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Submission #823748

# Submission time Handle Problem Language Result Execution time Memory
823748 2023-08-13T04:29:48 Z ttamx Stranded Far From Home (BOI22_island) C++14
100 / 100
 107 ms 20728 KB 
#include<bits/stdc++.h>

using namespace std;

typedef long long ll;

typedef pair<int,int> p2;
typedef tuple<int,int,int> t3;

const int N=2e5+5;

int n,m;
int s[2*N],fa[2*N],ans[2*N];
ll sz[2*N];
vector<t3> edge;
vector<p2> node;

int fp(int u){
    if(u==fa[u])return u;
    return fa[u]=fp(fa[u]);
}

void dfs(int u){
    if(u<=n)return;
    auto [l,r]=node[u];
    if(ans[u]==0)ans[l]=ans[r]=0;
    dfs(l);
    dfs(r);
}

int main(){
    cin.tie(nullptr)->sync_with_stdio(false);
    cin >> n >> m;
    for(int i=1;i<=n;i++)cin >> s[i];
    for(int i=1;i<=2*n;i++){
        fa[i]=i;
        sz[i]=s[i];
        ans[i]=1;
    }
    for(int i=0;i<m;i++){
        int u,v;
        cin >> u >> v;
        edge.emplace_back(max(s[u],s[v]),u,v);
    }
    sort(edge.begin(),edge.end());
    node=vector<p2>(n+1,p2(0,0));
    for(auto [w,u,v]:edge){
        int pu=fp(u),pv=fp(v);
        if(pu==pv)continue;
        if(sz[pu]<w)ans[pu]=0;
        if(sz[pv]<w)ans[pv]=0;
        int p=node.size();
        node.emplace_back(pu,pv);
        fa[pu]=fa[pv]=p;
        sz[p]=sz[pu]+sz[pv];
    }
    for(int i=2;i<=n;i++)if(fp(i)!=fp(1))cout << string(n,'0'),exit(0);
    dfs(node.size()-1);
    for(int i=1;i<=n;i++)cout << ans[i];
}

Compilation message

island.cpp: In function 'void dfs(int)':
island.cpp:25:10: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   25 |     auto [l,r]=node[u];
      |          ^
island.cpp: In function 'int main()':
island.cpp:47:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   47 |     for(auto [w,u,v]:edge){
      |              ^

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Correct 1 ms 468 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 80 ms 14492 KB Output is correct
4 Correct 73 ms 15956 KB Output is correct
5 Correct 83 ms 18300 KB Output is correct
6 Correct 82 ms 17448 KB Output is correct
7 Correct 98 ms 17508 KB Output is correct
8 Correct 87 ms 20644 KB Output is correct
9 Correct 79 ms 17504 KB Output is correct
10 Correct 70 ms 19896 KB Output is correct
11 Correct 68 ms 19604 KB Output is correct
12 Correct 77 ms 16704 KB Output is correct
13 Correct 67 ms 19140 KB Output is correct
14 Correct 69 ms 19056 KB Output is correct
15 Correct 72 ms 20716 KB Output is correct
16 Correct 55 ms 19820 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 82 ms 13072 KB Output is correct
3 Correct 84 ms 15356 KB Output is correct
4 Correct 75 ms 18604 KB Output is correct
5 Correct 67 ms 17504 KB Output is correct
6 Correct 82 ms 15364 KB Output is correct
7 Correct 73 ms 18584 KB Output is correct
8 Correct 83 ms 18528 KB Output is correct
9 Correct 56 ms 18512 KB Output is correct
10 Correct 73 ms 18516 KB Output is correct
11 Correct 73 ms 16516 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 91 ms 13268 KB Output is correct
3 Correct 90 ms 17548 KB Output is correct
4 Correct 89 ms 17588 KB Output is correct
5 Correct 83 ms 17540 KB Output is correct
6 Correct 82 ms 18612 KB Output is correct
7 Correct 80 ms 20696 KB Output is correct
8 Correct 66 ms 19556 KB Output is correct
9 Correct 64 ms 11432 KB Output is correct
10 Correct 78 ms 16068 KB Output is correct
11 Correct 81 ms 17076 KB Output is correct

Subtask #5
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 80 ms 14492 KB Output is correct
18 Correct 73 ms 15956 KB Output is correct
19 Correct 83 ms 18300 KB Output is correct
20 Correct 82 ms 17448 KB Output is correct
21 Correct 98 ms 17508 KB Output is correct
22 Correct 87 ms 20644 KB Output is correct
23 Correct 79 ms 17504 KB Output is correct
24 Correct 70 ms 19896 KB Output is correct
25 Correct 68 ms 19604 KB Output is correct
26 Correct 77 ms 16704 KB Output is correct
27 Correct 67 ms 19140 KB Output is correct
28 Correct 69 ms 19056 KB Output is correct
29 Correct 72 ms 20716 KB Output is correct
30 Correct 55 ms 19820 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 82 ms 13072 KB Output is correct
33 Correct 84 ms 15356 KB Output is correct
34 Correct 75 ms 18604 KB Output is correct
35 Correct 67 ms 17504 KB Output is correct
36 Correct 82 ms 15364 KB Output is correct
37 Correct 73 ms 18584 KB Output is correct
38 Correct 83 ms 18528 KB Output is correct
39 Correct 56 ms 18512 KB Output is correct
40 Correct 73 ms 18516 KB Output is correct
41 Correct 73 ms 16516 KB Output is correct
42 Correct 0 ms 340 KB Output is correct
43 Correct 91 ms 13268 KB Output is correct
44 Correct 90 ms 17548 KB Output is correct
45 Correct 89 ms 17588 KB Output is correct
46 Correct 83 ms 17540 KB Output is correct
47 Correct 82 ms 18612 KB Output is correct
48 Correct 80 ms 20696 KB Output is correct
49 Correct 66 ms 19556 KB Output is correct
50 Correct 64 ms 11432 KB Output is correct
51 Correct 78 ms 16068 KB Output is correct
52 Correct 81 ms 17076 KB Output is correct
53 Correct 1 ms 340 KB Output is correct
54 Correct 0 ms 320 KB Output is correct
55 Correct 0 ms 324 KB Output is correct
56 Correct 1 ms 468 KB Output is correct
57 Correct 1 ms 468 KB Output is correct
58 Correct 1 ms 468 KB Output is correct
59 Correct 1 ms 468 KB Output is correct
60 Correct 1 ms 468 KB Output is correct
61 Correct 1 ms 468 KB Output is correct
62 Correct 1 ms 468 KB Output is correct
63 Correct 1 ms 468 KB Output is correct
64 Correct 1 ms 464 KB Output is correct
65 Correct 1 ms 468 KB Output is correct
66 Correct 1 ms 468 KB Output is correct
67 Correct 77 ms 18992 KB Output is correct
68 Correct 85 ms 19008 KB Output is correct
69 Correct 83 ms 18352 KB Output is correct
70 Correct 80 ms 17508 KB Output is correct
71 Correct 79 ms 17520 KB Output is correct
72 Correct 84 ms 20588 KB Output is correct
73 Correct 78 ms 17480 KB Output is correct
74 Correct 70 ms 19812 KB Output is correct
75 Correct 70 ms 19608 KB Output is correct
76 Correct 76 ms 16788 KB Output is correct
77 Correct 67 ms 19216 KB Output is correct
78 Correct 68 ms 18968 KB Output is correct
79 Correct 74 ms 20700 KB Output is correct
80 Correct 55 ms 19780 KB Output is correct
81 Correct 83 ms 17440 KB Output is correct
82 Correct 91 ms 17592 KB Output is correct
83 Correct 74 ms 20728 KB Output is correct
84 Correct 73 ms 18120 KB Output is correct
85 Correct 82 ms 17624 KB Output is correct
86 Correct 77 ms 20676 KB Output is correct
87 Correct 75 ms 20680 KB Output is correct
88 Correct 76 ms 19992 KB Output is correct
89 Correct 73 ms 17156 KB Output is correct
90 Correct 92 ms 17736 KB Output is correct
91 Correct 94 ms 17560 KB Output is correct
92 Correct 107 ms 17572 KB Output is correct
93 Correct 86 ms 17644 KB Output is correct
94 Correct 86 ms 18688 KB Output is correct
95 Correct 82 ms 20616 KB Output is correct
96 Correct 64 ms 19484 KB Output is correct
97 Correct 63 ms 11320 KB Output is correct
98 Correct 76 ms 16076 KB Output is correct
99 Correct 77 ms 17176 KB Output is correct
100 Correct 47 ms 5008 KB Output is correct
101 Correct 89 ms 17672 KB Output is correct
102 Correct 79 ms 16672 KB Output is correct
103 Correct 84 ms 17780 KB Output is correct
104 Correct 88 ms 19168 KB Output is correct