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QOJ

ID	Problem	Submitter	Result	Time	Memory	Language	File size	Submit time	Judge time
#23749	#2960. Social Distancing	George_Plover^#	WA	3ms	3668kb	C++20	573b	2022-03-19 12:36:34	2022-04-30 04:05:12

Judging History

你现在查看的是最新测评结果

[2023-08-10 23:21:45]
System Update: QOJ starts to keep a history of the judgings of all the submissions.

[2022-04-30 04:05:12]
评测

测评结果：WA
用时：3ms
内存：3668kb

查看

[2022-03-19 12:36:34]
提交

answer

#include <bits/stdc++.h>

using namespace std;

int n, k, a, b, c;

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    cin >> n >> k;

    for (a = -1; k--; a = b)
    {
        cin >> b;
        c += max(0, ((b - a) >> 1) - 1);
        // cerr << "CUR A " << a << " B " << b << " ADD " << max(0, ((b - a) >> 1) - 1) << '\n';
    }

    // cerr << "CUR A " << a << " B " << (n + 1) << " ADD " << max(0, ((n + 1 - a) >> 1) - 1) << '\n';
    c += max(0, ((n + 1 - a) >> 1) - 1);
    cout << c << '\n';
    return 0;
}

Source code, Language: C++20

Details

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Test #1:

score: 100

Accepted

time: 0ms

memory: 3668kb

input:

9 2
2 6

output:

result:

ok single line: '2'

Test #2:

score: 0

Accepted

time: 3ms

memory: 3580kb

input:

10 3
1 4 7

output:

result:

ok single line: '1'

Test #3:

score: 0

Accepted

time: 3ms

memory: 3608kb

input:

6 2
2 5

output:

result:

ok single line: '0'

Test #4:

score: 0

Accepted

time: 3ms

memory: 3464kb

input:

100 5
7 14 47 78 99

output:

result:

ok single line: '43'

Test #5:

score: 0

Accepted

time: 2ms

memory: 3660kb

input:

6 1
3

output:

result:

ok single line: '2'

Test #6:

score: 0

Accepted

time: 3ms

memory: 3604kb

input:

3 1
1

output:

result:

ok single line: '0'

Test #7:

score: 0

Accepted

time: 0ms

memory: 3580kb

input:

4 2
1 3

output:

result:

ok single line: '0'

Test #8:

score: 0

Accepted

time: 1ms

memory: 3648kb

input:

4 2
2 4

output:

result:

ok single line: '0'

Test #9:

score: 0

Accepted

time: 3ms

memory: 3580kb

input:

5 2
1 3

output:

result:

ok single line: '0'

Test #10:

score: 0

Accepted

time: 2ms

memory: 3628kb

input:

5 2
2 4

output:

result:

ok single line: '0'

Test #11:

score: -100

Wrong Answer

time: 1ms

memory: 3460kb

input:

5 2
3 5

output:

result:

wrong answer 1st lines differ - expected: '0', found: '1'