)
19 Correct 0 ms 208 KB OK (6 queries)
20 Correct 0 ms 208 KB OK (7 queries)
21 Correct 0 ms 208 KB OK (7 queries)
22 Correct 0 ms 208 KB OK (2 queries)
23 Correct 0 ms 208 KB OK (2 queries)
24 Correct 0 ms 208 KB OK (3 queries)
25 Correct 0 ms 208 KB OK (3 queries)
26 Correct 0 ms 208 KB OK (2 queries)
27 Correct 0 ms 208 KB OK (3 queries)
28 Correct 0 ms 208 KB OK (3 queries)
29 Correct 0 ms 208 KB OK (3 queries)
30 Correct 0 ms 208 KB OK (3 queries)
31 Correct 0 ms 208 KB OK (3 queries)
32 Correct 0 ms 208 KB OK (3 queries)
33 Correct 0 ms 208 KB OK (3 queries)
34 Correct 0 ms 208 KB OK (4 queries)
35 Correct 0 ms 208 KB OK (4 queries)
36 Correct 1 ms 208 KB OK (3 queries)
37 Correct 0 ms 208 KB OK (4 queries)
38 Correct 0 ms 208 KB OK (4 queries)
39 Correct 0 ms 208 KB OK (3 queries)
40 Correct 0 ms 208 KB OK (4 queries)
41 Correct 0 ms 208 KB OK (4 queries)
42 Correct 0 ms 256 KB OK (3 queries)
43 Correct 0 ms 208 KB OK (4 queries)
44 Correct 0 ms 208 KB OK (4 queries)
45 Correct 0 ms 208 KB OK (7 queries)
46 Correct 1 ms 208 KB OK (7 queries)
47 Correct 0 ms 208 KB OK (4 queries)
48 Correct 1 ms 208 KB OK (4 queries)
49 Correct 0 ms 208 KB OK (4 queries)
50 Correct 0 ms 208 KB OK (4 queries)
51 Correct 0 ms 208 KB OK (4 queries)
52 Correct 0 ms 208 KB OK (4 queries)
53 Correct 0 ms 208 KB OK (4 queries)
54 Correct 0 ms 208 KB OK (4 queries)
55 Correct 0 ms 208 KB OK (4 queries)
56 Correct 0 ms 208 KB OK (4 queries)
57 Correct 0 ms 208 KB OK (5 queries)
58 Correct 0 ms 208 KB OK (5 queries)
59 Execution timed out 3057 ms 208 KB Time limit exceeded
60 Halted 0 ms 0 KB -

Subtask #2
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB OK (7 queries)
2 Correct 0 ms 208 KB OK (7 queries)
3 Correct 1 ms 208 KB OK (5 queries)
4 Correct 0 ms 208 KB OK (6 queries)
5 Correct 0 ms 208 KB OK (5 queries)
6 Correct 1 ms 208 KB OK (7 queries)
7 Correct 0 ms 208 KB OK (7 queries)
8 Correct 0 ms 208 KB OK (6 queries)
9 Correct 0 ms 208 KB OK (6 queries)
10 Correct 0 ms 208 KB OK (5 queries)
11 Correct 0 ms 208 KB OK (5 queries)
12 Correct 1 ms 208 KB OK (6 queries)
13 Correct 1 ms 208 KB OK (7 queries)
14 Correct 0 ms 208 KB OK (7 queries)
15 Correct 0 ms 208 KB OK (7 queries)
16 Correct 0 ms 208 KB OK (7 queries)
17 Correct 1 ms 208 KB OK (6 queries)
18 Correct 0 ms 208 KB OK (6 queries)
19 Correct 0 ms 208 KB OK (6 queries)
20 Correct 0 ms 208 KB OK (7 queries)
21 Correct 0 ms 208 KB OK (7 queries)
22 Correct 0 ms 208 KB OK (2 queries)
23 Correct 0 ms 208 KB OK (2 queries)
24 Correct 0 ms 208 KB OK (3 queries)
25 Correct 0 ms 208 KB OK (3 queries)
26 Correct 0 ms 208 KB OK (2 queries)
27 Correct 0 ms 208 KB OK (3 queries)
28 Correct 0 ms 208 KB OK (3 queries)
29 Correct 0 ms 208 KB OK (3 queries)
30 Correct 0 ms 208 KB OK (3 queries)
31 Correct 0 ms 208 KB OK (3 queries)
32 Correct 0 ms 208 KB OK (3 queries)
33 Correct 0 ms 208 KB OK (3 queries)
34 Correct 0 ms 208 KB OK (4 queries)
35 Correct 0 ms 208 KB OK (4 queries)
36 Correct 1 ms 208 KB OK (3 queries)
37 Correct 0 ms 208 KB OK (4 queries)
38 Correct 0 ms 208 KB OK (4 queries)
39 Correct 0 ms 208 KB OK (3 queries)
40 Correct 0 ms 208 KB OK (4 queries)
41 Correct 0 ms 208 KB OK (4 queries)
42 Correct 0 ms 256 KB OK (3 queries)
43 Correct 0 ms 208 KB OK (4 queries)
44 Correct 0 ms 208 KB OK (4 queries)
45 Correct 0 ms 208 KB OK (7 queries)
46 Correct 1 ms 208 KB OK (7 queries)
47 Correct 0 ms 208 KB OK (4 queries)
48 Correct 1 ms 208 KB OK (4 queries)
49 Correct 0 ms 208 KB OK (4 queries)
50 Correct 0 ms 208 KB OK (4 queries)
51 Correct 0 ms 208 KB OK (4 queries)
52 Correct 0 ms 208 KB OK (4 queries)
53 Correct 0 ms 208 KB OK (4 queries)
54 Correct 0 ms 208 KB OK (4 queries)
55 Correct 0 ms 208 KB OK (4 queries)
56 Correct 0 ms 208 KB OK (4 queries)
57 Correct 0 ms 208 KB OK (5 queries)
58 Correct 0 ms 208 KB OK (5 queries)
59 Execution timed out 3057 ms 208 KB Time limit exceeded
60 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB OK (7 queries)
2 Correct 0 ms 208 KB OK (7 queries)
3 Correct 1 ms 208 KB OK (5 queries)
4 Correct 0 ms 208 KB OK (6 queries)
5 Correct 0 ms 208 KB OK (5 queries)
6 Correct 1 ms 208 KB OK (7 queries)
7 Correct 0 ms 208 KB OK (7 queries)
8 Correct 0 ms 208 KB OK (6 queries)
9 Correct 0 ms 208 KB OK (6 queries)
10 Correct 0 ms 208 KB OK (5 queries)
11 Correct 0 ms 208 KB OK (5 queries)
12 Correct 1 ms 208 KB OK (6 queries)
13 Correct 1 ms 208 KB OK (7 queries)
14 Correct 0 ms 208 KB OK (7 queries)
15 Correct 0 ms 208 KB OK (7 queries)
16 Correct 0 ms 208 KB OK (7 queries)
17 Correct 1 ms 208 KB OK (6 queries)
18 Correct 0 ms 208 KB OK (6 queries)
19 Correct 0 ms 208 KB OK (6 queries)
20 Correct 0 ms 208 KB OK (7 queries)
21 Correct 0 ms 208 KB OK (7 queries)
22 Correct 0 ms 208 KB OK (2 queries)
23 Correct 0 ms 208 KB OK (2 queries)
24 Correct 0 ms 208 KB OK (3 queries)
25 Correct 0 ms 208 KB OK (3 queries)
26 Correct 0 ms 208 KB OK (2 queries)
27 Correct 0 ms 208 KB OK (3 queries)
28 Correct 0 ms 208 KB OK (3 queries)
29 Correct 0 ms 208 KB OK (3 queries)
30 Correct 0 ms 208 KB OK (3 queries)
31 Correct 0 ms 208 KB OK (3 queries)
32 Correct 0 ms 208 KB OK (3 queries)
33 Correct 0 ms 208 KB OK (3 queries)
34 Correct 0 ms 208 KB OK (4 queries)
35 Correct 0 ms 208 KB OK (4 queries)
36 Correct 1 ms 208 KB OK (3 queries)
37 Correct 0 ms 208 KB OK (4 queries)
38 Correct 0 ms 208 KB OK (4 queries)
39 Correct 0 ms 208 KB OK (3 queries)
40 Correct 0 ms 208 KB OK (4 queries)
41 Correct 0 ms 208 KB OK (4 queries)
42 Correct 0 ms 256 KB OK (3 queries)
43 Correct 0 ms 208 KB OK (4 queries)
44 Correct 0 ms 208 KB OK (4 queries)
45 Correct 0 ms 208 KB OK (7 queries)
46 Correct 1 ms 208 KB OK (7 queries)
47 Correct 0 ms 208 KB OK (4 queries)
48 Correct 1 ms 208 KB OK (4 queries)
49 Correct 0 ms 208 KB OK (4 queries)
50 Correct 0 ms 208 KB OK (4 queries)
51 Correct 0 ms 208 KB OK (4 queries)
52 Correct 0 ms 208 KB OK (4 queries)
53 Correct 0 ms 208 KB OK (4 queries)
54 Correct 0 ms 208 KB OK (4 queries)
55 Correct 0 ms 208 KB OK (4 queries)
56 Correct 0 ms 208 KB OK (4 queries)
57 Correct 0 ms 208 KB OK (5 queries)
58 Correct 0 ms 208 KB OK (5 queries)
59 Execution timed out 3057 ms 208 KB Time limit exceeded
60 Halted 0 ms 0 KB -

Subtask #4
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB OK (7 queries)
2 Correct 0 ms 208 KB OK (7 queries)
3 Correct 1 ms 208 KB OK (5 queries)
4 Correct 0 ms 208 KB OK (6 queries)
5 Correct 0 ms 208 KB OK (5 queries)
6 Correct 1 ms 208 KB OK (7 queries)
7 Correct 0 ms 208 KB OK (7 queries)
8 Correct 0 ms 208 KB OK (6 queries)
9 Correct 0 ms 208 KB OK (6 queries)
10 Correct 0 ms 208 KB OK (5 queries)
11 Correct 0 ms 208 KB OK (5 queries)
12 Correct 1 ms 208 KB OK (6 queries)
13 Correct 1 ms 208 KB OK (7 queries)
14 Correct 0 ms 208 KB OK (7 queries)
15 Correct 0 ms 208 KB OK (7 queries)
16 Correct 0 ms 208 KB OK (7 queries)
17 Correct 1 ms 208 KB OK (6 queries)
18 Correct 0 ms 208 KB OK (6 queries)
19 Correct 0 ms 208 KB OK (6 queries)
20 Correct 0 ms 208 KB OK (7 queries)
21 Correct 0 ms 208 KB OK (7 queries)
22 Correct 0 ms 208 KB OK (2 queries)
23 Correct 0 ms 208 KB OK (2 queries)
24 Correct 0 ms 208 KB OK (3 queries)
25 Correct 0 ms 208 KB OK (3 queries)
26 Correct 0 ms 208 KB OK (2 queries)
27 Correct 0 ms 208 KB OK (3 queries)
28 Correct 0 ms 208 KB OK (3 queries)
29 Correct 0 ms 208 KB OK (3 queries)
30 Correct 0 ms 208 KB OK (3 queries)
31 Correct 0 ms 208 KB OK (3 queries)
32 Correct 0 ms 208 KB OK (3 queries)
33 Correct 0 ms 208 KB OK (3 queries)
34 Correct 0 ms 208 KB OK (4 queries)
35 Correct 0 ms 208 KB OK (4 queries)
36 Correct 1 ms 208 KB OK (3 queries)
37 Correct 0 ms 208 KB OK (4 queries)
38 Correct 0 ms 208 KB OK (4 queries)
39 Correct 0 ms 208 KB OK (3 queries)
40 Correct 0 ms 208 KB OK (4 queries)
41 Correct 0 ms 208 KB OK (4 queries)
42 Correct 0 ms 256 KB OK (3 queries)
43 Correct 0 ms 208 KB OK (4 queries)
44 Correct 0 ms 208 KB OK (4 queries)
45 Correct 0 ms 208 KB OK (7 queries)
46 Correct 1 ms 208 KB OK (7 queries)
47 Correct 0 ms 208 KB OK (4 queries)
48 Correct 1 ms 208 KB OK (4 queries)
49 Correct 0 ms 208 KB OK (4 queries)
50 Correct 0 ms 208 KB OK (4 queries)
51 Correct 0 ms 208 KB OK (4 queries)
52 Correct 0 ms 208 KB OK (4 queries)
53 Correct 0 ms 208 KB OK (4 queries)
54 Correct 0 ms 208 KB OK (4 queries)
55 Correct 0 ms 208 KB OK (4 queries)
56 Correct 0 ms 208 KB OK (4 queries)
57 Correct 0 ms 208 KB OK (5 queries)
58 Correct 0 ms 208 KB OK (5 queries)
59 Execution timed out 3057 ms 208 KB Time limit exceeded
60 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB OK (7 queries)
2 Correct 0 ms 208 KB OK (7 queries)
3 Correct 1 ms 208 KB OK (5 queries)
4 Correct 0 ms 208 KB OK (6 queries)
5 Correct 0 ms 208 KB OK (5 queries)
6 Correct 1 ms 208 KB OK (7 queries)
7 Correct 0 ms 208 KB OK (7 queries)
8 Correct 0 ms 208 KB OK (6 queries)
9 Correct 0 ms 208 KB OK (6 queries)
10 Correct 0 ms 208 KB OK (5 queries)
11 Correct 0 ms 208 KB OK (5 queries)
12 Correct 1 ms 208 KB OK (6 queries)
13 Correct 1 ms 208 KB OK (7 queries)
14 Correct 0 ms 208 KB OK (7 queries)
15 Correct 0 ms 208 KB OK (7 queries)
16 Correct 0 ms 208 KB OK (7 queries)
17 Correct 1 ms 208 KB OK (6 queries)
18 Correct 0 ms 208 KB OK (6 queries)
19 Correct 0 ms 208 KB OK (6 queries)
20 Correct 0 ms 208 KB OK (7 queries)
21 Correct 0 ms 208 KB OK (7 queries)
22 Correct 0 ms 208 KB OK (2 queries)
23 Correct 0 ms 208 KB OK (2 queries)
24 Correct 0 ms 208 KB OK (3 queries)
25 Correct 0 ms 208 KB OK (3 queries)
26 Correct 0 ms 208 KB OK (2 queries)
27 Correct 0 ms 208 KB OK (3 queries)
28 Correct 0 ms 208 KB OK (3 queries)
29 Correct 0 ms 208 KB OK (3 queries)
30 Correct 0 ms 208 KB OK (3 queries)
31 Correct 0 ms 208 KB OK (3 queries)
32 Correct 0 ms 208 KB OK (3 queries)
33 Correct 0 ms 208 KB OK (3 queries)
34 Correct 0 ms 208 KB OK (4 queries)
35 Correct 0 ms 208 KB OK (4 queries)
36 Correct 1 ms 208 KB OK (3 queries)
37 Correct 0 ms 208 KB OK (4 queries)
38 Correct 0 ms 208 KB OK (4 queries)
39 Correct 0 ms 208 KB OK (3 queries)
40 Correct 0 ms 208 KB OK (4 queries)
41 Correct 0 ms 208 KB OK (4 queries)
42 Correct 0 ms 256 KB OK (3 queries)
43 Correct 0 ms 208 KB OK (4 queries)
44 Correct 0 ms 208 KB OK (4 queries)
45 Correct 0 ms 208 KB OK (7 queries)
46 Correct 1 ms 208 KB OK (7 queries)
47 Correct 0 ms 208 KB OK (4 queries)
48 Correct 1 ms 208 KB OK (4 queries)
49 Correct 0 ms 208 KB OK (4 queries)
50 Correct 0 ms 208 KB OK (4 queries)
51 Correct 0 ms 208 KB OK (4 queries)
52 Correct 0 ms 208 KB OK (4 queries)
53 Correct 0 ms 208 KB OK (4 queries)
54 Correct 0 ms 208 KB OK (4 queries)
55 Correct 0 ms 208 KB OK (4 queries)
56 Correct 0 ms 208 KB OK (4 queries)
57 Correct 0 ms 208 KB OK (5 queries)
58 Correct 0 ms 208 KB OK (5 queries)
59 Execution timed out 3057 ms 208 KB Time limit exceeded
60 Halted 0 ms 0 KB -