Submission #1033135

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1033135	2024-07-24T13:12:51 Z	goodspeed0208	Colors (BOI20_colors)	C++14	0 / 100	1 ms	424 KB

Colors

#include<bits/stdc++.h>
using namespace std;
 
signed main() {
	int n;
	cin >> n;
	set<int>st;
	
	int c;
	if (n == 2) {
		cout << "? 1" << endl; cin >> c;
		cout << "? 2" << endl; cin >> c;
		if (c == 1) cout << "= 1" << endl;
		else cout << "= 2" << 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 = 1, r = n, t = 1, ans= n;
		cout << "? " << 1 << endl; cin >> c;
		while (ans > 1) {
			if (t) {
				r--;
				assert(st.find(r) == st.end());
				cout << "? " << r << endl;
			} else {
				l++;
				assert(st.find(l) == st.end());
				cout << "? " << l << endl;
			}
			t ^= 1;
			cin >> c;
			if (c == 1) ans = r - l;
			else break;
		}
		cout << "= " << ans << endl;
		return 0;
	
}
 

Subtask #1

0 / 9.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	344 KB	OK (4 queries)
2	Correct	0 ms	344 KB	OK (5 queries)
3	Correct	0 ms	344 KB	OK (9 queries)
4	Correct	0 ms	344 KB	OK (25 queries)
5	Correct	0 ms	344 KB	OK (12 queries)
6	Correct	0 ms	344 KB	OK (25 queries)
7	Correct	0 ms	344 KB	OK (16 queries)
8	Correct	0 ms	344 KB	OK (6 queries)
9	Correct	1 ms	344 KB	OK (8 queries)
10	Correct	0 ms	344 KB	OK (10 queries)
11	Correct	0 ms	424 KB	OK (3 queries)
12	Correct	0 ms	344 KB	OK (4 queries)
13	Correct	0 ms	344 KB	OK (10 queries)
14	Correct	0 ms	344 KB	OK (15 queries)
15	Correct	0 ms	344 KB	OK (10 queries)
16	Correct	1 ms	344 KB	OK (33 queries)
17	Correct	0 ms	344 KB	OK (2 queries)
18	Correct	0 ms	344 KB	OK (15 queries)
19	Incorrect	1 ms	344 KB	Wrong guess
20	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	0 ms	344 KB	OK (5 queries)
3	Correct	0 ms	344 KB	OK (9 queries)
4	Correct	0 ms	344 KB	OK (25 queries)
5	Correct	0 ms	344 KB	OK (12 queries)
6	Correct	0 ms	344 KB	OK (25 queries)
7	Correct	0 ms	344 KB	OK (16 queries)
8	Correct	0 ms	344 KB	OK (6 queries)
9	Correct	1 ms	344 KB	OK (8 queries)
10	Correct	0 ms	344 KB	OK (10 queries)
11	Correct	0 ms	424 KB	OK (3 queries)
12	Correct	0 ms	344 KB	OK (4 queries)
13	Correct	0 ms	344 KB	OK (10 queries)
14	Correct	0 ms	344 KB	OK (15 queries)
15	Correct	0 ms	344 KB	OK (10 queries)
16	Correct	1 ms	344 KB	OK (33 queries)
17	Correct	0 ms	344 KB	OK (2 queries)
18	Correct	0 ms	344 KB	OK (15 queries)
19	Incorrect	1 ms	344 KB	Wrong guess
20	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	0 ms	344 KB	OK (5 queries)
3	Correct	0 ms	344 KB	OK (9 queries)
4	Correct	0 ms	344 KB	OK (25 queries)
5	Correct	0 ms	344 KB	OK (12 queries)
6	Correct	0 ms	344 KB	OK (25 queries)
7	Correct	0 ms	344 KB	OK (16 queries)
8	Correct	0 ms	344 KB	OK (6 queries)
9	Correct	1 ms	344 KB	OK (8 queries)
10	Correct	0 ms	344 KB	OK (10 queries)
11	Correct	0 ms	424 KB	OK (3 queries)
12	Correct	0 ms	344 KB	OK (4 queries)
13	Correct	0 ms	344 KB	OK (10 queries)
14	Correct	0 ms	344 KB	OK (15 queries)
15	Correct	0 ms	344 KB	OK (10 queries)
16	Correct	1 ms	344 KB	OK (33 queries)
17	Correct	0 ms	344 KB	OK (2 queries)
18	Correct	0 ms	344 KB	OK (15 queries)
19	Incorrect	1 ms	344 KB	Wrong guess
20	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	0 ms	344 KB	OK (5 queries)
3	Correct	0 ms	344 KB	OK (9 queries)
4	Correct	0 ms	344 KB	OK (25 queries)
5	Correct	0 ms	344 KB	OK (12 queries)
6	Correct	0 ms	344 KB	OK (25 queries)
7	Correct	0 ms	344 KB	OK (16 queries)
8	Correct	0 ms	344 KB	OK (6 queries)
9	Correct	1 ms	344 KB	OK (8 queries)
10	Correct	0 ms	344 KB	OK (10 queries)
11	Correct	0 ms	424 KB	OK (3 queries)
12	Correct	0 ms	344 KB	OK (4 queries)
13	Correct	0 ms	344 KB	OK (10 queries)
14	Correct	0 ms	344 KB	OK (15 queries)
15	Correct	0 ms	344 KB	OK (10 queries)
16	Correct	1 ms	344 KB	OK (33 queries)
17	Correct	0 ms	344 KB	OK (2 queries)
18	Correct	0 ms	344 KB	OK (15 queries)
19	Incorrect	1 ms	344 KB	Wrong guess
20	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	0 ms	344 KB	OK (5 queries)
3	Correct	0 ms	344 KB	OK (9 queries)
4	Correct	0 ms	344 KB	OK (25 queries)
5	Correct	0 ms	344 KB	OK (12 queries)
6	Correct	0 ms	344 KB	OK (25 queries)
7	Correct	0 ms	344 KB	OK (16 queries)
8	Correct	0 ms	344 KB	OK (6 queries)
9	Correct	1 ms	344 KB	OK (8 queries)
10	Correct	0 ms	344 KB	OK (10 queries)
11	Correct	0 ms	424 KB	OK (3 queries)
12	Correct	0 ms	344 KB	OK (4 queries)
13	Correct	0 ms	344 KB	OK (10 queries)
14	Correct	0 ms	344 KB	OK (15 queries)
15	Correct	0 ms	344 KB	OK (10 queries)
16	Correct	1 ms	344 KB	OK (33 queries)
17	Correct	0 ms	344 KB	OK (2 queries)
18	Correct	0 ms	344 KB	OK (15 queries)
19	Incorrect	1 ms	344 KB	Wrong guess
20	Halted	0 ms	0 KB	-