Submission #1033007

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1033007	2024-07-24T11:54:05 Z	goodspeed0208	Colors (BOI20_colors)	C++14	0 / 100	1 ms	344 KB

Colors

#include<bits/stdc++.h>
using namespace std;

signed main() {
	int n;
	cin >> n;
	
	int c;
	if (n == 2) {
		cout << "? 1" << endl; cin >> c;
		cout << "? 2" << endl; cin >> c;
		if (c == 1) cout << "= 2" << endl;
		else cout << "= 1" << endl;
		return 0;
	} else if (n == 3) {
		cout << "? 2" << endl; cin >> c;
		cout << "? 3" << endl; cin >> c;
		if (c == 1) cout << "= 1" << endl;
		else {
			cout << "? 1" << endl; cin >> c;
			if (c == 1) cout << "= 2" << endl;
			else cout << "= 3" << endl;
		}
		return 0;
		
	}
	int l = 2, r = n+1, t = 0, ans = n, end = 0;
	//if (n == 3) r = 5;
	cout << "? " << l << "\n";
	cin >> c;
	while (!end) {
		if (t) {
			l += 2;
			cout << "? " << l << endl;
		} else {
			r -= 2;
			cout << "? " << r << endl;
		}
		cin >> c;
		if (c == 0) break;
		else {
			ans = min(ans, r - l);
			if (ans <= 2) break;
		}
		t ^= 1;
	}
	if (c == 1) {
		if (ans == 2) {
			if (t) {
				cout << "? " << r-1 << endl;
			} else {
				cout << "? " << l+1 << endl;
			}
			cin >> c;
			if (c) ans = 1;
		}
		cout << "= " << ans << endl;
		return 0;
	}
	while (c == 0) {
		if (t) {
			r++;
			cout << "? " << r << endl;	
		} else {
			l--;
			cout << "? " << l << endl;
		}
		t ^= 1;
		cin >> c;
		if (c == 1) {
			ans = min(ans, r - l);
			end = 1;
		}
		if (c == 0 && (r - l == ans-1)) {
			end = 1;
			break;
		}
	}
	cout << "= " << ans << endl;
}

Subtask #1

0 / 9.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	344 KB	OK (4 queries)
2	Correct	1 ms	344 KB	OK (4 queries)
3	Correct	0 ms	344 KB	OK (6 queries)
4	Correct	0 ms	344 KB	OK (13 queries)
5	Correct	1 ms	344 KB	OK (8 queries)
6	Correct	0 ms	344 KB	OK (14 queries)
7	Correct	0 ms	344 KB	OK (10 queries)
8	Correct	0 ms	344 KB	OK (5 queries)
9	Correct	0 ms	344 KB	OK (6 queries)
10	Correct	1 ms	344 KB	OK (6 queries)
11	Correct	1 ms	344 KB	OK (3 queries)
12	Correct	0 ms	344 KB	OK (4 queries)
13	Correct	1 ms	344 KB	OK (7 queries)
14	Correct	0 ms	344 KB	OK (9 queries)
15	Correct	0 ms	344 KB	OK (7 queries)
16	Correct	0 ms	344 KB	OK (18 queries)
17	Correct	0 ms	344 KB	OK (4 queries)
18	Correct	0 ms	344 KB	OK (9 queries)
19	Correct	0 ms	344 KB	OK (4 queries)
20	Correct	0 ms	344 KB	OK (17 queries)
21	Correct	1 ms	344 KB	OK (6 queries)
22	Incorrect	0 ms	344 KB	Wrong guess
23	Halted	0 ms	0 KB	-

Subtask #2

0 / 13.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	344 KB	OK (4 queries)
2	Correct	1 ms	344 KB	OK (4 queries)
3	Correct	0 ms	344 KB	OK (6 queries)
4	Correct	0 ms	344 KB	OK (13 queries)
5	Correct	1 ms	344 KB	OK (8 queries)
6	Correct	0 ms	344 KB	OK (14 queries)
7	Correct	0 ms	344 KB	OK (10 queries)
8	Correct	0 ms	344 KB	OK (5 queries)
9	Correct	0 ms	344 KB	OK (6 queries)
10	Correct	1 ms	344 KB	OK (6 queries)
11	Correct	1 ms	344 KB	OK (3 queries)
12	Correct	0 ms	344 KB	OK (4 queries)
13	Correct	1 ms	344 KB	OK (7 queries)
14	Correct	0 ms	344 KB	OK (9 queries)
15	Correct	0 ms	344 KB	OK (7 queries)
16	Correct	0 ms	344 KB	OK (18 queries)
17	Correct	0 ms	344 KB	OK (4 queries)
18	Correct	0 ms	344 KB	OK (9 queries)
19	Correct	0 ms	344 KB	OK (4 queries)
20	Correct	0 ms	344 KB	OK (17 queries)
21	Correct	1 ms	344 KB	OK (6 queries)
22	Incorrect	0 ms	344 KB	Wrong guess
23	Halted	0 ms	0 KB	-

Subtask #3

0 / 21.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	344 KB	OK (4 queries)
2	Correct	1 ms	344 KB	OK (4 queries)
3	Correct	0 ms	344 KB	OK (6 queries)
4	Correct	0 ms	344 KB	OK (13 queries)
5	Correct	1 ms	344 KB	OK (8 queries)
6	Correct	0 ms	344 KB	OK (14 queries)
7	Correct	0 ms	344 KB	OK (10 queries)
8	Correct	0 ms	344 KB	OK (5 queries)
9	Correct	0 ms	344 KB	OK (6 queries)
10	Correct	1 ms	344 KB	OK (6 queries)
11	Correct	1 ms	344 KB	OK (3 queries)
12	Correct	0 ms	344 KB	OK (4 queries)
13	Correct	1 ms	344 KB	OK (7 queries)
14	Correct	0 ms	344 KB	OK (9 queries)
15	Correct	0 ms	344 KB	OK (7 queries)
16	Correct	0 ms	344 KB	OK (18 queries)
17	Correct	0 ms	344 KB	OK (4 queries)
18	Correct	0 ms	344 KB	OK (9 queries)
19	Correct	0 ms	344 KB	OK (4 queries)
20	Correct	0 ms	344 KB	OK (17 queries)
21	Correct	1 ms	344 KB	OK (6 queries)
22	Incorrect	0 ms	344 KB	Wrong guess
23	Halted	0 ms	0 KB	-

Subtask #4

0 / 24.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	344 KB	OK (4 queries)
2	Correct	1 ms	344 KB	OK (4 queries)
3	Correct	0 ms	344 KB	OK (6 queries)
4	Correct	0 ms	344 KB	OK (13 queries)
5	Correct	1 ms	344 KB	OK (8 queries)
6	Correct	0 ms	344 KB	OK (14 queries)
7	Correct	0 ms	344 KB	OK (10 queries)
8	Correct	0 ms	344 KB	OK (5 queries)
9	Correct	0 ms	344 KB	OK (6 queries)
10	Correct	1 ms	344 KB	OK (6 queries)
11	Correct	1 ms	344 KB	OK (3 queries)
12	Correct	0 ms	344 KB	OK (4 queries)
13	Correct	1 ms	344 KB	OK (7 queries)
14	Correct	0 ms	344 KB	OK (9 queries)
15	Correct	0 ms	344 KB	OK (7 queries)
16	Correct	0 ms	344 KB	OK (18 queries)
17	Correct	0 ms	344 KB	OK (4 queries)
18	Correct	0 ms	344 KB	OK (9 queries)
19	Correct	0 ms	344 KB	OK (4 queries)
20	Correct	0 ms	344 KB	OK (17 queries)
21	Correct	1 ms	344 KB	OK (6 queries)
22	Incorrect	0 ms	344 KB	Wrong guess
23	Halted	0 ms	0 KB	-

Subtask #5

0 / 33.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	344 KB	OK (4 queries)
2	Correct	1 ms	344 KB	OK (4 queries)
3	Correct	0 ms	344 KB	OK (6 queries)
4	Correct	0 ms	344 KB	OK (13 queries)
5	Correct	1 ms	344 KB	OK (8 queries)
6	Correct	0 ms	344 KB	OK (14 queries)
7	Correct	0 ms	344 KB	OK (10 queries)
8	Correct	0 ms	344 KB	OK (5 queries)
9	Correct	0 ms	344 KB	OK (6 queries)
10	Correct	1 ms	344 KB	OK (6 queries)
11	Correct	1 ms	344 KB	OK (3 queries)
12	Correct	0 ms	344 KB	OK (4 queries)
13	Correct	1 ms	344 KB	OK (7 queries)
14	Correct	0 ms	344 KB	OK (9 queries)
15	Correct	0 ms	344 KB	OK (7 queries)
16	Correct	0 ms	344 KB	OK (18 queries)
17	Correct	0 ms	344 KB	OK (4 queries)
18	Correct	0 ms	344 KB	OK (9 queries)
19	Correct	0 ms	344 KB	OK (4 queries)
20	Correct	0 ms	344 KB	OK (17 queries)
21	Correct	1 ms	344 KB	OK (6 queries)
22	Incorrect	0 ms	344 KB	Wrong guess
23	Halted	0 ms	0 KB	-