oj.uz

Submission #649654

# Submission time Handle Problem Language Result Execution time Memory
649654 2022-10-11T07:51:06 Z welleyth Colors (BOI20_colors) C++17
9 / 100
 2 ms 324 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;

#define int long long
#define pb push_back
#define mp make_pair

//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("unroll-loops")
//#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

constexpr int N = (int)2e5 + 111;
constexpr int md = (int)2e5 + 111;

mt19937 rnd(time(nullptr));

set<int> was_asked;

int ask(int x){
    assert(!was_asked.count(x));
    was_asked.insert(x);
    cout << "? " << x << "\n";
    cout.flush();
    int answer;
    cin >> answer;
    return answer;
}

void solve(){
    int n;
    cin >> n;

    ask(1);
    int pr = 1;

    int l = 2, r = n;
    for(int it = 0; l <= r; it^=1){
        if(it == 0){
            int check = ask(r--);
            if(!check){
                cout << "= " << r - l + 3 << "\n";
                return;
            }
        } else {
            int check = ask(l++);
            if(!check){
                cout << "= " << r - l + 3 << "\n";
                return;
            }
        }
    }
    cout << "= " << "1\n";

    return;
}

signed main(){
    ios::sync_with_stdio(false);cin.tie(nullptr);cout.tie(nullptr);
//    init();
    int tests = 1;
//    cin >> tests;
    for(int test = 1; test <= tests; test++){
//        cerr << "test = " << test << "\n";
        solve();
    }
    return 0;
}
/**

**/

Compilation message

Colors.cpp: In function 'void solve()':
Colors.cpp:37:9: warning: unused variable 'pr' [-Wunused-variable]
   37 |     int pr = 1;
      |         ^~

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 1 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 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 1 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 1 ms 208 KB OK (34 queries)
17 Correct 0 ms 208 KB OK (2 queries)
18 Correct 1 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 1 ms 208 KB OK (9 queries)
22 Correct 1 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 1 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 1 ms 208 KB OK (3 queries)
29 Correct 1 ms 208 KB OK (4 queries)
30 Correct 1 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 1 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 1 ms 208 KB OK (3 queries)
38 Correct 1 ms 208 KB OK (4 queries)
39 Correct 1 ms 208 KB OK (5 queries)
40 Correct 0 ms 208 KB OK (6 queries)
41 Correct 1 ms 208 KB OK (6 queries)
42 Correct 1 ms 208 KB OK (2 queries)
43 Correct 1 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 1 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 1 ms 208 KB OK (3 queries)
51 Correct 1 ms 208 KB OK (4 queries)
52 Correct 1 ms 208 KB OK (5 queries)
53 Correct 0 ms 208 KB OK (6 queries)
54 Correct 0 ms 312 KB OK (7 queries)
55 Correct 1 ms 208 KB OK (8 queries)
56 Correct 1 ms 208 KB OK (8 queries)
57 Correct 1 ms 208 KB OK (3 queries)
58 Correct 0 ms 208 KB OK (2 queries)
59 Correct 1 ms 208 KB OK (3 queries)
60 Correct 0 ms 208 KB OK (2 queries)
61 Correct 1 ms 312 KB OK (63 queries)
62 Correct 0 ms 208 KB OK (2 queries)
63 Correct 1 ms 208 KB OK (63 queries)
64 Correct 1 ms 208 KB OK (3 queries)
65 Correct 1 ms 208 KB OK (62 queries)
66 Correct 1 ms 208 KB OK (4 queries)
67 Correct 1 ms 324 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)

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 1 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 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 1 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 1 ms 208 KB OK (34 queries)
17 Correct 0 ms 208 KB OK (2 queries)
18 Correct 1 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 1 ms 208 KB OK (9 queries)
22 Correct 1 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 1 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 1 ms 208 KB OK (3 queries)
29 Correct 1 ms 208 KB OK (4 queries)
30 Correct 1 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 1 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 1 ms 208 KB OK (3 queries)
38 Correct 1 ms 208 KB OK (4 queries)
39 Correct 1 ms 208 KB OK (5 queries)
40 Correct 0 ms 208 KB OK (6 queries)
41 Correct 1 ms 208 KB OK (6 queries)
42 Correct 1 ms 208 KB OK (2 queries)
43 Correct 1 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 1 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 1 ms 208 KB OK (3 queries)
51 Correct 1 ms 208 KB OK (4 queries)
52 Correct 1 ms 208 KB OK (5 queries)
53 Correct 0 ms 208 KB OK (6 queries)
54 Correct 0 ms 312 KB OK (7 queries)
55 Correct 1 ms 208 KB OK (8 queries)
56 Correct 1 ms 208 KB OK (8 queries)
57 Correct 1 ms 208 KB OK (3 queries)
58 Correct 0 ms 208 KB OK (2 queries)
59 Correct 1 ms 208 KB OK (3 queries)
60 Correct 0 ms 208 KB OK (2 queries)
61 Correct 1 ms 312 KB OK (63 queries)
62 Correct 0 ms 208 KB OK (2 queries)
63 Correct 1 ms 208 KB OK (63 queries)
64 Correct 1 ms 208 KB OK (3 queries)
65 Correct 1 ms 208 KB OK (62 queries)
66 Correct 1 ms 208 KB OK (4 queries)
67 Correct 1 ms 324 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 Incorrect 2 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 1 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 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 1 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 1 ms 208 KB OK (34 queries)
17 Correct 0 ms 208 KB OK (2 queries)
18 Correct 1 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 1 ms 208 KB OK (9 queries)
22 Correct 1 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 1 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 1 ms 208 KB OK (3 queries)
29 Correct 1 ms 208 KB OK (4 queries)
30 Correct 1 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 1 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 1 ms 208 KB OK (3 queries)
38 Correct 1 ms 208 KB OK (4 queries)
39 Correct 1 ms 208 KB OK (5 queries)
40 Correct 0 ms 208 KB OK (6 queries)
41 Correct 1 ms 208 KB OK (6 queries)
42 Correct 1 ms 208 KB OK (2 queries)
43 Correct 1 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 1 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 1 ms 208 KB OK (3 queries)
51 Correct 1 ms 208 KB OK (4 queries)
52 Correct 1 ms 208 KB OK (5 queries)
53 Correct 0 ms 208 KB OK (6 queries)
54 Correct 0 ms 312 KB OK (7 queries)
55 Correct 1 ms 208 KB OK (8 queries)
56 Correct 1 ms 208 KB OK (8 queries)
57 Correct 1 ms 208 KB OK (3 queries)
58 Correct 0 ms 208 KB OK (2 queries)
59 Correct 1 ms 208 KB OK (3 queries)
60 Correct 0 ms 208 KB OK (2 queries)
61 Correct 1 ms 312 KB OK (63 queries)
62 Correct 0 ms 208 KB OK (2 queries)
63 Correct 1 ms 208 KB OK (63 queries)
64 Correct 1 ms 208 KB OK (3 queries)
65 Correct 1 ms 208 KB OK (62 queries)
66 Correct 1 ms 208 KB OK (4 queries)
67 Correct 1 ms 324 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 Incorrect 2 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 1 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 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 1 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 1 ms 208 KB OK (34 queries)
17 Correct 0 ms 208 KB OK (2 queries)
18 Correct 1 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 1 ms 208 KB OK (9 queries)
22 Correct 1 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 1 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 1 ms 208 KB OK (3 queries)
29 Correct 1 ms 208 KB OK (4 queries)
30 Correct 1 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 1 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 1 ms 208 KB OK (3 queries)
38 Correct 1 ms 208 KB OK (4 queries)
39 Correct 1 ms 208 KB OK (5 queries)
40 Correct 0 ms 208 KB OK (6 queries)
41 Correct 1 ms 208 KB OK (6 queries)
42 Correct 1 ms 208 KB OK (2 queries)
43 Correct 1 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 1 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 1 ms 208 KB OK (3 queries)
51 Correct 1 ms 208 KB OK (4 queries)
52 Correct 1 ms 208 KB OK (5 queries)
53 Correct 0 ms 208 KB OK (6 queries)
54 Correct 0 ms 312 KB OK (7 queries)
55 Correct 1 ms 208 KB OK (8 queries)
56 Correct 1 ms 208 KB OK (8 queries)
57 Correct 1 ms 208 KB OK (3 queries)
58 Correct 0 ms 208 KB OK (2 queries)
59 Correct 1 ms 208 KB OK (3 queries)
60 Correct 0 ms 208 KB OK (2 queries)
61 Correct 1 ms 312 KB OK (63 queries)
62 Correct 0 ms 208 KB OK (2 queries)
63 Correct 1 ms 208 KB OK (63 queries)
64 Correct 1 ms 208 KB OK (3 queries)
65 Correct 1 ms 208 KB OK (62 queries)
66 Correct 1 ms 208 KB OK (4 queries)
67 Correct 1 ms 324 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 Incorrect 2 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 1 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 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 1 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 1 ms 208 KB OK (34 queries)
17 Correct 0 ms 208 KB OK (2 queries)
18 Correct 1 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 1 ms 208 KB OK (9 queries)
22 Correct 1 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 1 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 1 ms 208 KB OK (3 queries)
29 Correct 1 ms 208 KB OK (4 queries)
30 Correct 1 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 1 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 1 ms 208 KB OK (3 queries)
38 Correct 1 ms 208 KB OK (4 queries)
39 Correct 1 ms 208 KB OK (5 queries)
40 Correct 0 ms 208 KB OK (6 queries)
41 Correct 1 ms 208 KB OK (6 queries)
42 Correct 1 ms 208 KB OK (2 queries)
43 Correct 1 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 1 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 1 ms 208 KB OK (3 queries)
51 Correct 1 ms 208 KB OK (4 queries)
52 Correct 1 ms 208 KB OK (5 queries)
53 Correct 0 ms 208 KB OK (6 queries)
54 Correct 0 ms 312 KB OK (7 queries)
55 Correct 1 ms 208 KB OK (8 queries)
56 Correct 1 ms 208 KB OK (8 queries)
57 Correct 1 ms 208 KB OK (3 queries)
58 Correct 0 ms 208 KB OK (2 queries)
59 Correct 1 ms 208 KB OK (3 queries)
60 Correct 0 ms 208 KB OK (2 queries)
61 Correct 1 ms 312 KB OK (63 queries)
62 Correct 0 ms 208 KB OK (2 queries)
63 Correct 1 ms 208 KB OK (63 queries)
64 Correct 1 ms 208 KB OK (3 queries)
65 Correct 1 ms 208 KB OK (62 queries)
66 Correct 1 ms 208 KB OK (4 queries)
67 Correct 1 ms 324 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 Incorrect 2 ms 208 KB Query limit exceeded
72 Halted 0 ms 0 KB -