oj.uz

Submission #227632

# Submission time Handle Problem Language Result Execution time Memory
227632 2020-04-28T07:54:58 Z MKopchev Port Facility (JOI17_port_facility) C++14
100 / 100
 2069 ms 163936 KB 
#include<bits/stdc++.h>
using namespace std;

const int nmax=1e6+42,mod=1e9+7;

int n;

int parent[nmax];

int root(int node)
{
    if(parent[node]==node)return node;
    parent[node]=root(parent[node]);
    return parent[node];
}

vector<int> adj[nmax];

int group[nmax];

void dfs(int node,int colour)
{
    if(group[node]==-1)group[node]=colour;
    else if(group[node]==colour)return;
    else
    {
        printf("0\n");
        exit(0);
    }

    for(auto k:adj[node])
        dfs(k,!colour);
}

void my_merge(int u,int v)
{
    //cout<<"my_merge "<<u<<" "<<v<<endl;

    adj[u].push_back(v);
    adj[v].push_back(u);

    u=root(u);
    v=root(v);

    parent[v]=u;
}

pair<int,int> inp[nmax];

stack< pair<int,int> > active[2];

bool simulate()
{
    for(int i=1;i<=n;i++)
    {
        int id=group[i];

        while(active[id].size()&&active[id].top().second<inp[i].first)active[id].pop();

        if(active[id].size()&&active[id].top().second<inp[i].second)return 0;

        active[id].push(inp[i]);
    }
    return 1;
}

set< pair<int/*right*/,int/*id*/> > builder;

int main()
{
    scanf("%i",&n);
    for(int i=1;i<=n;i++)scanf("%i%i",&inp[i].first,&inp[i].second);

    for(int i=1;i<=n;i++)group[i]=-1,parent[i]=i;

    sort(inp+1,inp+n+1);

    for(int i=1;i<=n;i++)
    {
        pair<int/*right*/,int/*id*/> cur={inp[i].second,i};

        //cout<<"inp: "<<inp[i].first<<" "<<inp[i].second<<endl;

        set< pair<int/*right*/,int/*id*/> >::iterator low=builder.lower_bound({inp[i].first,0}),up=builder.upper_bound({inp[i].second,nmax*2});

        if(low!=up)
        {
            up--;
            pair<int/*right*/,int/*id*/> prv=*up;

            //for(int j=1;j<=n;j++)cout<<root(j)<<" ";cout<<endl;

            while(root(i)!=root(prv.second))
            {
                my_merge((*low).second,i);
                low++;
            }
        }

        builder.insert(cur);
    }


    long long outp=1;

    for(int i=1;i<=n;i++)
        if(root(i)==i)
        {
            outp=outp*2%mod;
            dfs(i,0);
        }

    if(simulate()==0)printf("0\n");
    else printf("%lld\n",outp);

    return 0;
}

Compilation message

port_facility.cpp: In function 'int main()':
port_facility.cpp:71:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%i",&n);
     ~~~~~^~~~~~~~~
port_facility.cpp:72:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(int i=1;i<=n;i++)scanf("%i%i",&inp[i].first,&inp[i].second);
                          ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 23808 KB Output is correct
2 Correct 18 ms 23808 KB Output is correct
3 Correct 17 ms 23808 KB Output is correct
4 Correct 17 ms 23808 KB Output is correct
5 Correct 18 ms 23808 KB Output is correct
6 Correct 17 ms 23808 KB Output is correct
7 Correct 18 ms 23808 KB Output is correct
8 Correct 18 ms 23808 KB Output is correct
9 Correct 18 ms 23808 KB Output is correct
10 Correct 18 ms 23808 KB Output is correct
11 Correct 22 ms 23808 KB Output is correct
12 Correct 18 ms 23808 KB Output is correct
13 Correct 17 ms 23808 KB Output is correct
14 Correct 17 ms 23808 KB Output is correct
15 Correct 17 ms 23808 KB Output is correct
16 Correct 17 ms 23808 KB Output is correct
17 Correct 18 ms 23808 KB Output is correct
18 Correct 18 ms 24064 KB Output is correct
19 Correct 17 ms 23808 KB Output is correct
20 Correct 18 ms 23808 KB Output is correct
21 Correct 18 ms 23808 KB Output is correct
22 Correct 17 ms 23808 KB Output is correct
23 Correct 17 ms 23808 KB Output is correct
24 Correct 18 ms 23808 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 23808 KB Output is correct
2 Correct 18 ms 23808 KB Output is correct
3 Correct 17 ms 23808 KB Output is correct
4 Correct 17 ms 23808 KB Output is correct
5 Correct 18 ms 23808 KB Output is correct
6 Correct 17 ms 23808 KB Output is correct
7 Correct 18 ms 23808 KB Output is correct
8 Correct 18 ms 23808 KB Output is correct
9 Correct 18 ms 23808 KB Output is correct
10 Correct 18 ms 23808 KB Output is correct
11 Correct 22 ms 23808 KB Output is correct
12 Correct 18 ms 23808 KB Output is correct
13 Correct 17 ms 23808 KB Output is correct
14 Correct 17 ms 23808 KB Output is correct
15 Correct 17 ms 23808 KB Output is correct
16 Correct 17 ms 23808 KB Output is correct
17 Correct 18 ms 23808 KB Output is correct
18 Correct 18 ms 24064 KB Output is correct
19 Correct 17 ms 23808 KB Output is correct
20 Correct 18 ms 23808 KB Output is correct
21 Correct 18 ms 23808 KB Output is correct
22 Correct 17 ms 23808 KB Output is correct
23 Correct 17 ms 23808 KB Output is correct
24 Correct 18 ms 23808 KB Output is correct
25 Correct 18 ms 24064 KB Output is correct
26 Correct 19 ms 24064 KB Output is correct
27 Correct 19 ms 24064 KB Output is correct
28 Correct 19 ms 24064 KB Output is correct
29 Correct 24 ms 24064 KB Output is correct
30 Correct 20 ms 24064 KB Output is correct
31 Correct 19 ms 24064 KB Output is correct
32 Correct 19 ms 24064 KB Output is correct
33 Correct 19 ms 24064 KB Output is correct
34 Correct 19 ms 24064 KB Output is correct
35 Correct 18 ms 24064 KB Output is correct
36 Correct 19 ms 24064 KB Output is correct
37 Correct 19 ms 24064 KB Output is correct
38 Correct 19 ms 24064 KB Output is correct
39 Correct 18 ms 24064 KB Output is correct
40 Correct 18 ms 23936 KB Output is correct
41 Correct 19 ms 24064 KB Output is correct
42 Correct 19 ms 24064 KB Output is correct
43 Correct 19 ms 24064 KB Output is correct
44 Correct 19 ms 24064 KB Output is correct

Subtask #3
56.0 / 56.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 23808 KB Output is correct
2 Correct 18 ms 23808 KB Output is correct
3 Correct 17 ms 23808 KB Output is correct
4 Correct 17 ms 23808 KB Output is correct
5 Correct 18 ms 23808 KB Output is correct
6 Correct 17 ms 23808 KB Output is correct
7 Correct 18 ms 23808 KB Output is correct
8 Correct 18 ms 23808 KB Output is correct
9 Correct 18 ms 23808 KB Output is correct
10 Correct 18 ms 23808 KB Output is correct
11 Correct 22 ms 23808 KB Output is correct
12 Correct 18 ms 23808 KB Output is correct
13 Correct 17 ms 23808 KB Output is correct
14 Correct 17 ms 23808 KB Output is correct
15 Correct 17 ms 23808 KB Output is correct
16 Correct 17 ms 23808 KB Output is correct
17 Correct 18 ms 23808 KB Output is correct
18 Correct 18 ms 24064 KB Output is correct
19 Correct 17 ms 23808 KB Output is correct
20 Correct 18 ms 23808 KB Output is correct
21 Correct 18 ms 23808 KB Output is correct
22 Correct 17 ms 23808 KB Output is correct
23 Correct 17 ms 23808 KB Output is correct
24 Correct 18 ms 23808 KB Output is correct
25 Correct 18 ms 24064 KB Output is correct
26 Correct 19 ms 24064 KB Output is correct
27 Correct 19 ms 24064 KB Output is correct
28 Correct 19 ms 24064 KB Output is correct
29 Correct 24 ms 24064 KB Output is correct
30 Correct 20 ms 24064 KB Output is correct
31 Correct 19 ms 24064 KB Output is correct
32 Correct 19 ms 24064 KB Output is correct
33 Correct 19 ms 24064 KB Output is correct
34 Correct 19 ms 24064 KB Output is correct
35 Correct 18 ms 24064 KB Output is correct
36 Correct 19 ms 24064 KB Output is correct
37 Correct 19 ms 24064 KB Output is correct
38 Correct 19 ms 24064 KB Output is correct
39 Correct 18 ms 24064 KB Output is correct
40 Correct 18 ms 23936 KB Output is correct
41 Correct 19 ms 24064 KB Output is correct
42 Correct 19 ms 24064 KB Output is correct
43 Correct 19 ms 24064 KB Output is correct
44 Correct 19 ms 24064 KB Output is correct
45 Correct 113 ms 34612 KB Output is correct
46 Correct 114 ms 34680 KB Output is correct
47 Correct 117 ms 34500 KB Output is correct
48 Correct 117 ms 34808 KB Output is correct
49 Correct 119 ms 34552 KB Output is correct
50 Correct 107 ms 34296 KB Output is correct
51 Correct 110 ms 34680 KB Output is correct
52 Correct 99 ms 31352 KB Output is correct
53 Correct 104 ms 32276 KB Output is correct
54 Correct 99 ms 33640 KB Output is correct
55 Correct 101 ms 34932 KB Output is correct
56 Correct 103 ms 34804 KB Output is correct
57 Correct 108 ms 34424 KB Output is correct
58 Correct 104 ms 31480 KB Output is correct
59 Correct 97 ms 32120 KB Output is correct
60 Correct 115 ms 33528 KB Output is correct
61 Correct 114 ms 34040 KB Output is correct
62 Correct 90 ms 32760 KB Output is correct
63 Correct 105 ms 33400 KB Output is correct
64 Correct 106 ms 33788 KB Output is correct
65 Correct 133 ms 34680 KB Output is correct
66 Correct 131 ms 34680 KB Output is correct
67 Correct 115 ms 36340 KB Output is correct
68 Correct 110 ms 36340 KB Output is correct
69 Correct 112 ms 36088 KB Output is correct
70 Correct 109 ms 36152 KB Output is correct
71 Correct 109 ms 36468 KB Output is correct
72 Correct 116 ms 36608 KB Output is correct
73 Correct 112 ms 36208 KB Output is correct
74 Correct 112 ms 36336 KB Output is correct
75 Correct 121 ms 37624 KB Output is correct
76 Correct 126 ms 37728 KB Output is correct
77 Correct 121 ms 37624 KB Output is correct
78 Correct 116 ms 34808 KB Output is correct
79 Correct 118 ms 34552 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 23808 KB Output is correct
2 Correct 18 ms 23808 KB Output is correct
3 Correct 17 ms 23808 KB Output is correct
4 Correct 17 ms 23808 KB Output is correct
5 Correct 18 ms 23808 KB Output is correct
6 Correct 17 ms 23808 KB Output is correct
7 Correct 18 ms 23808 KB Output is correct
8 Correct 18 ms 23808 KB Output is correct
9 Correct 18 ms 23808 KB Output is correct
10 Correct 18 ms 23808 KB Output is correct
11 Correct 22 ms 23808 KB Output is correct
12 Correct 18 ms 23808 KB Output is correct
13 Correct 17 ms 23808 KB Output is correct
14 Correct 17 ms 23808 KB Output is correct
15 Correct 17 ms 23808 KB Output is correct
16 Correct 17 ms 23808 KB Output is correct
17 Correct 18 ms 23808 KB Output is correct
18 Correct 18 ms 24064 KB Output is correct
19 Correct 17 ms 23808 KB Output is correct
20 Correct 18 ms 23808 KB Output is correct
21 Correct 18 ms 23808 KB Output is correct
22 Correct 17 ms 23808 KB Output is correct
23 Correct 17 ms 23808 KB Output is correct
24 Correct 18 ms 23808 KB Output is correct
25 Correct 18 ms 24064 KB Output is correct
26 Correct 19 ms 24064 KB Output is correct
27 Correct 19 ms 24064 KB Output is correct
28 Correct 19 ms 24064 KB Output is correct
29 Correct 24 ms 24064 KB Output is correct
30 Correct 20 ms 24064 KB Output is correct
31 Correct 19 ms 24064 KB Output is correct
32 Correct 19 ms 24064 KB Output is correct
33 Correct 19 ms 24064 KB Output is correct
34 Correct 19 ms 24064 KB Output is correct
35 Correct 18 ms 24064 KB Output is correct
36 Correct 19 ms 24064 KB Output is correct
37 Correct 19 ms 24064 KB Output is correct
38 Correct 19 ms 24064 KB Output is correct
39 Correct 18 ms 24064 KB Output is correct
40 Correct 18 ms 23936 KB Output is correct
41 Correct 19 ms 24064 KB Output is correct
42 Correct 19 ms 24064 KB Output is correct
43 Correct 19 ms 24064 KB Output is correct
44 Correct 19 ms 24064 KB Output is correct
45 Correct 113 ms 34612 KB Output is correct
46 Correct 114 ms 34680 KB Output is correct
47 Correct 117 ms 34500 KB Output is correct
48 Correct 117 ms 34808 KB Output is correct
49 Correct 119 ms 34552 KB Output is correct
50 Correct 107 ms 34296 KB Output is correct
51 Correct 110 ms 34680 KB Output is correct
52 Correct 99 ms 31352 KB Output is correct
53 Correct 104 ms 32276 KB Output is correct
54 Correct 99 ms 33640 KB Output is correct
55 Correct 101 ms 34932 KB Output is correct
56 Correct 103 ms 34804 KB Output is correct
57 Correct 108 ms 34424 KB Output is correct
58 Correct 104 ms 31480 KB Output is correct
59 Correct 97 ms 32120 KB Output is correct
60 Correct 115 ms 33528 KB Output is correct
61 Correct 114 ms 34040 KB Output is correct
62 Correct 90 ms 32760 KB Output is correct
63 Correct 105 ms 33400 KB Output is correct
64 Correct 106 ms 33788 KB Output is correct
65 Correct 133 ms 34680 KB Output is correct
66 Correct 131 ms 34680 KB Output is correct
67 Correct 115 ms 36340 KB Output is correct
68 Correct 110 ms 36340 KB Output is correct
69 Correct 112 ms 36088 KB Output is correct
70 Correct 109 ms 36152 KB Output is correct
71 Correct 109 ms 36468 KB Output is correct
72 Correct 116 ms 36608 KB Output is correct
73 Correct 112 ms 36208 KB Output is correct
74 Correct 112 ms 36336 KB Output is correct
75 Correct 121 ms 37624 KB Output is correct
76 Correct 126 ms 37728 KB Output is correct
77 Correct 121 ms 37624 KB Output is correct
78 Correct 116 ms 34808 KB Output is correct
79 Correct 118 ms 34552 KB Output is correct
80 Correct 1080 ms 132472 KB Output is correct
81 Correct 1082 ms 132360 KB Output is correct
82 Correct 1084 ms 131580 KB Output is correct
83 Correct 1069 ms 132216 KB Output is correct
84 Correct 1067 ms 132344 KB Output is correct
85 Correct 1012 ms 127680 KB Output is correct
86 Correct 1039 ms 128116 KB Output is correct
87 Correct 979 ms 101112 KB Output is correct
88 Correct 1018 ms 109320 KB Output is correct
89 Correct 1014 ms 136260 KB Output is correct
90 Correct 1010 ms 136292 KB Output is correct
91 Correct 994 ms 136348 KB Output is correct
92 Correct 1186 ms 132324 KB Output is correct
93 Correct 1116 ms 101112 KB Output is correct
94 Correct 938 ms 115496 KB Output is correct
95 Correct 1026 ms 127208 KB Output is correct
96 Correct 1045 ms 129824 KB Output is correct
97 Correct 904 ms 117568 KB Output is correct
98 Correct 1014 ms 126776 KB Output is correct
99 Correct 1020 ms 128308 KB Output is correct
100 Correct 1878 ms 135144 KB Output is correct
101 Correct 2069 ms 135016 KB Output is correct
102 Correct 1168 ms 151164 KB Output is correct
103 Correct 1249 ms 151012 KB Output is correct
104 Correct 1164 ms 148836 KB Output is correct
105 Correct 1101 ms 148580 KB Output is correct
106 Correct 1286 ms 152420 KB Output is correct
107 Correct 1257 ms 152420 KB Output is correct
108 Correct 1254 ms 149856 KB Output is correct
109 Correct 1334 ms 149716 KB Output is correct
110 Correct 1294 ms 163772 KB Output is correct
111 Correct 1254 ms 163688 KB Output is correct
112 Correct 1225 ms 163936 KB Output is correct
113 Correct 1076 ms 131704 KB Output is correct
114 Correct 1082 ms 132216 KB Output is correct