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ID	题目	提交者	结果	用时	内存	语言	文件大小	提交时间	测评时间
#430083	#4565. Rarest Insects	james1BadCreeper^#	51.47	50ms	4228kb	C++17	1.8kb	2024-06-03 13:42:21	2024-06-03 13:42:22

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你现在查看的是最新测评结果

[2024-06-03 13:42:22]
评测

测评结果：51.47
用时：50ms
内存：4228kb

查看

[2024-06-03 13:42:21]
提交

answer

#include "insects.h"
#include <bits/stdc++.h>
using namespace std; 
const int N = 2e3 + 5; 

// 最多问 3n 次询问
int n, m, k, id[N], always_no[N]; 
vector<int> arr; 
bool in[N]; 
mt19937 Rand(time(0)); 

void Move_inside(int x) { move_inside(id[x] - 1); }
void Move_outside(int x) { move_outside(id[x] - 1); }
bool check(int x) { // 最罕见的昆虫是否能 >= x
    int cnt = n; 
    vector<int> newarr; 
    shuffle(arr.begin(), arr.end(), Rand); 
    for (int i : arr) {
        Move_inside(i); in[i] = 1; 
        if (press_button() > x) {
            Move_outside(i); in[i] = 0; --cnt; newarr.emplace_back(i); 
            if (cnt < k * x) {
                for (int i : arr)
                    if (in[i]) Move_outside(i), in[i] = 0; 
                return 0; 
            }
        }
    }
    if (cnt == k * x) {
        arr = newarr; 
        // for (int i : newarr) in[i] = 0; 
        return 1; 
    }
    for (int i : arr)
        if (in[i]) Move_outside(i), in[i] = 0; 
    return 0; 
}
int min_cardinality(int N) {
    n = N; 
    k = n; 
    for (int i = 1; i <= n; ++i) id[i] = i, always_no[i] = 0; 
    shuffle(id + 1, id + n + 1, Rand);  
    for (int i = 1; i <= n; ++i) {
        Move_inside(i); 
        if (press_button() > 1) Move_outside(i), --k, arr.emplace_back(i);  
    }

    // 最罕见的出现次数是 1，当且仅当什么时候？
    int L = 0, R = n / k + 1; // [2, n / k]

    while (L + 1 != R) {
        int mid = L + R >> 1; 
        if (check(mid)) L = mid; 
        else R = mid; 
    }
    return L; 
}

// 我们可以知道的信息：

// n 次代价知道昆虫种类数 k
// n 次代价知道最常见的昆虫基数

// 那么最罕见的昆虫的基数至多是 n / k
// 直接扫，

源文件, 语言: C++17

详细

Subtask #1:

score: 10

Accepted

Test #1:

score: 10

Accepted

time: 1ms

memory: 3856kb

input:

output:

result:

ok

Test #2:

score: 10

Accepted

time: 1ms

memory: 3896kb

input:

output:

result:

ok

Test #3:

score: 10

Accepted

time: 1ms

memory: 4192kb

input:

2
1
1

output:

result:

ok

Test #4:

score: 10

Accepted

time: 1ms

memory: 3932kb

input:

output:

result:

ok

Test #5:

score: 10

Accepted

time: 1ms

memory: 3904kb

input:

output:

result:

ok

Test #6:

score: 10

Accepted

time: 1ms

memory: 3908kb

input:

output:

result:

ok

Test #7:

score: 10

Accepted

time: 4ms

memory: 4192kb

input:

output:

result:

ok

Test #8:

score: 10

Accepted

time: 2ms

memory: 3944kb

input:

output:

result:

ok

Test #9:

score: 10

Accepted

time: 3ms

memory: 3900kb

input:

output:

result:

ok

Test #10:

score: 10

Accepted

time: 0ms

memory: 3908kb

input:

output:

result:

ok

Test #11:

score: 10

Accepted

time: 0ms

memory: 3980kb

input:

output:

result:

ok

Test #12:

score: 10

Accepted

time: 1ms

memory: 4192kb

input:

output:

result:

ok

Test #13:

score: 10

Accepted

time: 6ms

memory: 3844kb

input:

output:

result:

ok

Test #14:

score: 10

Accepted

time: 5ms

memory: 3844kb

input:

output:

result:

ok

Test #15:

score: 10

Accepted

time: 2ms

memory: 3904kb

input:

output:

result:

ok

Test #16:

score: 10

Accepted

time: 5ms

memory: 4128kb

input:

output:

result:

ok

Test #17:

score: 10

Accepted

time: 4ms

memory: 4188kb

input:

output:

result:

ok

Test #18:

score: 10

Accepted

time: 2ms

memory: 4184kb

input:

output:

result:

ok

Test #19:

score: 10

Accepted

time: 0ms

memory: 3868kb

input:

output:

result:

ok

Test #20:

score: 10

Accepted

time: 4ms

memory: 4188kb

input:

output:

result:

ok

Test #21:

score: 10

Accepted

time: 0ms

memory: 3892kb

input:

output:

result:

ok

Test #22:

score: 10

Accepted

time: 0ms

memory: 3912kb

input:

output:

result:

ok

Test #23:

score: 10

Accepted

time: 3ms

memory: 4192kb

input:

output:

result:

ok

Subtask #2:

score: 15

Accepted

Test #24:

score: 15

Accepted

time: 0ms

memory: 3924kb

input:

output:

result:

ok

Test #25:

score: 15

Accepted

time: 5ms

memory: 3920kb

input:

output:

result:

ok

Test #26:

score: 15

Accepted

time: 5ms

memory: 3916kb

input:

output:

result:

ok

Test #27:

score: 15

Accepted

time: 8ms

memory: 3912kb

input:

output:

result:

ok

Test #28:

score: 15

Accepted

time: 15ms

memory: 3932kb

input:

output:

result:

ok

Test #29:

score: 15

Accepted

time: 5ms

memory: 3924kb

input:

output:

result:

ok

Test #30:

score: 15

Accepted

time: 20ms

memory: 4216kb

input:

output:

result:

ok

Test #31:

score: 15

Accepted

time: 6ms

memory: 3888kb

input:

output:

result:

ok

Test #32:

score: 15

Accepted

time: 4ms

memory: 4212kb

input:

output:

result:

ok

Test #33:

score: 15

Accepted

time: 0ms

memory: 3804kb

input:

output:

result:

ok

Test #34:

score: 15

Accepted

time: 6ms

memory: 3908kb

input:

output:

result:

ok

Test #35:

score: 15

Accepted

time: 0ms

memory: 3924kb

input:

output:

result:

ok

Test #36:

score: 15

Accepted

time: 10ms

memory: 3888kb

input:

output:

result:

ok

Test #37:

score: 15

Accepted

time: 25ms

memory: 3920kb

input:

output:

result:

ok

Test #38:

score: 15

Accepted

time: 3ms

memory: 3932kb

input:

output:

result:

ok

Test #39:

score: 15

Accepted

time: 0ms

memory: 3912kb

input:

output:

result:

ok

Test #40:

score: 15

Accepted

time: 0ms

memory: 3868kb

input:

output:

result:

ok

Test #41:

score: 15

Accepted

time: 2ms

memory: 4000kb

input:

output:

result:

ok

Test #42:

score: 15

Accepted

time: 0ms

memory: 4208kb

input:

output:

result:

ok

Subtask #3:

score: 26.47

Acceptable Answer

Test #43:

score: 75

Accepted

time: 1ms

memory: 3912kb

input:

output:

result:

ok

Test #44:

score: 75

Accepted

time: 1ms

memory: 4196kb

input:

2
1
1

output:

result:

ok

Test #45:

score: 75

Accepted

time: 1ms

memory: 3936kb

input:

output:

result:

ok

Test #46:

score: 75

Accepted

time: 1ms

memory: 3892kb

input:

output:

result:

ok

Test #47:

score: 75

Accepted

time: 1ms

memory: 3904kb

input:

output:

result:

ok

Test #48:

score: 75

Accepted

time: 17ms

memory: 4004kb

input:

output:

result:

ok

Test #49:

score: 75

Accepted

time: 7ms

memory: 3896kb

input:

output:

result:

ok

Test #50:

score: 75

Accepted

time: 23ms

memory: 3864kb

input:

output:

result:

ok

Test #51:

score: 70.77

Acceptable Answer

time: 6ms

memory: 3996kb

input:

output:

result:

points 0.94360 points  0.94360

Test #52:

score: 26.47

Acceptable Answer

time: 50ms

memory: 4008kb

input:

output:

result:

points 0.35293333330 points  0.35293333330

Test #53:

score: 75

Accepted

time: 0ms

memory: 3924kb

input:

output:

result:

ok

Test #54:

score: 28.88

Acceptable Answer

time: 47ms

memory: 4220kb

input:

output:

result:

points 0.38506666670 points  0.38506666670

Test #55:

score: 58

Acceptable Answer

time: 22ms

memory: 4224kb

input:

output:

result:

points 0.77333333330 points  0.77333333330

Test #56:

score: 74.58

Acceptable Answer

time: 4ms

memory: 3928kb

input:

output:

result:

points 0.99440 points  0.99440

Test #57:

score: 74.52

Acceptable Answer

time: 4ms

memory: 3900kb

input:

output:

result:

points 0.99360 points  0.99360

Test #58:

score: 73.64

Acceptable Answer

time: 10ms

memory: 3868kb

input:

output:

result:

points 0.98186666670 points  0.98186666670

Test #59:

score: 72.84

Acceptable Answer

time: 0ms

memory: 4004kb

input:

output:

result:

points 0.97120 points  0.97120

Test #60:

score: 72.3

Acceptable Answer

time: 9ms

memory: 3920kb

input:

output:

result:

points 0.9640 points  0.9640

Test #61:

score: 72.85

Acceptable Answer

time: 17ms

memory: 3956kb

input:

output:

result:

points 0.97133333330 points  0.97133333330

Test #62:

score: 70.77

Acceptable Answer

time: 21ms

memory: 4216kb

input:

output:

result:

points 0.94360 points  0.94360

Test #63:

score: 73.09

Acceptable Answer

time: 21ms

memory: 3924kb

input:

output:

result:

points 0.97453333330 points  0.97453333330

Test #64:

score: 71.9

Acceptable Answer

time: 4ms

memory: 3884kb

input:

output:

result:

points 0.95866666670 points  0.95866666670

Test #65:

score: 75

Accepted

time: 6ms

memory: 4008kb

input:

output:

result:

ok

Test #66:

score: 75

Accepted

time: 7ms

memory: 3872kb

input:

output:

result:

ok

Test #67:

score: 75

Accepted

time: 0ms

memory: 3924kb

input:

output:

result:

ok

Test #68:

score: 74.76

Acceptable Answer

time: 3ms

memory: 3928kb

input:

output:

result:

points 0.99680 points  0.99680

Test #69:

score: 74.76

Acceptable Answer

time: 11ms

memory: 3984kb

input:

output:

result:

points 0.99680 points  0.99680

Test #70:

score: 74.89

Acceptable Answer

time: 12ms

memory: 4216kb

input:

output:

result:

points 0.99853333330 points  0.99853333330

Test #71:

score: 74.89

Acceptable Answer

time: 9ms

memory: 3920kb

input:

output:

result:

points 0.99853333330 points  0.99853333330

Test #72:

score: 70.84

Acceptable Answer

time: 9ms

memory: 3828kb

input:

output:

result:

points 0.94453333330 points  0.94453333330

Test #73:

score: 70.84

Acceptable Answer

time: 15ms

memory: 3916kb

input:

output:

result:

points 0.94453333330 points  0.94453333330

Test #74:

score: 66.26

Acceptable Answer

time: 10ms

memory: 3944kb

input:

output:

result:

points 0.88346666670 points  0.88346666670

Test #75:

score: 66.26

Acceptable Answer

time: 0ms

memory: 4228kb

input:

output:

result:

points 0.88346666670 points  0.88346666670

Test #76:

score: 74.9

Acceptable Answer

time: 6ms

memory: 3924kb

input:

output:

result:

points 0.99866666670 points  0.99866666670

Test #77:

score: 74.9

Acceptable Answer

time: 5ms

memory: 3944kb

input:

output:

result:

points 0.99866666670 points  0.99866666670

Test #78:

score: 70.83

Acceptable Answer

time: 0ms

memory: 3952kb

input:

output:

result:

points 0.94440 points  0.94440

Test #79:

score: 70.83

Acceptable Answer

time: 11ms

memory: 3896kb

input:

output:

result:

points 0.94440 points  0.94440

Test #80:

score: 74.8

Acceptable Answer

time: 11ms

memory: 3896kb

input:

output:

result:

points 0.99733333330 points  0.99733333330

Test #81:

score: 74.8

Acceptable Answer

time: 6ms

memory: 3872kb

input:

output:

result:

points 0.99733333330 points  0.99733333330

Test #82:

score: 74.93

Acceptable Answer

time: 4ms

memory: 4000kb

input:

output:

result:

points 0.99906666670 points  0.99906666670

Test #83:

score: 74.93

Acceptable Answer

time: 4ms

memory: 3928kb

input:

output:

result:

points 0.99906666670 points  0.99906666670

Test #84:

score: 50.02

Acceptable Answer

time: 2ms

memory: 3920kb

input:

output:

result:

points 0.66693333330 points  0.66693333330

Test #85:

score: 35.12

Acceptable Answer

time: 25ms

memory: 3928kb

input:

output:

result:

points 0.46826666670 points  0.46826666670

Test #86:

score: 75

Accepted

time: 3ms

memory: 4220kb

input:

output:

result:

ok

Test #87:

score: 75

Accepted

time: 0ms

memory: 3924kb

input:

output:

result:

ok

Test #88:

score: 75

Accepted

time: 9ms

memory: 3924kb

input:

output:

result:

ok

Test #89:

score: 75

Accepted

time: 7ms

memory: 4144kb

input:

output:

result:

ok