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답안 #394313

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
394313 2021-04-26T11:51:39 Z KoD Colors (BOI20_colors) C++17
9 / 100
 3 ms 316 KB 
#include <bits/stdc++.h>

using ll = long long;

bool ask(const ll x) {
    std::cout << "? " << x << std::endl;
    bool f;
    std::cin >> f;
    return f;
}

int main() {
    ll N;
    std::cin >> N;
    ll len = N - 1;
    ll pos = 1, dir = 1;
    ask(pos);
    while (len > 0) {
        pos += len * dir;
        dir = -dir;
        if (!ask(pos)) {
            std::cout << "= " << len + 1 << std::endl;
            return 0;
        }
        len -= 1;
    }
    std::cout << "= " << 1 << std::endl;
    // assert(N <= 125);
    // if (N == 2) {
    //     ask(1);
    //     const auto ans = (ask(2) ? 1 : 2);
    //     std::cout << "= " << ans << std::endl;
    //     return 0;
    // }
    // ll half = (N - 1) / 2;
    // ll other = (N - 1) - half;
    // ll pos = 1 + (other + 1) / 2;
    // ask(pos);
    // pos += half;
    // if (ask(pos)) {
    //     ll len = half;
    //     ll dir = -1;
    //     while (--len > 0) {
    //         pos += dir * len;
    //         dir *= -1;
    //         if (!ask(pos)) {
    //             break;
    //         }
    //     }
    //     std::cout << "= " << len + 1 << std::endl;
    // }
    // else {
    //     ll len = half;
    //     ll dir = -1;
    //     while (++len < N) {
    //         pos += dir * len;
    //         dir *= -1;
    //         if (ask(pos)) {
    //             break;
    //         }
    //     }
    //     std::cout << "= " << len << std::endl;
    // }
    return 0;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 200 KB OK (5 queries)
2 Correct 1 ms 204 KB OK (6 queries)
3 Correct 1 ms 200 KB OK (10 queries)
4 Correct 1 ms 200 KB OK (26 queries)
5 Correct 1 ms 200 KB OK (13 queries)
6 Correct 1 ms 316 KB OK (26 queries)
7 Correct 1 ms 200 KB OK (17 queries)
8 Correct 1 ms 200 KB OK (7 queries)
9 Correct 1 ms 200 KB OK (9 queries)
10 Correct 1 ms 200 KB OK (11 queries)
11 Correct 1 ms 200 KB OK (4 queries)
12 Correct 1 ms 200 KB OK (5 queries)
13 Correct 1 ms 200 KB OK (11 queries)
14 Correct 1 ms 200 KB OK (16 queries)
15 Correct 1 ms 200 KB OK (11 queries)
16 Correct 1 ms 204 KB OK (34 queries)
17 Correct 1 ms 200 KB OK (2 queries)
18 Correct 1 ms 200 KB OK (16 queries)
19 Correct 1 ms 200 KB OK (3 queries)
20 Correct 1 ms 200 KB OK (31 queries)
21 Correct 1 ms 200 KB OK (9 queries)
22 Correct 1 ms 200 KB OK (2 queries)
23 Correct 1 ms 200 KB OK (2 queries)
24 Correct 1 ms 204 KB OK (2 queries)
25 Correct 1 ms 204 KB OK (3 queries)
26 Correct 1 ms 200 KB OK (3 queries)
27 Correct 1 ms 200 KB OK (2 queries)
28 Correct 1 ms 200 KB OK (3 queries)
29 Correct 1 ms 200 KB OK (4 queries)
30 Correct 1 ms 200 KB OK (4 queries)
31 Correct 1 ms 200 KB OK (2 queries)
32 Correct 1 ms 200 KB OK (3 queries)
33 Correct 3 ms 200 KB OK (4 queries)
34 Correct 1 ms 200 KB OK (5 queries)
35 Correct 1 ms 200 KB OK (5 queries)
36 Correct 1 ms 200 KB OK (2 queries)
37 Correct 1 ms 200 KB OK (3 queries)
38 Correct 1 ms 200 KB OK (4 queries)
39 Correct 1 ms 200 KB OK (5 queries)
40 Correct 1 ms 200 KB OK (6 queries)
41 Correct 1 ms 200 KB OK (6 queries)
42 Correct 1 ms 200 KB OK (2 queries)
43 Correct 1 ms 200 KB OK (3 queries)
44 Correct 1 ms 200 KB OK (4 queries)
45 Correct 1 ms 200 KB OK (5 queries)
46 Correct 1 ms 200 KB OK (6 queries)
47 Correct 1 ms 200 KB OK (7 queries)
48 Correct 1 ms 200 KB OK (7 queries)
49 Correct 1 ms 200 KB OK (2 queries)
50 Correct 1 ms 200 KB OK (3 queries)
51 Correct 1 ms 200 KB OK (4 queries)
52 Correct 1 ms 200 KB OK (5 queries)
53 Correct 1 ms 200 KB OK (6 queries)
54 Correct 1 ms 200 KB OK (7 queries)
55 Correct 1 ms 204 KB OK (8 queries)
56 Correct 1 ms 200 KB OK (8 queries)
57 Correct 1 ms 200 KB OK (3 queries)
58 Correct 1 ms 200 KB OK (2 queries)
59 Correct 1 ms 204 KB OK (3 queries)
60 Correct 1 ms 200 KB OK (2 queries)
61 Correct 1 ms 200 KB OK (63 queries)
62 Correct 1 ms 204 KB OK (2 queries)
63 Correct 1 ms 200 KB OK (63 queries)
64 Correct 1 ms 200 KB OK (3 queries)
65 Correct 1 ms 200 KB OK (62 queries)
66 Correct 1 ms 200 KB OK (4 queries)
67 Correct 1 ms 200 KB OK (61 queries)
68 Correct 1 ms 200 KB OK (5 queries)
69 Correct 1 ms 200 KB OK (60 queries)
70 Correct 1 ms 200 KB OK (6 queries)

Subtask #2
0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 200 KB OK (5 queries)
2 Correct 1 ms 204 KB OK (6 queries)
3 Correct 1 ms 200 KB OK (10 queries)
4 Correct 1 ms 200 KB OK (26 queries)
5 Correct 1 ms 200 KB OK (13 queries)
6 Correct 1 ms 316 KB OK (26 queries)
7 Correct 1 ms 200 KB OK (17 queries)
8 Correct 1 ms 200 KB OK (7 queries)
9 Correct 1 ms 200 KB OK (9 queries)
10 Correct 1 ms 200 KB OK (11 queries)
11 Correct 1 ms 200 KB OK (4 queries)
12 Correct 1 ms 200 KB OK (5 queries)
13 Correct 1 ms 200 KB OK (11 queries)
14 Correct 1 ms 200 KB OK (16 queries)
15 Correct 1 ms 200 KB OK (11 queries)
16 Correct 1 ms 204 KB OK (34 queries)
17 Correct 1 ms 200 KB OK (2 queries)
18 Correct 1 ms 200 KB OK (16 queries)
19 Correct 1 ms 200 KB OK (3 queries)
20 Correct 1 ms 200 KB OK (31 queries)
21 Correct 1 ms 200 KB OK (9 queries)
22 Correct 1 ms 200 KB OK (2 queries)
23 Correct 1 ms 200 KB OK (2 queries)
24 Correct 1 ms 204 KB OK (2 queries)
25 Correct 1 ms 204 KB OK (3 queries)
26 Correct 1 ms 200 KB OK (3 queries)
27 Correct 1 ms 200 KB OK (2 queries)
28 Correct 1 ms 200 KB OK (3 queries)
29 Correct 1 ms 200 KB OK (4 queries)
30 Correct 1 ms 200 KB OK (4 queries)
31 Correct 1 ms 200 KB OK (2 queries)
32 Correct 1 ms 200 KB OK (3 queries)
33 Correct 3 ms 200 KB OK (4 queries)
34 Correct 1 ms 200 KB OK (5 queries)
35 Correct 1 ms 200 KB OK (5 queries)
36 Correct 1 ms 200 KB OK (2 queries)
37 Correct 1 ms 200 KB OK (3 queries)
38 Correct 1 ms 200 KB OK (4 queries)
39 Correct 1 ms 200 KB OK (5 queries)
40 Correct 1 ms 200 KB OK (6 queries)
41 Correct 1 ms 200 KB OK (6 queries)
42 Correct 1 ms 200 KB OK (2 queries)
43 Correct 1 ms 200 KB OK (3 queries)
44 Correct 1 ms 200 KB OK (4 queries)
45 Correct 1 ms 200 KB OK (5 queries)
46 Correct 1 ms 200 KB OK (6 queries)
47 Correct 1 ms 200 KB OK (7 queries)
48 Correct 1 ms 200 KB OK (7 queries)
49 Correct 1 ms 200 KB OK (2 queries)
50 Correct 1 ms 200 KB OK (3 queries)
51 Correct 1 ms 200 KB OK (4 queries)
52 Correct 1 ms 200 KB OK (5 queries)
53 Correct 1 ms 200 KB OK (6 queries)
54 Correct 1 ms 200 KB OK (7 queries)
55 Correct 1 ms 204 KB OK (8 queries)
56 Correct 1 ms 200 KB OK (8 queries)
57 Correct 1 ms 200 KB OK (3 queries)
58 Correct 1 ms 200 KB OK (2 queries)
59 Correct 1 ms 204 KB OK (3 queries)
60 Correct 1 ms 200 KB OK (2 queries)
61 Correct 1 ms 200 KB OK (63 queries)
62 Correct 1 ms 204 KB OK (2 queries)
63 Correct 1 ms 200 KB OK (63 queries)
64 Correct 1 ms 200 KB OK (3 queries)
65 Correct 1 ms 200 KB OK (62 queries)
66 Correct 1 ms 200 KB OK (4 queries)
67 Correct 1 ms 200 KB OK (61 queries)
68 Correct 1 ms 200 KB OK (5 queries)
69 Correct 1 ms 200 KB OK (60 queries)
70 Correct 1 ms 200 KB OK (6 queries)
71 Incorrect 2 ms 200 KB Query limit exceeded
72 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 200 KB OK (5 queries)
2 Correct 1 ms 204 KB OK (6 queries)
3 Correct 1 ms 200 KB OK (10 queries)
4 Correct 1 ms 200 KB OK (26 queries)
5 Correct 1 ms 200 KB OK (13 queries)
6 Correct 1 ms 316 KB OK (26 queries)
7 Correct 1 ms 200 KB OK (17 queries)
8 Correct 1 ms 200 KB OK (7 queries)
9 Correct 1 ms 200 KB OK (9 queries)
10 Correct 1 ms 200 KB OK (11 queries)
11 Correct 1 ms 200 KB OK (4 queries)
12 Correct 1 ms 200 KB OK (5 queries)
13 Correct 1 ms 200 KB OK (11 queries)
14 Correct 1 ms 200 KB OK (16 queries)
15 Correct 1 ms 200 KB OK (11 queries)
16 Correct 1 ms 204 KB OK (34 queries)
17 Correct 1 ms 200 KB OK (2 queries)
18 Correct 1 ms 200 KB OK (16 queries)
19 Correct 1 ms 200 KB OK (3 queries)
20 Correct 1 ms 200 KB OK (31 queries)
21 Correct 1 ms 200 KB OK (9 queries)
22 Correct 1 ms 200 KB OK (2 queries)
23 Correct 1 ms 200 KB OK (2 queries)
24 Correct 1 ms 204 KB OK (2 queries)
25 Correct 1 ms 204 KB OK (3 queries)
26 Correct 1 ms 200 KB OK (3 queries)
27 Correct 1 ms 200 KB OK (2 queries)
28 Correct 1 ms 200 KB OK (3 queries)
29 Correct 1 ms 200 KB OK (4 queries)
30 Correct 1 ms 200 KB OK (4 queries)
31 Correct 1 ms 200 KB OK (2 queries)
32 Correct 1 ms 200 KB OK (3 queries)
33 Correct 3 ms 200 KB OK (4 queries)
34 Correct 1 ms 200 KB OK (5 queries)
35 Correct 1 ms 200 KB OK (5 queries)
36 Correct 1 ms 200 KB OK (2 queries)
37 Correct 1 ms 200 KB OK (3 queries)
38 Correct 1 ms 200 KB OK (4 queries)
39 Correct 1 ms 200 KB OK (5 queries)
40 Correct 1 ms 200 KB OK (6 queries)
41 Correct 1 ms 200 KB OK (6 queries)
42 Correct 1 ms 200 KB OK (2 queries)
43 Correct 1 ms 200 KB OK (3 queries)
44 Correct 1 ms 200 KB OK (4 queries)
45 Correct 1 ms 200 KB OK (5 queries)
46 Correct 1 ms 200 KB OK (6 queries)
47 Correct 1 ms 200 KB OK (7 queries)
48 Correct 1 ms 200 KB OK (7 queries)
49 Correct 1 ms 200 KB OK (2 queries)
50 Correct 1 ms 200 KB OK (3 queries)
51 Correct 1 ms 200 KB OK (4 queries)
52 Correct 1 ms 200 KB OK (5 queries)
53 Correct 1 ms 200 KB OK (6 queries)
54 Correct 1 ms 200 KB OK (7 queries)
55 Correct 1 ms 204 KB OK (8 queries)
56 Correct 1 ms 200 KB OK (8 queries)
57 Correct 1 ms 200 KB OK (3 queries)
58 Correct 1 ms 200 KB OK (2 queries)
59 Correct 1 ms 204 KB OK (3 queries)
60 Correct 1 ms 200 KB OK (2 queries)
61 Correct 1 ms 200 KB OK (63 queries)
62 Correct 1 ms 204 KB OK (2 queries)
63 Correct 1 ms 200 KB OK (63 queries)
64 Correct 1 ms 200 KB OK (3 queries)
65 Correct 1 ms 200 KB OK (62 queries)
66 Correct 1 ms 200 KB OK (4 queries)
67 Correct 1 ms 200 KB OK (61 queries)
68 Correct 1 ms 200 KB OK (5 queries)
69 Correct 1 ms 200 KB OK (60 queries)
70 Correct 1 ms 200 KB OK (6 queries)
71 Incorrect 2 ms 200 KB Query limit exceeded
72 Halted 0 ms 0 KB -

Subtask #4
0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 200 KB OK (5 queries)
2 Correct 1 ms 204 KB OK (6 queries)
3 Correct 1 ms 200 KB OK (10 queries)
4 Correct 1 ms 200 KB OK (26 queries)
5 Correct 1 ms 200 KB OK (13 queries)
6 Correct 1 ms 316 KB OK (26 queries)
7 Correct 1 ms 200 KB OK (17 queries)
8 Correct 1 ms 200 KB OK (7 queries)
9 Correct 1 ms 200 KB OK (9 queries)
10 Correct 1 ms 200 KB OK (11 queries)
11 Correct 1 ms 200 KB OK (4 queries)
12 Correct 1 ms 200 KB OK (5 queries)
13 Correct 1 ms 200 KB OK (11 queries)
14 Correct 1 ms 200 KB OK (16 queries)
15 Correct 1 ms 200 KB OK (11 queries)
16 Correct 1 ms 204 KB OK (34 queries)
17 Correct 1 ms 200 KB OK (2 queries)
18 Correct 1 ms 200 KB OK (16 queries)
19 Correct 1 ms 200 KB OK (3 queries)
20 Correct 1 ms 200 KB OK (31 queries)
21 Correct 1 ms 200 KB OK (9 queries)
22 Correct 1 ms 200 KB OK (2 queries)
23 Correct 1 ms 200 KB OK (2 queries)
24 Correct 1 ms 204 KB OK (2 queries)
25 Correct 1 ms 204 KB OK (3 queries)
26 Correct 1 ms 200 KB OK (3 queries)
27 Correct 1 ms 200 KB OK (2 queries)
28 Correct 1 ms 200 KB OK (3 queries)
29 Correct 1 ms 200 KB OK (4 queries)
30 Correct 1 ms 200 KB OK (4 queries)
31 Correct 1 ms 200 KB OK (2 queries)
32 Correct 1 ms 200 KB OK (3 queries)
33 Correct 3 ms 200 KB OK (4 queries)
34 Correct 1 ms 200 KB OK (5 queries)
35 Correct 1 ms 200 KB OK (5 queries)
36 Correct 1 ms 200 KB OK (2 queries)
37 Correct 1 ms 200 KB OK (3 queries)
38 Correct 1 ms 200 KB OK (4 queries)
39 Correct 1 ms 200 KB OK (5 queries)
40 Correct 1 ms 200 KB OK (6 queries)
41 Correct 1 ms 200 KB OK (6 queries)
42 Correct 1 ms 200 KB OK (2 queries)
43 Correct 1 ms 200 KB OK (3 queries)
44 Correct 1 ms 200 KB OK (4 queries)
45 Correct 1 ms 200 KB OK (5 queries)
46 Correct 1 ms 200 KB OK (6 queries)
47 Correct 1 ms 200 KB OK (7 queries)
48 Correct 1 ms 200 KB OK (7 queries)
49 Correct 1 ms 200 KB OK (2 queries)
50 Correct 1 ms 200 KB OK (3 queries)
51 Correct 1 ms 200 KB OK (4 queries)
52 Correct 1 ms 200 KB OK (5 queries)
53 Correct 1 ms 200 KB OK (6 queries)
54 Correct 1 ms 200 KB OK (7 queries)
55 Correct 1 ms 204 KB OK (8 queries)
56 Correct 1 ms 200 KB OK (8 queries)
57 Correct 1 ms 200 KB OK (3 queries)
58 Correct 1 ms 200 KB OK (2 queries)
59 Correct 1 ms 204 KB OK (3 queries)
60 Correct 1 ms 200 KB OK (2 queries)
61 Correct 1 ms 200 KB OK (63 queries)
62 Correct 1 ms 204 KB OK (2 queries)
63 Correct 1 ms 200 KB OK (63 queries)
64 Correct 1 ms 200 KB OK (3 queries)
65 Correct 1 ms 200 KB OK (62 queries)
66 Correct 1 ms 200 KB OK (4 queries)
67 Correct 1 ms 200 KB OK (61 queries)
68 Correct 1 ms 200 KB OK (5 queries)
69 Correct 1 ms 200 KB OK (60 queries)
70 Correct 1 ms 200 KB OK (6 queries)
71 Incorrect 2 ms 200 KB Query limit exceeded
72 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 200 KB OK (5 queries)
2 Correct 1 ms 204 KB OK (6 queries)
3 Correct 1 ms 200 KB OK (10 queries)
4 Correct 1 ms 200 KB OK (26 queries)
5 Correct 1 ms 200 KB OK (13 queries)
6 Correct 1 ms 316 KB OK (26 queries)
7 Correct 1 ms 200 KB OK (17 queries)
8 Correct 1 ms 200 KB OK (7 queries)
9 Correct 1 ms 200 KB OK (9 queries)
10 Correct 1 ms 200 KB OK (11 queries)
11 Correct 1 ms 200 KB OK (4 queries)
12 Correct 1 ms 200 KB OK (5 queries)
13 Correct 1 ms 200 KB OK (11 queries)
14 Correct 1 ms 200 KB OK (16 queries)
15 Correct 1 ms 200 KB OK (11 queries)
16 Correct 1 ms 204 KB OK (34 queries)
17 Correct 1 ms 200 KB OK (2 queries)
18 Correct 1 ms 200 KB OK (16 queries)
19 Correct 1 ms 200 KB OK (3 queries)
20 Correct 1 ms 200 KB OK (31 queries)
21 Correct 1 ms 200 KB OK (9 queries)
22 Correct 1 ms 200 KB OK (2 queries)
23 Correct 1 ms 200 KB OK (2 queries)
24 Correct 1 ms 204 KB OK (2 queries)
25 Correct 1 ms 204 KB OK (3 queries)
26 Correct 1 ms 200 KB OK (3 queries)
27 Correct 1 ms 200 KB OK (2 queries)
28 Correct 1 ms 200 KB OK (3 queries)
29 Correct 1 ms 200 KB OK (4 queries)
30 Correct 1 ms 200 KB OK (4 queries)
31 Correct 1 ms 200 KB OK (2 queries)
32 Correct 1 ms 200 KB OK (3 queries)
33 Correct 3 ms 200 KB OK (4 queries)
34 Correct 1 ms 200 KB OK (5 queries)
35 Correct 1 ms 200 KB OK (5 queries)
36 Correct 1 ms 200 KB OK (2 queries)
37 Correct 1 ms 200 KB OK (3 queries)
38 Correct 1 ms 200 KB OK (4 queries)
39 Correct 1 ms 200 KB OK (5 queries)
40 Correct 1 ms 200 KB OK (6 queries)
41 Correct 1 ms 200 KB OK (6 queries)
42 Correct 1 ms 200 KB OK (2 queries)
43 Correct 1 ms 200 KB OK (3 queries)
44 Correct 1 ms 200 KB OK (4 queries)
45 Correct 1 ms 200 KB OK (5 queries)
46 Correct 1 ms 200 KB OK (6 queries)
47 Correct 1 ms 200 KB OK (7 queries)
48 Correct 1 ms 200 KB OK (7 queries)
49 Correct 1 ms 200 KB OK (2 queries)
50 Correct 1 ms 200 KB OK (3 queries)
51 Correct 1 ms 200 KB OK (4 queries)
52 Correct 1 ms 200 KB OK (5 queries)
53 Correct 1 ms 200 KB OK (6 queries)
54 Correct 1 ms 200 KB OK (7 queries)
55 Correct 1 ms 204 KB OK (8 queries)
56 Correct 1 ms 200 KB OK (8 queries)
57 Correct 1 ms 200 KB OK (3 queries)
58 Correct 1 ms 200 KB OK (2 queries)
59 Correct 1 ms 204 KB OK (3 queries)
60 Correct 1 ms 200 KB OK (2 queries)
61 Correct 1 ms 200 KB OK (63 queries)
62 Correct 1 ms 204 KB OK (2 queries)
63 Correct 1 ms 200 KB OK (63 queries)
64 Correct 1 ms 200 KB OK (3 queries)
65 Correct 1 ms 200 KB OK (62 queries)
66 Correct 1 ms 200 KB OK (4 queries)
67 Correct 1 ms 200 KB OK (61 queries)
68 Correct 1 ms 200 KB OK (5 queries)
69 Correct 1 ms 200 KB OK (60 queries)
70 Correct 1 ms 200 KB OK (6 queries)
71 Incorrect 2 ms 200 KB Query limit exceeded
72 Halted 0 ms 0 KB -