oj.uz

Submission #1104583

# Submission time Handle Problem Language Result Execution time Memory
1104583 2024-10-24T05:44:27 Z simona1230 Stranded Far From Home (BOI22_island) C++17
100 / 100
 237 ms 23960 KB 
#include <bits/stdc++.h>
using namespace std;

int n,m;
int b[200001];
pair<int,int> a[200001];
vector<int> v[200001];
void read()
{
    cin>>n>>m;
    for(int i=1;i<=n;i++)
    {
        cin>>a[i].first;
        b[i]=a[i].first;
        a[i].second=i;
    }
        
    for(int i=1;i<=m;i++)
    {
        int x,y;
        cin>>x>>y;
        v[x].push_back(y);
        v[y].push_back(x);
    }
}

pair<int,int> p[200001];
long long sz[200001];

pair<int,int> parent(int x)
{
    if(x==p[x].first)return p[x];
    pair<int,int> y=parent(p[x].first);
    y.second=max(y.second,p[x].second);
    return p[x]=y;
}

void unite(int i,int j)
{
    pair<int,int> pi=parent(i);
    pair<int,int> pj=parent(j);
    if(pi.first==pj.first)return;
    //cout<<i<<" "<<j<<" "<<pi.first<<" "<<pj.first<<endl;
    
    i=pi.first;
    j=pj.first;
    
    sz[i]+=sz[j];
    p[j].first=i;
}

void solve()
{
    for(int i=1;i<=n;i++)
    {
        p[i].first=i;
        sz[i]=a[i].first;
    }
    sort(a+1,a+n+1);
    for(int i=1;i<=n;i++)
    {
        int vr=a[i].second;
        //cout<<a[i].first<<" "<<vr<<"!"<<endl;
        for(int j=0;j<v[vr].size();j++)
        {
            int nb=v[vr][j];
            pair<int,int> pnb=parent(nb);
            nb=pnb.first;
            if(sz[nb]<sz[vr])
                p[nb].second=1;
        }
        
        for(int j=0;j<v[vr].size();j++)
        {
            int nb=v[vr][j];
            if(b[nb]<=b[vr])
                unite(vr,nb);
        }
    }
    
    for(int i=1;i<=n;i++)
    {
        pair<int,int> p=parent(i);
        cout<<(1^p.second);
    }
    cout<<endl;
}

int main() 
{
    read();
    solve();
    return 0;
}

/*
7 6
2 2 1 1 8 5 5 
1 2
2 3
3 4
4 5
5 6
6 7
*/

Compilation message

island.cpp: In function 'void solve()':
island.cpp:65:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   65 |         for(int j=0;j<v[vr].size();j++)
      |                     ~^~~~~~~~~~~~~
island.cpp:74:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   74 |         for(int j=0;j<v[vr].size();j++)
      |                     ~^~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 8528 KB Output is correct
2 Correct 2 ms 8648 KB Output is correct
3 Correct 2 ms 8528 KB Output is correct
4 Correct 3 ms 8528 KB Output is correct
5 Correct 4 ms 8784 KB Output is correct
6 Correct 3 ms 8528 KB Output is correct
7 Correct 3 ms 8664 KB Output is correct
8 Correct 3 ms 8528 KB Output is correct
9 Correct 3 ms 8784 KB Output is correct
10 Correct 4 ms 8784 KB Output is correct
11 Correct 4 ms 8784 KB Output is correct
12 Correct 4 ms 8528 KB Output is correct
13 Correct 4 ms 8696 KB Output is correct
14 Correct 4 ms 8636 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 8528 KB Output is correct
2 Correct 2 ms 8528 KB Output is correct
3 Correct 200 ms 16872 KB Output is correct
4 Correct 148 ms 19864 KB Output is correct
5 Correct 193 ms 20300 KB Output is correct
6 Correct 179 ms 21320 KB Output is correct
7 Correct 163 ms 21320 KB Output is correct
8 Correct 184 ms 21320 KB Output is correct
9 Correct 180 ms 21384 KB Output is correct
10 Correct 155 ms 21180 KB Output is correct
11 Correct 165 ms 21080 KB Output is correct
12 Correct 160 ms 19784 KB Output is correct
13 Correct 162 ms 19528 KB Output is correct
14 Correct 165 ms 20044 KB Output is correct
15 Correct 179 ms 21280 KB Output is correct
16 Correct 123 ms 20552 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 8528 KB Output is correct
2 Correct 191 ms 16976 KB Output is correct
3 Correct 173 ms 21320 KB Output is correct
4 Correct 164 ms 21320 KB Output is correct
5 Correct 135 ms 19736 KB Output is correct
6 Correct 180 ms 21320 KB Output is correct
7 Correct 185 ms 21320 KB Output is correct
8 Correct 175 ms 21324 KB Output is correct
9 Correct 133 ms 20552 KB Output is correct
10 Correct 142 ms 23732 KB Output is correct
11 Correct 159 ms 20480 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 8528 KB Output is correct
2 Correct 191 ms 16968 KB Output is correct
3 Correct 226 ms 20552 KB Output is correct
4 Correct 237 ms 21320 KB Output is correct
5 Correct 222 ms 20296 KB Output is correct
6 Correct 210 ms 20372 KB Output is correct
7 Correct 197 ms 22972 KB Output is correct
8 Correct 135 ms 23372 KB Output is correct
9 Correct 124 ms 15944 KB Output is correct
10 Correct 145 ms 19528 KB Output is correct
11 Correct 144 ms 20812 KB Output is correct

Subtask #5
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 8528 KB Output is correct
2 Correct 2 ms 8648 KB Output is correct
3 Correct 2 ms 8528 KB Output is correct
4 Correct 3 ms 8528 KB Output is correct
5 Correct 4 ms 8784 KB Output is correct
6 Correct 3 ms 8528 KB Output is correct
7 Correct 3 ms 8664 KB Output is correct
8 Correct 3 ms 8528 KB Output is correct
9 Correct 3 ms 8784 KB Output is correct
10 Correct 4 ms 8784 KB Output is correct
11 Correct 4 ms 8784 KB Output is correct
12 Correct 4 ms 8528 KB Output is correct
13 Correct 4 ms 8696 KB Output is correct
14 Correct 4 ms 8636 KB Output is correct
15 Correct 2 ms 8528 KB Output is correct
16 Correct 2 ms 8528 KB Output is correct
17 Correct 200 ms 16872 KB Output is correct
18 Correct 148 ms 19864 KB Output is correct
19 Correct 193 ms 20300 KB Output is correct
20 Correct 179 ms 21320 KB Output is correct
21 Correct 163 ms 21320 KB Output is correct
22 Correct 184 ms 21320 KB Output is correct
23 Correct 180 ms 21384 KB Output is correct
24 Correct 155 ms 21180 KB Output is correct
25 Correct 165 ms 21080 KB Output is correct
26 Correct 160 ms 19784 KB Output is correct
27 Correct 162 ms 19528 KB Output is correct
28 Correct 165 ms 20044 KB Output is correct
29 Correct 179 ms 21280 KB Output is correct
30 Correct 123 ms 20552 KB Output is correct
31 Correct 2 ms 8528 KB Output is correct
32 Correct 191 ms 16976 KB Output is correct
33 Correct 173 ms 21320 KB Output is correct
34 Correct 164 ms 21320 KB Output is correct
35 Correct 135 ms 19736 KB Output is correct
36 Correct 180 ms 21320 KB Output is correct
37 Correct 185 ms 21320 KB Output is correct
38 Correct 175 ms 21324 KB Output is correct
39 Correct 133 ms 20552 KB Output is correct
40 Correct 142 ms 23732 KB Output is correct
41 Correct 159 ms 20480 KB Output is correct
42 Correct 2 ms 8528 KB Output is correct
43 Correct 191 ms 16968 KB Output is correct
44 Correct 226 ms 20552 KB Output is correct
45 Correct 237 ms 21320 KB Output is correct
46 Correct 222 ms 20296 KB Output is correct
47 Correct 210 ms 20372 KB Output is correct
48 Correct 197 ms 22972 KB Output is correct
49 Correct 135 ms 23372 KB Output is correct
50 Correct 124 ms 15944 KB Output is correct
51 Correct 145 ms 19528 KB Output is correct
52 Correct 144 ms 20812 KB Output is correct
53 Correct 2 ms 8528 KB Output is correct
54 Correct 2 ms 8528 KB Output is correct
55 Correct 2 ms 8528 KB Output is correct
56 Correct 4 ms 8528 KB Output is correct
57 Correct 4 ms 8784 KB Output is correct
58 Correct 3 ms 8672 KB Output is correct
59 Correct 4 ms 8528 KB Output is correct
60 Correct 4 ms 8528 KB Output is correct
61 Correct 3 ms 8784 KB Output is correct
62 Correct 3 ms 8784 KB Output is correct
63 Correct 4 ms 8784 KB Output is correct
64 Correct 4 ms 8528 KB Output is correct
65 Correct 3 ms 8528 KB Output is correct
66 Correct 5 ms 8528 KB Output is correct
67 Correct 157 ms 21320 KB Output is correct
68 Correct 152 ms 20040 KB Output is correct
69 Correct 160 ms 20656 KB Output is correct
70 Correct 159 ms 21320 KB Output is correct
71 Correct 194 ms 21320 KB Output is correct
72 Correct 196 ms 21384 KB Output is correct
73 Correct 178 ms 21064 KB Output is correct
74 Correct 155 ms 21180 KB Output is correct
75 Correct 158 ms 21180 KB Output is correct
76 Correct 145 ms 18940 KB Output is correct
77 Correct 140 ms 19780 KB Output is correct
78 Correct 135 ms 19784 KB Output is correct
79 Correct 155 ms 20296 KB Output is correct
80 Correct 132 ms 20552 KB Output is correct
81 Correct 219 ms 20808 KB Output is correct
82 Correct 207 ms 21308 KB Output is correct
83 Correct 216 ms 21320 KB Output is correct
84 Correct 159 ms 19784 KB Output is correct
85 Correct 204 ms 21332 KB Output is correct
86 Correct 162 ms 21288 KB Output is correct
87 Correct 185 ms 21320 KB Output is correct
88 Correct 165 ms 23960 KB Output is correct
89 Correct 164 ms 20808 KB Output is correct
90 Correct 204 ms 21484 KB Output is correct
91 Correct 194 ms 21372 KB Output is correct
92 Correct 193 ms 21320 KB Output is correct
93 Correct 195 ms 21308 KB Output is correct
94 Correct 174 ms 20364 KB Output is correct
95 Correct 154 ms 22716 KB Output is correct
96 Correct 127 ms 23364 KB Output is correct
97 Correct 129 ms 16252 KB Output is correct
98 Correct 194 ms 19528 KB Output is correct
99 Correct 200 ms 20808 KB Output is correct
100 Correct 74 ms 12872 KB Output is correct
101 Correct 202 ms 21332 KB Output is correct
102 Correct 192 ms 18916 KB Output is correct
103 Correct 180 ms 19784 KB Output is correct
104 Correct 182 ms 21324 KB Output is correct