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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#97604#5251. ConstellationsksunhokimWA 2165ms143748kbC++201.6kb2023-04-17 12:23:022023-04-17 12:23:33

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.
  • [2023-04-17 12:23:33]
  • 评测
  • 测评结果:WA
  • 用时:2165ms
  • 内存:143748kb
  • [2023-04-17 12:23:02]
  • 提交

answer

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

// Union Find using disjoint subset union
struct union_find {
  int n;
  vector<int> p;
  vector<int> sz;
  union_find(int n) : n(n), p(n), sz(n, 1) {
    iota(begin(p),end(p), 0);
  }
  int leader(int x) {
    if (p[x] == x)
      return x;
    return p[x] = leader(p[x]);
  }
  void unite(int x, int y) {
    int l = leader(x), s = leader(y);
    if (l == s) return;
    if (sz[s] > sz[l]) swap(s,l);
    p[s] = l, sz[l] += sz[s];
  }
};

int main() {
  cin.tie(nullptr)->sync_with_stdio(false);

  int n;
  cin >> n;
  vector<pair<int,int>> A(n);
  for (int i=0;i<n;i++){
    cin >> A[i].first >> A[i].second;
  }

  auto get_dist = [&](pair<int,int> a, pair<int, int> b) {
    ll dx = (ll)a.first-b.first;
    ll dy = (ll)a.second-b.second;
    return dx*dx + dy*dy;
  };
  
  set<tuple<ll,int,int>> pq;
  for (int i=0;i<n;i++){
    for (int j=i+1;j<n;j++){
      pq.insert({get_dist(A[i],A[j]),i,j});
    }
  }

  vector<vector<int>> edges(n, vector<int>(n));
  union_find uf(n);

  for (auto [d,i,j] : pq) {
    int u = uf.leader(i), v = uf.leader(j);
    if (u == v) continue;
    edges[u][v]++;
    edges[v][u]++;
    if (edges[u][v] == uf.sz[u]*uf.sz[v]) {
      uf.unite(u,v);
      int nw = uf.leader(u);
      int old = u == nw ? v : u;
      for (int i=0;i<n;i++){
        if (i == old || i == nw) continue;
        edges[i][nw] += edges[i][old];
        edges[nw][i] += edges[old][i];
      }
      cout << uf.sz[nw] << "\n";
    }
  }
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 2ms
memory: 3396kb

input:

2
0 0
1 0

output:

2

result:

ok single line: '2'

Test #2:

score: 0
Accepted
time: 636ms
memory: 143748kb

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
2
2
2
2
2
2
2
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2
2
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2
2
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2
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2
2
2
2
2
2
2
...

result:

ok 1999 lines

Test #3:

score: 0
Accepted
time: 650ms
memory: 143744kb

input:

2000
-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
-971...

output:

2
2
2
2
2
2
2
2
2
2
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2
2
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2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
...

result:

ok 1999 lines

Test #4:

score: 0
Accepted
time: 639ms
memory: 143700kb

input:

2000
-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 -10...

output:

2
2
2
2
2
2
2
2
2
2
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2
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2
2
2
2
2
...

result:

ok 1999 lines

Test #5:

score: 0
Accepted
time: 601ms
memory: 143632kb

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 -9...

output:

2
2
2
2
2
2
2
2
2
2
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2
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2
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2
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2
2
2
2
2
2
2
2
...

result:

ok 1999 lines

Test #6:

score: 0
Accepted
time: 1425ms
memory: 143616kb

input:

2000
1000 -250
1000 -249
1000 -248
1000 -247
1000 -246
1000 -245
1000 -244
1000 -243
1000 -242
1000 -241
1000 -240
1000 -239
1000 -238
1000 -237
1000 -236
1000 -235
1000 -234
1000 -233
1000 -232
1000 -231
1000 -230
1000 -229
1000 -228
1000 -227
1000 -226
1000 -225
1000 -224
1000 -223
1000 -222
1000 ...

output:

2
2
2
2
2
2
2
2
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2
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2
...

result:

ok 1999 lines

Test #7:

score: 0
Accepted
time: 658ms
memory: 143748kb

input:

2000
0 -1000
0 -999
0 -998
0 -997
0 -996
0 -995
0 -994
0 -993
0 -992
0 -991
0 -990
0 -989
0 -988
0 -987
0 -986
0 -985
0 -984
0 -983
0 -982
0 -981
0 -980
0 -979
0 -978
0 -977
0 -976
0 -975
0 -974
0 -973
0 -972
0 -971
0 -970
0 -969
0 -968
0 -967
0 -966
0 -965
0 -964
0 -963
0 -962
0 -961
0 -960
0 -959
...

output:

2
2
2
2
2
2
2
2
2
2
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2
...

result:

ok 1999 lines

Test #8:

score: -100
Wrong Answer
time: 2165ms
memory: 143588kb

input:

2000
-400 571
-725 636
-880 529
-657 372
-383 382
-746 888
-604 785
-497 557
-677 977
-562 917
-530 623
-636 535
-816 579
-633 428
-573 561
-496 479
-409 448
-570 379
-421 795
-827 865
-730 809
-423 984
-676 772
-398 816
-451 373
-756 777
-351 829
-954 345
-543 871
-595 521
-501 734
-378 769
-987 60...

output:

2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
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2
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2
2
3
2
2
...

result:

wrong answer 43rd lines differ - expected: '3', found: '2'