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Submission #737706

# Submission time Handle Problem Language Result Execution time Memory
737706 2023-05-07T15:01:08 Z iee Rarest Insects (IOI22_insects) C++17
100 / 100
 67 ms 336 KB 
void move_inside(int i);
void move_outside(int i);
int press_button();
#include <bits/stdc++.h>
using namespace std;
const int MN = 2005;
mt19937 eng(time(0));
int num, k;
int a[MN];
bool b[MN], bu[MN];
void insert(int x) {
	++num;
	move_inside(x - 1);
}
void remove(int x) {
	--num;
	move_outside(x - 1);
}
int min_cardinality(int n) {
	for (int i = 1; i <= n; ++i) {
		insert(i);
		if (press_button() >= 2) {
			remove(i);
		} else {
			b[i] = 1;
			++k;
		}
	}
	if (k == 1)
		return n;
	int l = 2, r = n / k;
	while (l <= r) {
		int mid = l + r >> 1;
		for (int i = 1; i <= n; ++i)
			bu[i] = false, a[i] = i;
		shuffle(a + 1, a + n + 1, eng);
		for (int i = 1; i <= n; ++i)
			if (!b[a[i]]) {
				if (k * mid <= num) break;
				insert(a[i]);
				if (press_button() > mid) {
					remove(a[i]);
				} else {
					bu[a[i]] = 1;
				}
			}
		if (k * mid <= num) {
			l = mid + 1;
			for (int i = 1; i <= n; ++i)
				b[i] |= bu[i];
		} else {
			r = num / k;
			for (int i = 1; i <= n; ++i)
				if (bu[i]) {
					remove(i);
				} else {
					b[i] = 1;
				}
		}
	}
	return r;
}

Compilation message

insects.cpp: In function 'int min_cardinality(int)':
insects.cpp:33:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   33 |   int mid = l + r >> 1;
      |             ~~^~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB Output is correct
2 Correct 0 ms 208 KB Output is correct
3 Correct 1 ms 208 KB Output is correct
4 Correct 1 ms 208 KB Output is correct
5 Correct 1 ms 208 KB Output is correct
6 Correct 3 ms 208 KB Output is correct
7 Correct 2 ms 208 KB Output is correct
8 Correct 5 ms 208 KB Output is correct
9 Correct 5 ms 304 KB Output is correct
10 Correct 5 ms 208 KB Output is correct
11 Correct 3 ms 208 KB Output is correct
12 Correct 4 ms 208 KB Output is correct
13 Correct 5 ms 208 KB Output is correct
14 Correct 6 ms 208 KB Output is correct
15 Correct 5 ms 208 KB Output is correct
16 Correct 6 ms 208 KB Output is correct
17 Correct 4 ms 304 KB Output is correct
18 Correct 5 ms 208 KB Output is correct
19 Correct 5 ms 208 KB Output is correct
20 Correct 4 ms 208 KB Output is correct
21 Correct 3 ms 304 KB Output is correct
22 Correct 2 ms 208 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB Output is correct
2 Correct 0 ms 208 KB Output is correct
3 Correct 1 ms 208 KB Output is correct
4 Correct 1 ms 208 KB Output is correct
5 Correct 1 ms 208 KB Output is correct
6 Correct 3 ms 208 KB Output is correct
7 Correct 2 ms 208 KB Output is correct
8 Correct 5 ms 208 KB Output is correct
9 Correct 5 ms 304 KB Output is correct
10 Correct 5 ms 208 KB Output is correct
11 Correct 3 ms 208 KB Output is correct
12 Correct 4 ms 208 KB Output is correct
13 Correct 5 ms 208 KB Output is correct
14 Correct 6 ms 208 KB Output is correct
15 Correct 5 ms 208 KB Output is correct
16 Correct 6 ms 208 KB Output is correct
17 Correct 4 ms 304 KB Output is correct
18 Correct 5 ms 208 KB Output is correct
19 Correct 5 ms 208 KB Output is correct
20 Correct 4 ms 208 KB Output is correct
21 Correct 3 ms 304 KB Output is correct
22 Correct 2 ms 208 KB Output is correct
23 Correct 13 ms 208 KB Output is correct
24 Correct 9 ms 208 KB Output is correct
25 Correct 24 ms 208 KB Output is correct
26 Correct 29 ms 208 KB Output is correct
27 Correct 16 ms 208 KB Output is correct
28 Correct 7 ms 304 KB Output is correct
29 Correct 30 ms 308 KB Output is correct
30 Correct 22 ms 208 KB Output is correct
31 Correct 21 ms 304 KB Output is correct
32 Correct 18 ms 208 KB Output is correct
33 Correct 20 ms 208 KB Output is correct
34 Correct 24 ms 308 KB Output is correct
35 Correct 24 ms 284 KB Output is correct
36 Correct 15 ms 308 KB Output is correct
37 Correct 22 ms 328 KB Output is correct
38 Correct 19 ms 288 KB Output is correct
39 Correct 17 ms 208 KB Output is correct
40 Correct 12 ms 308 KB Output is correct
41 Correct 11 ms 208 KB Output is correct

Subtask #3
75.0 / 75.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB Output is correct
2 Correct 1 ms 208 KB Output is correct
3 Correct 0 ms 208 KB Output is correct
4 Correct 0 ms 208 KB Output is correct
5 Correct 0 ms 208 KB Output is correct
6 Correct 1 ms 308 KB Output is correct
7 Correct 20 ms 208 KB Output is correct
8 Correct 15 ms 304 KB Output is correct
9 Correct 53 ms 284 KB Output is correct
10 Correct 67 ms 292 KB Output is correct
11 Correct 40 ms 208 KB Output is correct
12 Correct 23 ms 208 KB Output is correct
13 Correct 56 ms 308 KB Output is correct
14 Correct 49 ms 312 KB Output is correct
15 Correct 40 ms 284 KB Output is correct
16 Correct 39 ms 292 KB Output is correct
17 Correct 28 ms 292 KB Output is correct
18 Correct 37 ms 208 KB Output is correct
19 Correct 41 ms 208 KB Output is correct
20 Correct 39 ms 284 KB Output is correct
21 Correct 35 ms 288 KB Output is correct
22 Correct 42 ms 284 KB Output is correct
23 Correct 38 ms 304 KB Output is correct
24 Correct 36 ms 208 KB Output is correct
25 Correct 24 ms 312 KB Output is correct
26 Correct 20 ms 304 KB Output is correct
27 Correct 36 ms 208 KB Output is correct
28 Correct 49 ms 284 KB Output is correct
29 Correct 39 ms 284 KB Output is correct
30 Correct 31 ms 208 KB Output is correct
31 Correct 50 ms 288 KB Output is correct
32 Correct 44 ms 284 KB Output is correct
33 Correct 49 ms 208 KB Output is correct
34 Correct 51 ms 284 KB Output is correct
35 Correct 49 ms 288 KB Output is correct
36 Correct 38 ms 284 KB Output is correct
37 Correct 46 ms 300 KB Output is correct
38 Correct 42 ms 328 KB Output is correct
39 Correct 47 ms 284 KB Output is correct
40 Correct 39 ms 288 KB Output is correct
41 Correct 33 ms 296 KB Output is correct
42 Correct 34 ms 208 KB Output is correct
43 Correct 5 ms 336 KB Output is correct
44 Correct 40 ms 312 KB Output is correct
45 Correct 39 ms 288 KB Output is correct
46 Correct 22 ms 208 KB Output is correct
47 Correct 23 ms 208 KB Output is correct
48 Correct 26 ms 312 KB Output is correct