QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#505078#7178. BishopsEsoulingWA 119ms23452kbC++201.3kb2024-08-04 19:29:172024-08-04 19:29:18

Judging History

你现在查看的是最新测评结果

  • [2024-08-04 19:29:18]
  • 评测
  • 测评结果:WA
  • 用时:119ms
  • 内存:23452kb
  • [2024-08-04 19:29:17]
  • 提交

answer

#include <bits/stdc++.h>

using loint = long long;
using db = double;

void solve() {
    
    int n, m;
    std::cin >> n >> m;
    int inv = 0;
    if (n > m) {
        std::swap(n, m);
        inv = 1;
    }
    std::vector<std::pair<int, int>> ans;
    std::set<int> st1, st2;

    int l = 1, r = m;
    int cur = 1;
    while (l <= r) {
        if (cur & 1) {
            for (int i = 1; i <= n; i ++) {
                if (st1.count(i + l) == 0 && st2.count(i - l) == 0) {
                    st1.insert(i + l);
                    st2.insert(i - l);
                    ans.push_back({i, l});
                }
            }
            l += std::max(1, n - 2);
        } else {
            for (int i = 1; i <= n; i ++) {
                if (st1.count(i + r) == 0 && st2.count(i - r) == 0) {
                    st1.insert(i + r);
                    st2.insert(i - r);
                    ans.push_back({i, r});
                }
            }
            r -= std::max(1, n - 2);
        }
        cur ^= 1;
    }

    std::cout << ans.size() << '\n';
    for (auto &[x, y] : ans) {
        if (inv) std::swap(x, y);
        std::cout << x << ' ' << y << '\n';
    }
}

int main() {

    std::ios::sync_with_stdio(false);
    std::cin.tie(0);
    std::cout.tie(0);

    solve();

    return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 3820kb

input:

2 5

output:

6
1 1
2 1
1 5
2 5
1 3
2 3

result:

ok n: 2, m: 5, bishops: 6

Test #2:

score: 0
Accepted
time: 0ms
memory: 3608kb

input:

5 5

output:

8
1 1
2 1
3 1
4 1
5 1
2 5
3 5
4 5

result:

ok n: 5, m: 5, bishops: 8

Test #3:

score: 0
Accepted
time: 110ms
memory: 23368kb

input:

100000 100000

output:

199998
1 1
2 1
3 1
4 1
5 1
6 1
7 1
8 1
9 1
10 1
11 1
12 1
13 1
14 1
15 1
16 1
17 1
18 1
19 1
20 1
21 1
22 1
23 1
24 1
25 1
26 1
27 1
28 1
29 1
30 1
31 1
32 1
33 1
34 1
35 1
36 1
37 1
38 1
39 1
40 1
41 1
42 1
43 1
44 1
45 1
46 1
47 1
48 1
49 1
50 1
51 1
52 1
53 1
54 1
55 1
56 1
57 1
58 1
59 1
60 1
61...

result:

ok n: 100000, m: 100000, bishops: 199998

Test #4:

score: 0
Accepted
time: 119ms
memory: 23452kb

input:

100000 99999

output:

199998
1 1
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
1 10
1 11
1 12
1 13
1 14
1 15
1 16
1 17
1 18
1 19
1 20
1 21
1 22
1 23
1 24
1 25
1 26
1 27
1 28
1 29
1 30
1 31
1 32
1 33
1 34
1 35
1 36
1 37
1 38
1 39
1 40
1 41
1 42
1 43
1 44
1 45
1 46
1 47
1 48
1 49
1 50
1 51
1 52
1 53
1 54
1 55
1 56
1 57
1 58
1 59
1 60
1 ...

result:

ok n: 100000, m: 99999, bishops: 199998

Test #5:

score: -100
Wrong Answer
time: 87ms
memory: 18492kb

input:

100000 50000

output:

149996
1 1
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
1 10
1 11
1 12
1 13
1 14
1 15
1 16
1 17
1 18
1 19
1 20
1 21
1 22
1 23
1 24
1 25
1 26
1 27
1 28
1 29
1 30
1 31
1 32
1 33
1 34
1 35
1 36
1 37
1 38
1 39
1 40
1 41
1 42
1 43
1 44
1 45
1 46
1 47
1 48
1 49
1 50
1 51
1 52
1 53
1 54
1 55
1 56
1 57
1 58
1 59
1 60
1 ...

result:

wrong answer Participant's answer is not optimal (149996 < 149998)