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Submission #788443

# Submission time Handle Problem Language Result Execution time Memory
788443 2023-07-20T08:40:12 Z alexander707070 Fountain Parks (IOI21_parks) C++17
30 / 100
 123 ms 26312 KB 
#include<bits/stdc++.h>
#include "parks.h"
#define MAXN 200007
using namespace std;

struct bench{
    int from,to;
    int a,b;
};

int L,M,R;
int n,dsu[MAXN],up[MAXN],down[MAXN],curr;
vector< pair<int,int> > l,m,r;
vector<bench> sol;
vector<int> A,B,C,D;

int root(int x){
    if(dsu[x]==x)return x;
    dsu[x]=root(dsu[x]);
    return dsu[x];
}

void mergev(int x,int y){
    dsu[root(x)]=root(y);
}

int construct_roads(vector<int> x,vector<int> y){
    n=int(x.size());

    for(int i=0;i<n;i++){
        dsu[i]=i;

        if(x[i]==2){
            l.push_back({y[i],i});
            down[y[i]]=i+1;
        }
        if(x[i]==4)m.push_back({y[i],i});
        if(x[i]==6){
            r.push_back({y[i],i});
            up[y[i]]=i+1;
        }
    }

    sort(l.begin(),l.end());
    sort(m.begin(),m.end());
    sort(r.begin(),r.end());

    L=int(l.size()); M=int(m.size()); R=int(r.size());

    for(int i=0;i<L-1;i++){
        if(l[i].first+2==l[i+1].first){
            mergev(l[i].second,l[i+1].second);
            sol.push_back({l[i].second,l[i+1].second,1,l[i].first+1});
        }
    }

    for(int i=0;i<R-1;i++){
        if(r[i].first+2==r[i+1].first){
            mergev(r[i].second,r[i+1].second);
            sol.push_back({r[i].second,r[i+1].second,7,r[i].first+1});
        }
    }

    for(int i=0;i<M-1;i++){
        if(m[i].first+2==m[i+1].first){
            mergev(m[i].second,m[i+1].second);
            if(m[i].first%4==0)sol.push_back({m[i].second,m[i+1].second,3,m[i].first+1});
            if(m[i].first%4==2)sol.push_back({m[i].second,m[i+1].second,5,m[i].first+1});
        }
    }

    for(int i=0;i<M;i++){
        if(down[m[i].first]!=0){
            curr=down[m[i].first]-1;
            if(root(curr)==root(m[i].second))continue;

            mergev(curr,m[i].second);
            if(m[i].first%4==0)sol.push_back({curr,m[i].second,3,m[i].first-1});
            if(m[i].first%4==2)sol.push_back({curr,m[i].second,3,m[i].first+1});
        }
    }

    for(int i=0;i<M;i++){
        if(up[m[i].first]!=0){
            curr=up[m[i].first]-1;
            if(root(curr)==root(m[i].second))continue;

            mergev(curr,m[i].second);
            if(m[i].first%4==0)sol.push_back({m[i].second,curr,5,m[i].first+1});
            if(m[i].first%4==2)sol.push_back({m[i].second,curr,5,m[i].first-1});
        }
    }

    for(int i=0;i<n;i++){
        if(root(i)!=root(0))return 0;
    }

    for(int i=0;i<sol.size();i++){
        A.push_back(sol[i].from);
        B.push_back(sol[i].to);
        C.push_back(sol[i].a);
        D.push_back(sol[i].b);
    }

    build(A,B,C,D);
    return 1;
}

/*
int main(){
    construct_roads({4, 4, 6, 4, 2}, {4, 6, 4, 2, 4});
}
*/

Compilation message

parks.cpp: In function 'int construct_roads(std::vector<int>, std::vector<int>)':
parks.cpp:98:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<bench>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   98 |     for(int i=0;i<sol.size();i++){
      |                 ~^~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 304 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 55 ms 13708 KB Output is correct
10 Correct 5 ms 1744 KB Output is correct
11 Correct 24 ms 7512 KB Output is correct
12 Correct 8 ms 2384 KB Output is correct
13 Correct 8 ms 3404 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 52 ms 13164 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 304 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 55 ms 13708 KB Output is correct
10 Correct 5 ms 1744 KB Output is correct
11 Correct 24 ms 7512 KB Output is correct
12 Correct 8 ms 2384 KB Output is correct
13 Correct 8 ms 3404 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 52 ms 13164 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 112 ms 25512 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 1 ms 468 KB Output is correct
26 Correct 1 ms 468 KB Output is correct
27 Correct 1 ms 576 KB Output is correct
28 Correct 41 ms 10528 KB Output is correct
29 Correct 61 ms 15032 KB Output is correct
30 Correct 87 ms 20996 KB Output is correct
31 Correct 105 ms 25484 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 1 ms 212 KB Output is correct
34 Correct 0 ms 308 KB Output is correct
35 Correct 1 ms 212 KB Output is correct
36 Correct 0 ms 304 KB Output is correct
37 Correct 1 ms 340 KB Output is correct
38 Correct 1 ms 212 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 1 ms 212 KB Output is correct
41 Correct 1 ms 212 KB Output is correct
42 Correct 1 ms 212 KB Output is correct
43 Correct 1 ms 468 KB Output is correct
44 Correct 1 ms 572 KB Output is correct
45 Correct 51 ms 12372 KB Output is correct
46 Correct 80 ms 18776 KB Output is correct
47 Correct 76 ms 18692 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 304 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 55 ms 13708 KB Output is correct
10 Correct 5 ms 1744 KB Output is correct
11 Correct 24 ms 7512 KB Output is correct
12 Correct 8 ms 2384 KB Output is correct
13 Correct 8 ms 3404 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 52 ms 13164 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 112 ms 25512 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 1 ms 468 KB Output is correct
26 Correct 1 ms 468 KB Output is correct
27 Correct 1 ms 576 KB Output is correct
28 Correct 41 ms 10528 KB Output is correct
29 Correct 61 ms 15032 KB Output is correct
30 Correct 87 ms 20996 KB Output is correct
31 Correct 105 ms 25484 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 1 ms 212 KB Output is correct
34 Correct 0 ms 308 KB Output is correct
35 Correct 1 ms 212 KB Output is correct
36 Correct 0 ms 304 KB Output is correct
37 Correct 1 ms 340 KB Output is correct
38 Correct 1 ms 212 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 1 ms 212 KB Output is correct
41 Correct 1 ms 212 KB Output is correct
42 Correct 1 ms 212 KB Output is correct
43 Correct 1 ms 468 KB Output is correct
44 Correct 1 ms 572 KB Output is correct
45 Correct 51 ms 12372 KB Output is correct
46 Correct 80 ms 18776 KB Output is correct
47 Correct 76 ms 18692 KB Output is correct
48 Correct 1 ms 212 KB Output is correct
49 Correct 1 ms 212 KB Output is correct
50 Correct 0 ms 212 KB Output is correct
51 Correct 1 ms 212 KB Output is correct
52 Correct 1 ms 212 KB Output is correct
53 Correct 1 ms 256 KB Output is correct
54 Correct 0 ms 212 KB Output is correct
55 Correct 104 ms 25228 KB Output is correct
56 Correct 1 ms 212 KB Output is correct
57 Correct 1 ms 448 KB Output is correct
58 Correct 3 ms 1108 KB Output is correct
59 Correct 3 ms 1108 KB Output is correct
60 Correct 49 ms 12528 KB Output is correct
61 Correct 70 ms 17908 KB Output is correct
62 Correct 90 ms 21544 KB Output is correct
63 Correct 123 ms 25360 KB Output is correct
64 Correct 1 ms 212 KB Output is correct
65 Correct 1 ms 212 KB Output is correct
66 Correct 1 ms 212 KB Output is correct
67 Correct 104 ms 25868 KB Output is correct
68 Correct 108 ms 26312 KB Output is correct
69 Correct 103 ms 25528 KB Output is correct
70 Correct 2 ms 596 KB Output is correct
71 Correct 3 ms 980 KB Output is correct
72 Correct 50 ms 12448 KB Output is correct
73 Correct 86 ms 19668 KB Output is correct
74 Correct 108 ms 25064 KB Output is correct
75 Correct 105 ms 25612 KB Output is correct
76 Correct 104 ms 26240 KB Output is correct
77 Correct 2 ms 724 KB Output is correct
78 Correct 3 ms 1108 KB Output is correct
79 Correct 50 ms 12288 KB Output is correct
80 Correct 90 ms 19484 KB Output is correct
81 Correct 118 ms 24916 KB Output is correct

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 304 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 55 ms 13708 KB Output is correct
10 Correct 5 ms 1744 KB Output is correct
11 Correct 24 ms 7512 KB Output is correct
12 Correct 8 ms 2384 KB Output is correct
13 Correct 8 ms 3404 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 52 ms 13164 KB Output is correct
17 Incorrect 1 ms 212 KB Solution announced impossible, but it is possible.
18 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 304 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 55 ms 13708 KB Output is correct
10 Correct 5 ms 1744 KB Output is correct
11 Correct 24 ms 7512 KB Output is correct
12 Correct 8 ms 2384 KB Output is correct
13 Correct 8 ms 3404 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 52 ms 13164 KB Output is correct
17 Incorrect 36 ms 8508 KB Solution announced impossible, but it is possible.
18 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 304 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 55 ms 13708 KB Output is correct
10 Correct 5 ms 1744 KB Output is correct
11 Correct 24 ms 7512 KB Output is correct
12 Correct 8 ms 2384 KB Output is correct
13 Correct 8 ms 3404 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 52 ms 13164 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 112 ms 25512 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 1 ms 468 KB Output is correct
26 Correct 1 ms 468 KB Output is correct
27 Correct 1 ms 576 KB Output is correct
28 Correct 41 ms 10528 KB Output is correct
29 Correct 61 ms 15032 KB Output is correct
30 Correct 87 ms 20996 KB Output is correct
31 Correct 105 ms 25484 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 1 ms 212 KB Output is correct
34 Correct 0 ms 308 KB Output is correct
35 Correct 1 ms 212 KB Output is correct
36 Correct 0 ms 304 KB Output is correct
37 Correct 1 ms 340 KB Output is correct
38 Correct 1 ms 212 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 1 ms 212 KB Output is correct
41 Correct 1 ms 212 KB Output is correct
42 Correct 1 ms 212 KB Output is correct
43 Correct 1 ms 468 KB Output is correct
44 Correct 1 ms 572 KB Output is correct
45 Correct 51 ms 12372 KB Output is correct
46 Correct 80 ms 18776 KB Output is correct
47 Correct 76 ms 18692 KB Output is correct
48 Correct 1 ms 212 KB Output is correct
49 Correct 1 ms 212 KB Output is correct
50 Correct 0 ms 212 KB Output is correct
51 Correct 1 ms 212 KB Output is correct
52 Correct 1 ms 212 KB Output is correct
53 Correct 1 ms 256 KB Output is correct
54 Correct 0 ms 212 KB Output is correct
55 Correct 104 ms 25228 KB Output is correct
56 Correct 1 ms 212 KB Output is correct
57 Correct 1 ms 448 KB Output is correct
58 Correct 3 ms 1108 KB Output is correct
59 Correct 3 ms 1108 KB Output is correct
60 Correct 49 ms 12528 KB Output is correct
61 Correct 70 ms 17908 KB Output is correct
62 Correct 90 ms 21544 KB Output is correct
63 Correct 123 ms 25360 KB Output is correct
64 Correct 1 ms 212 KB Output is correct
65 Correct 1 ms 212 KB Output is correct
66 Correct 1 ms 212 KB Output is correct
67 Correct 104 ms 25868 KB Output is correct
68 Correct 108 ms 26312 KB Output is correct
69 Correct 103 ms 25528 KB Output is correct
70 Correct 2 ms 596 KB Output is correct
71 Correct 3 ms 980 KB Output is correct
72 Correct 50 ms 12448 KB Output is correct
73 Correct 86 ms 19668 KB Output is correct
74 Correct 108 ms 25064 KB Output is correct
75 Correct 105 ms 25612 KB Output is correct
76 Correct 104 ms 26240 KB Output is correct
77 Correct 2 ms 724 KB Output is correct
78 Correct 3 ms 1108 KB Output is correct
79 Correct 50 ms 12288 KB Output is correct
80 Correct 90 ms 19484 KB Output is correct
81 Correct 118 ms 24916 KB Output is correct
82 Incorrect 1 ms 212 KB Solution announced impossible, but it is possible.
83 Halted 0 ms 0 KB -