oj.uz

Submission #72816

# Submission time Handle Problem Language Result Execution time Memory
72816 2018-08-27T03:03:34 Z funcsr Simurgh (IOI17_simurgh) C++17
51 / 100
 192 ms 6568 KB 
#include "simurgh.h"
#include <iostream>
#include <vector>
#include <algorithm>
#include <queue>
#include <cmath>
#include <cassert>
using namespace std;
#define rep(i,n)for (int i=0; i<(n); i++)
#define all(x) (x).begin(), (x).end()
#define pb push_back
#define _1 first
#define _2 second
#define INF 1145141919
typedef pair<int, int> P;

vector<int> R[500];
struct UF {
  int U[500];
  int find(int x){
    if(U[x]==x)return x;
    return U[x]=find(U[x]);
  }
  void unite(int x, int y) {
    x=find(x), y=find(y);
    if(x==y)return;
    U[x]=y;
  }
  bool same(int x, int y) { return find(x)==find(y);}
};


int M;
bool G[500][500];
int ID[500][500];
int ret[500][500];

vector<int> find_roads(int N, vector<int> U, vector<int> V) {

  M = U.size();
  rep(i, M) G[U[i]][V[i]] = G[V[i]][U[i]] = true;
  rep(i, M) ID[U[i]][V[i]] = ID[V[i]][U[i]] = i;
  rep(i, N) rep(j, N) ret[i][j] = -1;

  UF uf;
  rep(x, N) {
    rep(i, N) uf.U[i] = i, R[i].clear();
    vector<int> cand;
    vector<int> def;
    rep(i, M) {
      if (V[i] == x) swap(U[i], V[i]);

      if (U[i] == x) cand.pb(V[i]);
      else {
        if (!uf.same(U[i], V[i])) {
          uf.unite(U[i], V[i]);
          def.pb(i);
        }
      }
    }
    //cout<<"x="<<x<<": def.size()="<<def.size()<<"\n";
    //cout<<"cand={";for (int  t:cand)cout<<t<<",";cout<<"}\n";

    for (int t : cand) if (ret[x][t] != -1) R[uf.find(t)].pb(t);
    for (int t : cand) if (ret[x][t] == -1) R[uf.find(t)].pb(t);

    vector<int> rdef(def);
    rep(i, N) if (!R[i].empty()) rdef.pb(ID[x][R[i][0]]);
    assert(rdef.size()==N-1);
    int cr = count_common_roads(rdef);
    //cout<<"cr="<<cr<<"\n";

    rep(i, N) if (!R[i].empty()) {
      if (R[i].size() == 1) {
        int t = R[i][0];
        assert(ret[x][t] != 0);
        ret[x][t] = ret[t][x] = 1;
        continue;
      }
      vector<int> r(def);
      rep(other, N) if (i!=other &&!R[other].empty()) r.pb(ID[x][R[other][0]]);
      r.pb(-1);
      int moto = R[i][0];
      int max_r = cr;
      vector<P> ps;
      ps.pb(P(moto, cr));
      for (int j=1; j<R[i].size(); j++) {
        int t = R[i][j];
        if (ret[x][t] != -1) {
          assert(ret[x][moto] != -1);
          max_r = max(max_r, cr-ret[x][moto]+ret[x][t]);
        }
        else {
          r.pop_back();
          r.pb(ID[x][t]);
          assert(r.size()==N-1);
          int res = count_common_roads(r);
          max_r = max(max_r, res);
          ps.pb(P(t, res));
        }
      }
      for (P p : ps) {
        int t = p._1, c = p._2;
        if (c == max_r) {
          //cout<<x<<"<->"<<t<<": yes\n";
          // 1
          ret[x][t] = ret[t][x] = 1;
        }
        else {
          // 0
          ret[x][t] = ret[t][x] = 0;
        }
      }
    }
  }

  vector<int> r;
  rep(i, N) rep(j, i) if (ret[i][j]==1) r.pb(ID[i][j]);
  assert(r.size() == N-1);
  //assert(count_common_roads(r) == N-1);
  return r;
}

Compilation message

In file included from /usr/include/c++/7/cassert:44:0,
                 from simurgh.cpp:7:
simurgh.cpp: In function 'std::vector<int> find_roads(int, std::vector<int>, std::vector<int>)':
simurgh.cpp:69:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     assert(rdef.size()==N-1);
            ~~~~~~~~~~~^~~~~
simurgh.cpp:87:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
       for (int j=1; j<R[i].size(); j++) {
                     ~^~~~~~~~~~~~
In file included from /usr/include/c++/7/cassert:44:0,
                 from simurgh.cpp:7:
simurgh.cpp:96:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
           assert(r.size()==N-1);
                  ~~~~~~~~^~~~~
simurgh.cpp:119:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   assert(r.size() == N-1);
          ~~~~~~~~~^~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB correct
2 Correct 2 ms 464 KB correct
3 Correct 4 ms 540 KB correct
4 Correct 3 ms 636 KB correct
5 Correct 3 ms 636 KB correct
6 Correct 3 ms 636 KB correct
7 Correct 2 ms 636 KB correct
8 Correct 2 ms 636 KB correct
9 Correct 3 ms 636 KB correct
10 Correct 2 ms 636 KB correct
11 Correct 2 ms 636 KB correct
12 Correct 2 ms 636 KB correct
13 Correct 3 ms 636 KB correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB correct
2 Correct 2 ms 464 KB correct
3 Correct 4 ms 540 KB correct
4 Correct 3 ms 636 KB correct
5 Correct 3 ms 636 KB correct
6 Correct 3 ms 636 KB correct
7 Correct 2 ms 636 KB correct
8 Correct 2 ms 636 KB correct
9 Correct 3 ms 636 KB correct
10 Correct 2 ms 636 KB correct
11 Correct 2 ms 636 KB correct
12 Correct 2 ms 636 KB correct
13 Correct 3 ms 636 KB correct
14 Correct 4 ms 936 KB correct
15 Correct 4 ms 936 KB correct
16 Correct 5 ms 936 KB correct
17 Correct 5 ms 936 KB correct
18 Correct 3 ms 936 KB correct
19 Correct 6 ms 1108 KB correct
20 Correct 5 ms 1108 KB correct
21 Correct 5 ms 1108 KB correct
22 Correct 4 ms 1108 KB correct
23 Correct 4 ms 1108 KB correct
24 Correct 4 ms 1108 KB correct
25 Correct 3 ms 1108 KB correct
26 Correct 5 ms 1108 KB correct
27 Correct 5 ms 1108 KB correct
28 Correct 3 ms 1108 KB correct
29 Correct 4 ms 1108 KB correct
30 Correct 4 ms 1108 KB correct
31 Correct 5 ms 1108 KB correct
32 Correct 4 ms 1108 KB correct
33 Correct 4 ms 1108 KB correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB correct
2 Correct 2 ms 464 KB correct
3 Correct 4 ms 540 KB correct
4 Correct 3 ms 636 KB correct
5 Correct 3 ms 636 KB correct
6 Correct 3 ms 636 KB correct
7 Correct 2 ms 636 KB correct
8 Correct 2 ms 636 KB correct
9 Correct 3 ms 636 KB correct
10 Correct 2 ms 636 KB correct
11 Correct 2 ms 636 KB correct
12 Correct 2 ms 636 KB correct
13 Correct 3 ms 636 KB correct
14 Correct 4 ms 936 KB correct
15 Correct 4 ms 936 KB correct
16 Correct 5 ms 936 KB correct
17 Correct 5 ms 936 KB correct
18 Correct 3 ms 936 KB correct
19 Correct 6 ms 1108 KB correct
20 Correct 5 ms 1108 KB correct
21 Correct 5 ms 1108 KB correct
22 Correct 4 ms 1108 KB correct
23 Correct 4 ms 1108 KB correct
24 Correct 4 ms 1108 KB correct
25 Correct 3 ms 1108 KB correct
26 Correct 5 ms 1108 KB correct
27 Correct 5 ms 1108 KB correct
28 Correct 3 ms 1108 KB correct
29 Correct 4 ms 1108 KB correct
30 Correct 4 ms 1108 KB correct
31 Correct 5 ms 1108 KB correct
32 Correct 4 ms 1108 KB correct
33 Correct 4 ms 1108 KB correct
34 Correct 182 ms 2636 KB correct
35 Correct 169 ms 2764 KB correct
36 Correct 131 ms 2764 KB correct
37 Correct 16 ms 2764 KB correct
38 Correct 181 ms 3236 KB correct
39 Correct 150 ms 3236 KB correct
40 Correct 126 ms 3368 KB correct
41 Correct 181 ms 3672 KB correct
42 Correct 192 ms 3880 KB correct
43 Correct 132 ms 3888 KB correct
44 Correct 94 ms 3888 KB correct
45 Correct 112 ms 3888 KB correct
46 Correct 80 ms 3928 KB correct
47 Correct 39 ms 3928 KB correct
48 Correct 10 ms 3928 KB correct
49 Correct 15 ms 3928 KB correct
50 Correct 35 ms 3940 KB correct
51 Correct 95 ms 4208 KB correct
52 Correct 78 ms 4264 KB correct
53 Correct 69 ms 4280 KB correct
54 Correct 94 ms 4484 KB correct
55 Correct 84 ms 4592 KB correct
56 Correct 86 ms 4696 KB correct
57 Correct 85 ms 4696 KB correct

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4696 KB correct
2 Correct 2 ms 4696 KB correct
3 Incorrect 139 ms 6568 KB WA in grader: NO
4 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB correct
2 Correct 2 ms 464 KB correct
3 Correct 4 ms 540 KB correct
4 Correct 3 ms 636 KB correct
5 Correct 3 ms 636 KB correct
6 Correct 3 ms 636 KB correct
7 Correct 2 ms 636 KB correct
8 Correct 2 ms 636 KB correct
9 Correct 3 ms 636 KB correct
10 Correct 2 ms 636 KB correct
11 Correct 2 ms 636 KB correct
12 Correct 2 ms 636 KB correct
13 Correct 3 ms 636 KB correct
14 Correct 4 ms 936 KB correct
15 Correct 4 ms 936 KB correct
16 Correct 5 ms 936 KB correct
17 Correct 5 ms 936 KB correct
18 Correct 3 ms 936 KB correct
19 Correct 6 ms 1108 KB correct
20 Correct 5 ms 1108 KB correct
21 Correct 5 ms 1108 KB correct
22 Correct 4 ms 1108 KB correct
23 Correct 4 ms 1108 KB correct
24 Correct 4 ms 1108 KB correct
25 Correct 3 ms 1108 KB correct
26 Correct 5 ms 1108 KB correct
27 Correct 5 ms 1108 KB correct
28 Correct 3 ms 1108 KB correct
29 Correct 4 ms 1108 KB correct
30 Correct 4 ms 1108 KB correct
31 Correct 5 ms 1108 KB correct
32 Correct 4 ms 1108 KB correct
33 Correct 4 ms 1108 KB correct
34 Correct 182 ms 2636 KB correct
35 Correct 169 ms 2764 KB correct
36 Correct 131 ms 2764 KB correct
37 Correct 16 ms 2764 KB correct
38 Correct 181 ms 3236 KB correct
39 Correct 150 ms 3236 KB correct
40 Correct 126 ms 3368 KB correct
41 Correct 181 ms 3672 KB correct
42 Correct 192 ms 3880 KB correct
43 Correct 132 ms 3888 KB correct
44 Correct 94 ms 3888 KB correct
45 Correct 112 ms 3888 KB correct
46 Correct 80 ms 3928 KB correct
47 Correct 39 ms 3928 KB correct
48 Correct 10 ms 3928 KB correct
49 Correct 15 ms 3928 KB correct
50 Correct 35 ms 3940 KB correct
51 Correct 95 ms 4208 KB correct
52 Correct 78 ms 4264 KB correct
53 Correct 69 ms 4280 KB correct
54 Correct 94 ms 4484 KB correct
55 Correct 84 ms 4592 KB correct
56 Correct 86 ms 4696 KB correct
57 Correct 85 ms 4696 KB correct
58 Correct 3 ms 4696 KB correct
59 Correct 2 ms 4696 KB correct
60 Incorrect 139 ms 6568 KB WA in grader: NO
61 Halted 0 ms 0 KB -