Submission #575467

# Submission time Handle Problem Language Result Execution time Memory
575467 2022-06-10T16:36:31 Z _karan_gandhi Colors (BOI20_colors) C++17
9 / 100
2 ms 336 KB
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define all(v) v.begin(), v.end()
#define endl '\n'
#define pl(var) " [" << #var << ": " << (var) << "] "

template<typename A, typename B> ostream& operator<<(ostream &cout, pair<A, B> const &p) { return cout << "[" << p.first << ", " << p.second << "]"; }
template<typename A> ostream& operator<<(ostream &cout, vector<A> const &v) { cout << "["; for(int i = 0; i < (int)v.size(); i++) {if (i) cout << ", "; cout << v[i];} return cout << "]";}

ll int n;

void solve() {
	cin >> n;

	assert(n <= 64);

	cout << "? 1" << endl;
	cout.flush();
	int s; cin >> s;

	int hi = n, lo = 2;
	int prev = 1;

	for (int i = 0; i < n - 1; i++) {
		if (i % 2 == 0) {
			cout << "? " << hi-- << endl;
			cout.flush();
			cin >> s;

			if (i == 0 && !s) {
				cout << "= " << n << endl;
				return;
			}

			if (!s) {
				cout << "= " << (abs(prev - (hi + 2))) << endl;
				return;
			}
			prev = hi + 1;
		} else {
			cout << "? " << lo++ << endl;
			cout.flush();
			cin >> s;

			if (!s) {
				cout << "= " << (abs(prev - (lo - 2))) << endl;
				return;
			}
			prev = lo - 1;
		}
	}

	// assert(0);
	cout << "= 1" << endl;
}

int main() {
	// ios::sync_with_stdio(false);
	// cin.tie(nullptr);

	int T = 1;
	// cin >> T;
	while (T--) 
		solve();

	return 0;
}
# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB OK (5 queries)
2 Correct 1 ms 208 KB OK (6 queries)
3 Correct 1 ms 208 KB OK (10 queries)
4 Correct 1 ms 208 KB OK (26 queries)
5 Correct 1 ms 208 KB OK (13 queries)
6 Correct 1 ms 208 KB OK (26 queries)
7 Correct 1 ms 208 KB OK (17 queries)
8 Correct 1 ms 208 KB OK (7 queries)
9 Correct 0 ms 208 KB OK (9 queries)
10 Correct 1 ms 208 KB OK (11 queries)
11 Correct 0 ms 208 KB OK (4 queries)
12 Correct 1 ms 208 KB OK (5 queries)
13 Correct 1 ms 208 KB OK (11 queries)
14 Correct 1 ms 208 KB OK (16 queries)
15 Correct 1 ms 208 KB OK (11 queries)
16 Correct 2 ms 208 KB OK (34 queries)
17 Correct 1 ms 208 KB OK (2 queries)
18 Correct 1 ms 208 KB OK (16 queries)
19 Correct 1 ms 208 KB OK (3 queries)
20 Correct 1 ms 208 KB OK (31 queries)
21 Correct 1 ms 208 KB OK (9 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 (2 queries)
25 Correct 0 ms 208 KB OK (3 queries)
26 Correct 1 ms 208 KB OK (3 queries)
27 Correct 0 ms 208 KB OK (2 queries)
28 Correct 0 ms 208 KB OK (3 queries)
29 Correct 0 ms 208 KB OK (4 queries)
30 Correct 0 ms 208 KB OK (4 queries)
31 Correct 1 ms 208 KB OK (2 queries)
32 Correct 1 ms 208 KB OK (3 queries)
33 Correct 0 ms 208 KB OK (4 queries)
34 Correct 1 ms 208 KB OK (5 queries)
35 Correct 0 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 1 ms 208 KB OK (6 queries)
41 Correct 1 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 1 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 1 ms 208 KB OK (6 queries)
54 Correct 1 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 0 ms 208 KB OK (2 queries)
59 Correct 0 ms 208 KB OK (3 queries)
60 Correct 0 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 208 KB OK (63 queries)
64 Correct 0 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 0 ms 208 KB OK (61 queries)
68 Correct 1 ms 208 KB OK (5 queries)
69 Correct 1 ms 208 KB OK (60 queries)
70 Correct 0 ms 208 KB OK (6 queries)
# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB OK (5 queries)
2 Correct 1 ms 208 KB OK (6 queries)
3 Correct 1 ms 208 KB OK (10 queries)
4 Correct 1 ms 208 KB OK (26 queries)
5 Correct 1 ms 208 KB OK (13 queries)
6 Correct 1 ms 208 KB OK (26 queries)
7 Correct 1 ms 208 KB OK (17 queries)
8 Correct 1 ms 208 KB OK (7 queries)
9 Correct 0 ms 208 KB OK (9 queries)
10 Correct 1 ms 208 KB OK (11 queries)
11 Correct 0 ms 208 KB OK (4 queries)
12 Correct 1 ms 208 KB OK (5 queries)
13 Correct 1 ms 208 KB OK (11 queries)
14 Correct 1 ms 208 KB OK (16 queries)
15 Correct 1 ms 208 KB OK (11 queries)
16 Correct 2 ms 208 KB OK (34 queries)
17 Correct 1 ms 208 KB OK (2 queries)
18 Correct 1 ms 208 KB OK (16 queries)
19 Correct 1 ms 208 KB OK (3 queries)
20 Correct 1 ms 208 KB OK (31 queries)
21 Correct 1 ms 208 KB OK (9 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 (2 queries)
25 Correct 0 ms 208 KB OK (3 queries)
26 Correct 1 ms 208 KB OK (3 queries)
27 Correct 0 ms 208 KB OK (2 queries)
28 Correct 0 ms 208 KB OK (3 queries)
29 Correct 0 ms 208 KB OK (4 queries)
30 Correct 0 ms 208 KB OK (4 queries)
31 Correct 1 ms 208 KB OK (2 queries)
32 Correct 1 ms 208 KB OK (3 queries)
33 Correct 0 ms 208 KB OK (4 queries)
34 Correct 1 ms 208 KB OK (5 queries)
35 Correct 0 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 1 ms 208 KB OK (6 queries)
41 Correct 1 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 1 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 1 ms 208 KB OK (6 queries)
54 Correct 1 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 0 ms 208 KB OK (2 queries)
59 Correct 0 ms 208 KB OK (3 queries)
60 Correct 0 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 208 KB OK (63 queries)
64 Correct 0 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 0 ms 208 KB OK (61 queries)
68 Correct 1 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 Runtime error 1 ms 336 KB Execution killed with signal 6
72 Halted 0 ms 0 KB -
# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB OK (5 queries)
2 Correct 1 ms 208 KB OK (6 queries)
3 Correct 1 ms 208 KB OK (10 queries)
4 Correct 1 ms 208 KB OK (26 queries)
5 Correct 1 ms 208 KB OK (13 queries)
6 Correct 1 ms 208 KB OK (26 queries)
7 Correct 1 ms 208 KB OK (17 queries)
8 Correct 1 ms 208 KB OK (7 queries)
9 Correct 0 ms 208 KB OK (9 queries)
10 Correct 1 ms 208 KB OK (11 queries)
11 Correct 0 ms 208 KB OK (4 queries)
12 Correct 1 ms 208 KB OK (5 queries)
13 Correct 1 ms 208 KB OK (11 queries)
14 Correct 1 ms 208 KB OK (16 queries)
15 Correct 1 ms 208 KB OK (11 queries)
16 Correct 2 ms 208 KB OK (34 queries)
17 Correct 1 ms 208 KB OK (2 queries)
18 Correct 1 ms 208 KB OK (16 queries)
19 Correct 1 ms 208 KB OK (3 queries)
20 Correct 1 ms 208 KB OK (31 queries)
21 Correct 1 ms 208 KB OK (9 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 (2 queries)
25 Correct 0 ms 208 KB OK (3 queries)
26 Correct 1 ms 208 KB OK (3 queries)
27 Correct 0 ms 208 KB OK (2 queries)
28 Correct 0 ms 208 KB OK (3 queries)
29 Correct 0 ms 208 KB OK (4 queries)
30 Correct 0 ms 208 KB OK (4 queries)
31 Correct 1 ms 208 KB OK (2 queries)
32 Correct 1 ms 208 KB OK (3 queries)
33 Correct 0 ms 208 KB OK (4 queries)
34 Correct 1 ms 208 KB OK (5 queries)
35 Correct 0 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 1 ms 208 KB OK (6 queries)
41 Correct 1 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 1 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 1 ms 208 KB OK (6 queries)
54 Correct 1 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 0 ms 208 KB OK (2 queries)
59 Correct 0 ms 208 KB OK (3 queries)
60 Correct 0 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 208 KB OK (63 queries)
64 Correct 0 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 0 ms 208 KB OK (61 queries)
68 Correct 1 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 Runtime error 1 ms 336 KB Execution killed with signal 6
72 Halted 0 ms 0 KB -
# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB OK (5 queries)
2 Correct 1 ms 208 KB OK (6 queries)
3 Correct 1 ms 208 KB OK (10 queries)
4 Correct 1 ms 208 KB OK (26 queries)
5 Correct 1 ms 208 KB OK (13 queries)
6 Correct 1 ms 208 KB OK (26 queries)
7 Correct 1 ms 208 KB OK (17 queries)
8 Correct 1 ms 208 KB OK (7 queries)
9 Correct 0 ms 208 KB OK (9 queries)
10 Correct 1 ms 208 KB OK (11 queries)
11 Correct 0 ms 208 KB OK (4 queries)
12 Correct 1 ms 208 KB OK (5 queries)
13 Correct 1 ms 208 KB OK (11 queries)
14 Correct 1 ms 208 KB OK (16 queries)
15 Correct 1 ms 208 KB OK (11 queries)
16 Correct 2 ms 208 KB OK (34 queries)
17 Correct 1 ms 208 KB OK (2 queries)
18 Correct 1 ms 208 KB OK (16 queries)
19 Correct 1 ms 208 KB OK (3 queries)
20 Correct 1 ms 208 KB OK (31 queries)
21 Correct 1 ms 208 KB OK (9 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 (2 queries)
25 Correct 0 ms 208 KB OK (3 queries)
26 Correct 1 ms 208 KB OK (3 queries)
27 Correct 0 ms 208 KB OK (2 queries)
28 Correct 0 ms 208 KB OK (3 queries)
29 Correct 0 ms 208 KB OK (4 queries)
30 Correct 0 ms 208 KB OK (4 queries)
31 Correct 1 ms 208 KB OK (2 queries)
32 Correct 1 ms 208 KB OK (3 queries)
33 Correct 0 ms 208 KB OK (4 queries)
34 Correct 1 ms 208 KB OK (5 queries)
35 Correct 0 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 1 ms 208 KB OK (6 queries)
41 Correct 1 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 1 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 1 ms 208 KB OK (6 queries)
54 Correct 1 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 0 ms 208 KB OK (2 queries)
59 Correct 0 ms 208 KB OK (3 queries)
60 Correct 0 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 208 KB OK (63 queries)
64 Correct 0 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 0 ms 208 KB OK (61 queries)
68 Correct 1 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 Runtime error 1 ms 336 KB Execution killed with signal 6
72 Halted 0 ms 0 KB -
# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB OK (5 queries)
2 Correct 1 ms 208 KB OK (6 queries)
3 Correct 1 ms 208 KB OK (10 queries)
4 Correct 1 ms 208 KB OK (26 queries)
5 Correct 1 ms 208 KB OK (13 queries)
6 Correct 1 ms 208 KB OK (26 queries)
7 Correct 1 ms 208 KB OK (17 queries)
8 Correct 1 ms 208 KB OK (7 queries)
9 Correct 0 ms 208 KB OK (9 queries)
10 Correct 1 ms 208 KB OK (11 queries)
11 Correct 0 ms 208 KB OK (4 queries)
12 Correct 1 ms 208 KB OK (5 queries)
13 Correct 1 ms 208 KB OK (11 queries)
14 Correct 1 ms 208 KB OK (16 queries)
15 Correct 1 ms 208 KB OK (11 queries)
16 Correct 2 ms 208 KB OK (34 queries)
17 Correct 1 ms 208 KB OK (2 queries)
18 Correct 1 ms 208 KB OK (16 queries)
19 Correct 1 ms 208 KB OK (3 queries)
20 Correct 1 ms 208 KB OK (31 queries)
21 Correct 1 ms 208 KB OK (9 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 (2 queries)
25 Correct 0 ms 208 KB OK (3 queries)
26 Correct 1 ms 208 KB OK (3 queries)
27 Correct 0 ms 208 KB OK (2 queries)
28 Correct 0 ms 208 KB OK (3 queries)
29 Correct 0 ms 208 KB OK (4 queries)
30 Correct 0 ms 208 KB OK (4 queries)
31 Correct 1 ms 208 KB OK (2 queries)
32 Correct 1 ms 208 KB OK (3 queries)
33 Correct 0 ms 208 KB OK (4 queries)
34 Correct 1 ms 208 KB OK (5 queries)
35 Correct 0 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 1 ms 208 KB OK (6 queries)
41 Correct 1 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 1 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 1 ms 208 KB OK (6 queries)
54 Correct 1 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 0 ms 208 KB OK (2 queries)
59 Correct 0 ms 208 KB OK (3 queries)
60 Correct 0 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 208 KB OK (63 queries)
64 Correct 0 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 0 ms 208 KB OK (61 queries)
68 Correct 1 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 Runtime error 1 ms 336 KB Execution killed with signal 6
72 Halted 0 ms 0 KB -