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Submission #803262

# Submission time Handle Problem Language Result Execution time Memory
803262 2023-08-03T02:41:08 Z vjudge1 Fountain Parks (IOI21_parks) C++17
15 / 100
 119 ms 27416 KB 
#include "parks.h"
#include<bits/stdc++.h>
using namespace std;
bitset<200100> have[8];
int at[8][200100];
int construct1(int row) {
    vector<int>u,v,x,y;
    int prev = 0;
    for(int i = 2; i <= 200000; i+=2) {
        if(have[row][i]) {
            if(prev) {
                if(i-prev>2)
                    return 0;
                u.push_back(at[row][i]);
                v.push_back(at[row][i-2]);
                x.push_back(row+1);
                y.push_back(i-1);
            }
            prev = i;
        }
    }
    build(u,v,x,y);
    return 1;
}
int p[200100];
int abp(int n) {
    if(p[n]==n) return n;
    return p[n]=abp(p[n]);
}
int n;
int construct2(int row1, int row2) {
    if(row2==6) return 0 ;
    int prev1 = 0, prev2 = 0;
    vector<pair<pair<int, int>, pair<int, int>>> edges;
    for(int i = 2; i <= 200000; i+=2) {
        if(have[row2][i]&&i>2){
            if(have[row2][i-2])
                edges.push_back({{at[row2][i], at[row2][i-2]}, {row2+1, i-1}});
        }
        if(have[row1][i]) {
            if(i>2) {
                if(have[row1][i-2])
                    edges.push_back({{at[row1][i], at[row1][i-2]}, {row1-1, i-1}});
            }
            if(have[row2][i])
                edges.push_back({{at[row1][i], at[row2][i]}, {row1+1, i-1}});
        }
    }
    iota(p,p+200100,0);
    vector<int> u,v,x,y;
    for(auto i: edges)
        u.push_back(i.first.first), v.push_back(i.first.second),x.push_back(i.second.first),y.push_back(i.second.second);
    int cnt = 0;
    for(int i = 0; i < edges.size(); i++)
        if(abp(u[i])!=abp(v[i]))
            p[p[u[i]]]=p[v[i]],cnt++;
    if(cnt!=n-1) return 0;
    build(u,v,x,y);
    return 1;
}
int construct_roads(vector<int> x, vector<int> y) {
    n = x.size();
    for(int i = 0; i < n; i++)
        have[x[i]][y[i]] = 1,at[x[i]][y[i]]=i;
    int a = have[2].count(), b = have[4].count(), c = have[6].count();
    if(!a&&!b) return construct1(6);
    if(!a&&!c) return construct1(4);
    if(!c&&!b) return construct1(2);
    if(!b) return 0;
    if(!c) return construct2(2,4);
    if(!a) return construct2(4,6);
    vector<pair<pair<int, int>, pair<int, int>>> edges,edges2;
    bool app=1;
    for(int i = 2; i <= 200000; i+=2) {
        if(have[6][i]&&have[6][i-2])
            edges.push_back({{at[6][i-2],at[6][i]}, {7,i-1}});
        if(have[4][i]){
            if(have[6][i]&&have[2][i]) app=0;
            if(have[6][i])
                edges.push_back({{at[4][i], at[6][i]}, {5, i+(app?1:-1)}}),app=1;
            if(have[4][i-2])
                edges2.push_back({{at[4][i], at[4][i-2]}, {3, i-1}});
        }
        if(have[2][i]) {
            if(have[2][i-2])
                edges.push_back({{at[2][i], at[2][i-2]}, {1, i-1}});
            if(have[4][i])
                edges.push_back({{at[2][i], at[4][i]}, {3, i+(app?1:-1)}}),app=1;
        }
    }
    for(auto i: edges2)
        edges.push_back(i);
    iota(p,p+200100,0);
    vector<int> u,v,X,Y;
    int cnt = 0;
    for(int i = 0; i < edges.size(); i++)
        if(abp(edges[i].first.first)!=abp(edges[i].first.second)){
            p[p[edges[i].first.first]]=p[edges[i].first.second],cnt++,
            u.push_back(edges[i].first.first), v.push_back(edges[i].first.second),
            X.push_back(edges[i].second.first), Y.push_back(edges[i].second.second);
            if(have[X.back()][Y.back()]) {
                X.back()+=2;
            }
            have[X.back()][Y.back()]=1;
        }
    if(u.size()!=n-1) return 0;
    build(u,v,X,Y);
    return 1;
}

Compilation message

parks.cpp: In function 'int construct2(int, int)':
parks.cpp:54:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<int, int>, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |     for(int i = 0; i < edges.size(); i++)
      |                    ~~^~~~~~~~~~~~~~
parks.cpp:33:9: warning: unused variable 'prev1' [-Wunused-variable]
   33 |     int prev1 = 0, prev2 = 0;
      |         ^~~~~
parks.cpp:33:20: warning: unused variable 'prev2' [-Wunused-variable]
   33 |     int prev1 = 0, prev2 = 0;
      |                    ^~~~~
parks.cpp: In function 'int construct_roads(std::vector<int>, std::vector<int>)':
parks.cpp:96:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<int, int>, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   96 |     for(int i = 0; i < edges.size(); i++)
      |                    ~~^~~~~~~~~~~~~~
parks.cpp:106:16: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  106 |     if(u.size()!=n-1) return 0;
      |        ~~~~~~~~^~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 40 ms 7484 KB Output is correct
10 Correct 5 ms 1236 KB Output is correct
11 Correct 22 ms 4172 KB Output is correct
12 Correct 6 ms 1620 KB Output is correct
13 Correct 6 ms 2132 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 41 ms 7476 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 40 ms 7484 KB Output is correct
10 Correct 5 ms 1236 KB Output is correct
11 Correct 22 ms 4172 KB Output is correct
12 Correct 6 ms 1620 KB Output is correct
13 Correct 6 ms 2132 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 41 ms 7476 KB Output is correct
17 Correct 1 ms 1108 KB Output is correct
18 Correct 1 ms 1108 KB Output is correct
19 Correct 1 ms 1108 KB Output is correct
20 Correct 1 ms 1108 KB Output is correct
21 Correct 1 ms 1108 KB Output is correct
22 Correct 1 ms 1108 KB Output is correct
23 Correct 119 ms 27400 KB Output is correct
24 Correct 1 ms 1108 KB Output is correct
25 Correct 2 ms 1236 KB Output is correct
26 Correct 1 ms 1364 KB Output is correct
27 Correct 2 ms 1492 KB Output is correct
28 Correct 45 ms 10564 KB Output is correct
29 Correct 83 ms 16224 KB Output is correct
30 Correct 93 ms 20216 KB Output is correct
31 Correct 119 ms 27416 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 1 ms 1108 KB Output is correct
34 Correct 1 ms 1108 KB Output is correct
35 Correct 1 ms 1108 KB Output is correct
36 Correct 1 ms 1108 KB Output is correct
37 Correct 1 ms 1108 KB Output is correct
38 Correct 1 ms 1108 KB Output is correct
39 Correct 1 ms 1108 KB Output is correct
40 Correct 1 ms 1108 KB Output is correct
41 Correct 2 ms 1108 KB Output is correct
42 Correct 1 ms 1108 KB Output is correct
43 Correct 1 ms 1236 KB Output is correct
44 Correct 1 ms 1364 KB Output is correct
45 Correct 43 ms 10436 KB Output is correct
46 Correct 64 ms 15384 KB Output is correct
47 Correct 65 ms 15424 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 40 ms 7484 KB Output is correct
10 Correct 5 ms 1236 KB Output is correct
11 Correct 22 ms 4172 KB Output is correct
12 Correct 6 ms 1620 KB Output is correct
13 Correct 6 ms 2132 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 41 ms 7476 KB Output is correct
17 Correct 1 ms 1108 KB Output is correct
18 Correct 1 ms 1108 KB Output is correct
19 Correct 1 ms 1108 KB Output is correct
20 Correct 1 ms 1108 KB Output is correct
21 Correct 1 ms 1108 KB Output is correct
22 Correct 1 ms 1108 KB Output is correct
23 Correct 119 ms 27400 KB Output is correct
24 Correct 1 ms 1108 KB Output is correct
25 Correct 2 ms 1236 KB Output is correct
26 Correct 1 ms 1364 KB Output is correct
27 Correct 2 ms 1492 KB Output is correct
28 Correct 45 ms 10564 KB Output is correct
29 Correct 83 ms 16224 KB Output is correct
30 Correct 93 ms 20216 KB Output is correct
31 Correct 119 ms 27416 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 1 ms 1108 KB Output is correct
34 Correct 1 ms 1108 KB Output is correct
35 Correct 1 ms 1108 KB Output is correct
36 Correct 1 ms 1108 KB Output is correct
37 Correct 1 ms 1108 KB Output is correct
38 Correct 1 ms 1108 KB Output is correct
39 Correct 1 ms 1108 KB Output is correct
40 Correct 1 ms 1108 KB Output is correct
41 Correct 2 ms 1108 KB Output is correct
42 Correct 1 ms 1108 KB Output is correct
43 Correct 1 ms 1236 KB Output is correct
44 Correct 1 ms 1364 KB Output is correct
45 Correct 43 ms 10436 KB Output is correct
46 Correct 64 ms 15384 KB Output is correct
47 Correct 65 ms 15424 KB Output is correct
48 Incorrect 1 ms 212 KB Solution announced impossible, but it is possible.
49 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 40 ms 7484 KB Output is correct
10 Correct 5 ms 1236 KB Output is correct
11 Correct 22 ms 4172 KB Output is correct
12 Correct 6 ms 1620 KB Output is correct
13 Correct 6 ms 2132 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 41 ms 7476 KB Output is correct
17 Runtime error 2 ms 340 KB Execution killed with signal 11
18 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 40 ms 7484 KB Output is correct
10 Correct 5 ms 1236 KB Output is correct
11 Correct 22 ms 4172 KB Output is correct
12 Correct 6 ms 1620 KB Output is correct
13 Correct 6 ms 2132 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 41 ms 7476 KB Output is correct
17 Runtime error 31 ms 6748 KB Execution killed with signal 11
18 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 40 ms 7484 KB Output is correct
10 Correct 5 ms 1236 KB Output is correct
11 Correct 22 ms 4172 KB Output is correct
12 Correct 6 ms 1620 KB Output is correct
13 Correct 6 ms 2132 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 41 ms 7476 KB Output is correct
17 Correct 1 ms 1108 KB Output is correct
18 Correct 1 ms 1108 KB Output is correct
19 Correct 1 ms 1108 KB Output is correct
20 Correct 1 ms 1108 KB Output is correct
21 Correct 1 ms 1108 KB Output is correct
22 Correct 1 ms 1108 KB Output is correct
23 Correct 119 ms 27400 KB Output is correct
24 Correct 1 ms 1108 KB Output is correct
25 Correct 2 ms 1236 KB Output is correct
26 Correct 1 ms 1364 KB Output is correct
27 Correct 2 ms 1492 KB Output is correct
28 Correct 45 ms 10564 KB Output is correct
29 Correct 83 ms 16224 KB Output is correct
30 Correct 93 ms 20216 KB Output is correct
31 Correct 119 ms 27416 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 1 ms 1108 KB Output is correct
34 Correct 1 ms 1108 KB Output is correct
35 Correct 1 ms 1108 KB Output is correct
36 Correct 1 ms 1108 KB Output is correct
37 Correct 1 ms 1108 KB Output is correct
38 Correct 1 ms 1108 KB Output is correct
39 Correct 1 ms 1108 KB Output is correct
40 Correct 1 ms 1108 KB Output is correct
41 Correct 2 ms 1108 KB Output is correct
42 Correct 1 ms 1108 KB Output is correct
43 Correct 1 ms 1236 KB Output is correct
44 Correct 1 ms 1364 KB Output is correct
45 Correct 43 ms 10436 KB Output is correct
46 Correct 64 ms 15384 KB Output is correct
47 Correct 65 ms 15424 KB Output is correct
48 Incorrect 1 ms 212 KB Solution announced impossible, but it is possible.
49 Halted 0 ms 0 KB -