QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#99924#5251. Constellationscardinal_city#WA 1756ms102144kbC++201.7kb2023-04-24 03:54:522023-04-24 03:54:54

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.
  • [2023-04-24 03:54:54]
  • 评测
  • 测评结果:WA
  • 用时:1756ms
  • 内存:102144kb
  • [2023-04-24 03:54:52]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

struct Clln {
    int ind;
    ll sqr, sumx, sumy;
    int sz;
    bool operator< (const Clln &o) const {
        return ind < o.ind;
    }

    pair<ll, ll> dist_to(const Clln &o) {
        return {sqr + o.sqr - 2*sumx*o.sumx - 2*sumy*o.sumy, sz * o.sz};
    }
};

struct Dist {
    pair<ll, ll> d; int ai, bi;
    bool operator< (const Dist &o) const {
        return d.first * o.d.second > o.d.first * d.second;
    }
};

int main() {
    int n; cin >> n;
    vector<Clln> cllns(2*n+1, { -1, 0, 0, 0, 0 });
    priority_queue<Dist> dsts;
    vector<bool> used(2*n+1);
    for (int i = 0; i < n; i++) {
        ll x, y; cin >> x >> y;
        Clln c = { i, (x*x + y*y), x, y, 1 };
        cllns[i] = c;
        for (Clln &o : cllns) {
            if (o.ind == -1 || o.ind == i) continue;
            Dist dd = { c.dist_to(o), o.ind, i };
            dsts.push(dd);
        }
    }

    int ci = n;

    while (!dsts.empty()) {
        Dist cd = dsts.top(); dsts.pop();
        if (used[cd.ai] || used[cd.bi]) continue;
        cout << (cllns[cd.ai].sz + cllns[cd.bi].sz) << '\n';

        Clln nc = { 
            ci,
            cllns[cd.ai].sqr + cllns[cd.bi].sqr,
            cllns[cd.ai].sumx + cllns[cd.bi].sumx,
            cllns[cd.ai].sumy + cllns[cd.bi].sumy,
            cllns[cd.ai].sz + cllns[cd.bi].sz,
        };
        cllns[ci] = nc;
        ci++;
        used[cd.ai] = used[cd.bi] = 1;

        for (Clln &o : cllns) {
            if (o.ind == -1 || o.ind == nc.ind || used[o.ind]) continue;
            Dist dd = { nc.dist_to(o), o.ind, nc.ind };
            dsts.push(dd);
        }
    }
}

Details

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Test #1:

score: 100
Accepted
time: 2ms
memory: 3400kb

input:

2
0 0
1 0

output:

2

result:

ok single line: '2'

Test #2:

score: -100
Wrong Answer
time: 1756ms
memory: 102144kb

input:

2000
1000 -1000
1000 -999
1000 -998
1000 -997
1000 -996
1000 -995
1000 -994
1000 -993
1000 -992
1000 -991
1000 -990
1000 -989
1000 -988
1000 -987
1000 -986
1000 -985
1000 -984
1000 -983
1000 -982
1000 -981
1000 -980
1000 -979
1000 -978
1000 -977
1000 -976
1000 -975
1000 -974
1000 -973
1000 -972
1000...

output:

2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
10...

result:

wrong answer 2nd lines differ - expected: '2', found: '3'