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Submission #628152

# Submission time Handle Problem Language Result Execution time Memory
628152 2022-08-13T06:33:58 Z haojiandan Rarest Insects (IOI22_insects) C++17
100 / 100
 62 ms 428 KB 
#include "insects.h"
#include <bits/stdc++.h>
using namespace std;
int n;
int p[10000];
int min_cardinality(int _n) {
	n=_n; vector<int> V; int cnt=0;
	for (int i=0;i<n;i++) p[i]=i; random_shuffle(p,p+n);
	for (int i=0;i<n;i++) {
		move_inside(p[i]);
		if (press_button()>1) move_outside(p[i]),V.push_back(p[i]); else cnt++;
	}
	if (cnt==1) return n;
	if (cnt==2) {
		for (int i=0;i<n;i++) move_inside(i);
		return n-press_button();
	}
	int l=2,r=n/cnt,mid,res=1;
	int lst=1;
	while (l<=r) {
		mid=(l+r)>>1;
		vector<int> V1,V2; int c=0;
		int id=0;
		for (int &x : V) {
			move_inside(x); id++;
			if (press_button()>mid) move_outside(x),V2.push_back(x); else c++,V1.push_back(x);
			if (c==cnt*(mid-lst)) { for (int i=id;i<V.size();i++) V2.push_back(V[i]); break; }
		}
		if (c==cnt*(mid-lst)) {
			res=mid; V.swap(V2); lst=mid; l=mid+1;
		} else {
			r=mid-1; for (int &x : V1) move_outside(x); V.swap(V1);
		}
	}
	return res;
}

Compilation message

insects.cpp: In function 'int min_cardinality(int)':
insects.cpp:8:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
    8 |  for (int i=0;i<n;i++) p[i]=i; random_shuffle(p,p+n);
      |  ^~~
insects.cpp:8:32: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
    8 |  for (int i=0;i<n;i++) p[i]=i; random_shuffle(p,p+n);
      |                                ^~~~~~~~~~~~~~
insects.cpp:27:43: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |    if (c==cnt*(mid-lst)) { for (int i=id;i<V.size();i++) V2.push_back(V[i]); break; }
      |                                          ~^~~~~~~~~

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 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 2 ms 208 KB Output is correct
7 Correct 2 ms 208 KB Output is correct
8 Correct 4 ms 208 KB Output is correct
9 Correct 7 ms 208 KB Output is correct
10 Correct 2 ms 208 KB Output is correct
11 Correct 2 ms 208 KB Output is correct
12 Correct 5 ms 208 KB Output is correct
13 Correct 5 ms 208 KB Output is correct
14 Correct 4 ms 208 KB Output is correct
15 Correct 5 ms 308 KB Output is correct
16 Correct 7 ms 208 KB Output is correct
17 Correct 3 ms 304 KB Output is correct
18 Correct 6 ms 208 KB Output is correct
19 Correct 2 ms 208 KB Output is correct
20 Correct 5 ms 208 KB Output is correct
21 Correct 3 ms 208 KB Output is correct
22 Correct 3 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 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 2 ms 208 KB Output is correct
7 Correct 2 ms 208 KB Output is correct
8 Correct 4 ms 208 KB Output is correct
9 Correct 7 ms 208 KB Output is correct
10 Correct 2 ms 208 KB Output is correct
11 Correct 2 ms 208 KB Output is correct
12 Correct 5 ms 208 KB Output is correct
13 Correct 5 ms 208 KB Output is correct
14 Correct 4 ms 208 KB Output is correct
15 Correct 5 ms 308 KB Output is correct
16 Correct 7 ms 208 KB Output is correct
17 Correct 3 ms 304 KB Output is correct
18 Correct 6 ms 208 KB Output is correct
19 Correct 2 ms 208 KB Output is correct
20 Correct 5 ms 208 KB Output is correct
21 Correct 3 ms 208 KB Output is correct
22 Correct 3 ms 208 KB Output is correct
23 Correct 10 ms 208 KB Output is correct
24 Correct 9 ms 208 KB Output is correct
25 Correct 31 ms 312 KB Output is correct
26 Correct 19 ms 316 KB Output is correct
27 Correct 9 ms 336 KB Output is correct
28 Correct 7 ms 304 KB Output is correct
29 Correct 28 ms 308 KB Output is correct
30 Correct 27 ms 208 KB Output is correct
31 Correct 25 ms 316 KB Output is correct
32 Correct 24 ms 316 KB Output is correct
33 Correct 25 ms 308 KB Output is correct
34 Correct 26 ms 304 KB Output is correct
35 Correct 15 ms 292 KB Output is correct
36 Correct 30 ms 308 KB Output is correct
37 Correct 14 ms 312 KB Output is correct
38 Correct 21 ms 208 KB Output is correct
39 Correct 19 ms 296 KB Output is correct
40 Correct 15 ms 316 KB Output is correct
41 Correct 7 ms 208 KB Output is correct

Subtask #3
75.0 / 75.0

# Verdict Execution time Memory Grader output
1 Correct 0 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 0 ms 208 KB Output is correct
5 Correct 0 ms 208 KB Output is correct
6 Correct 0 ms 208 KB Output is correct
7 Correct 9 ms 320 KB Output is correct
8 Correct 21 ms 208 KB Output is correct
9 Correct 47 ms 308 KB Output is correct
10 Correct 47 ms 316 KB Output is correct
11 Correct 9 ms 320 KB Output is correct
12 Correct 27 ms 208 KB Output is correct
13 Correct 60 ms 304 KB Output is correct
14 Correct 51 ms 308 KB Output is correct
15 Correct 27 ms 320 KB Output is correct
16 Correct 47 ms 428 KB Output is correct
17 Correct 36 ms 208 KB Output is correct
18 Correct 47 ms 304 KB Output is correct
19 Correct 43 ms 316 KB Output is correct
20 Correct 37 ms 308 KB Output is correct
21 Correct 46 ms 324 KB Output is correct
22 Correct 58 ms 308 KB Output is correct
23 Correct 52 ms 304 KB Output is correct
24 Correct 42 ms 312 KB Output is correct
25 Correct 19 ms 312 KB Output is correct
26 Correct 15 ms 308 KB Output is correct
27 Correct 36 ms 304 KB Output is correct
28 Correct 39 ms 316 KB Output is correct
29 Correct 31 ms 312 KB Output is correct
30 Correct 37 ms 320 KB Output is correct
31 Correct 46 ms 208 KB Output is correct
32 Correct 62 ms 312 KB Output is correct
33 Correct 50 ms 312 KB Output is correct
34 Correct 62 ms 316 KB Output is correct
35 Correct 53 ms 300 KB Output is correct
36 Correct 37 ms 208 KB Output is correct
37 Correct 50 ms 316 KB Output is correct
38 Correct 56 ms 300 KB Output is correct
39 Correct 24 ms 312 KB Output is correct
40 Correct 33 ms 308 KB Output is correct
41 Correct 48 ms 312 KB Output is correct
42 Correct 44 ms 304 KB Output is correct
43 Correct 10 ms 308 KB Output is correct
44 Correct 38 ms 312 KB Output is correct
45 Correct 19 ms 316 KB Output is correct
46 Correct 37 ms 308 KB Output is correct
47 Correct 32 ms 208 KB Output is correct
48 Correct 23 ms 300 KB Output is correct