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Submission #1104956

# Submission time Handle Problem Language Result Execution time Memory
1104956 2024-10-25T00:38:36 Z koukirocks Stranded Far From Home (BOI22_island) C++17
100 / 100
 162 ms 28600 KB 
#include <bits/stdc++.h>
#define speed ios_base::sync_with_stdio(0); cin.tie(0)
#define all(x) (x).begin(),(x).end()
#define F first
#define S second
//#pragma GCC optimize("O3,unroll-loops")
//#pragma GCC target("avx,avx2")
//#pragma GCC target("popcnt")
 
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef double db;
typedef long double ldb;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
 
const ll MAX=2e5+10,P=1e9+7;
const ll INF=0x3f3f3f3f,oo=0x3f3f3f3f3f3f3f3f;
const ldb eps=1e-6;
const ldb PI=acos(-1.0);
const int dir[4][2]={{0,1},{0,-1},{1,0},{-1,0}};
template<typename T>
using vvector = vector<vector<T>>;

struct DSU {
    int n;
    vector<ll> fa;
    vector<ll> cnt;
    vector<ll> del;
    DSU(int _n,vector<pll> &w):n(_n) {
        fa.resize(n+1);
        cnt.resize(n+1);
        del.resize(n+1);
        for (int i=0;i<n;i++) {
            cnt[w[i].S]=w[i].F;
        }
        iota(all(fa),0);
    }
    pll get(ll x) {
        if (fa[x]==x) return {del[x],x};
        else {
            pll ret = get(fa[x]);
            del[x]|=ret.F;
            fa[x]=ret.S;
            return {del[x]|ret.F,ret.S};
        }
    }
    void unionn(int a,int b) {
        a=get(a).S;b=get(b).S;
        if (a==b) return;
        fa[a]=b;
        cnt[b]+=cnt[a];
    }
};

int main() {
    speed;
    int n,m;
    cin>>n>>m;
    vvector<ll> G(n+1);
    vector<pll> w;
    vector<ll> cnt(n+1);
    for (int i=1;i<=n;i++) {
        cin>>cnt[i];
        w.emplace_back(cnt[i],i);
    }
    sort(all(w));
    for (int i=0;i<m;i++) {
        ll a,b;
        cin>>a>>b;
        G[a].push_back(b);
        G[b].push_back(a);
    }
    DSU d(n,w);
    for (int i=1;i<n;i++) {
        ll v=w[i].S;
        for (ll u:G[v]) {
            if (cnt[u]>cnt[v]) continue;
            ll ru=d.get(u).S;
            if (d.cnt[ru]<cnt[v]) d.del[ru]=true;
            d.unionn(u,v);
        }
    }
    for (int i=1;i<=n;i++) {
        pll ret = d.get(i);
        cout<<!(d.del[i]);
    }
    return 0;
}

Compilation message

island.cpp: In function 'int main()':
island.cpp:86:13: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
   86 |         pll ret = d.get(i);
      |             ^~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 396 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 2 ms 592 KB Output is correct
5 Correct 1 ms 592 KB Output is correct
6 Correct 2 ms 592 KB Output is correct
7 Correct 2 ms 592 KB Output is correct
8 Correct 1 ms 592 KB Output is correct
9 Correct 1 ms 592 KB Output is correct
10 Correct 2 ms 592 KB Output is correct
11 Correct 2 ms 592 KB Output is correct
12 Correct 1 ms 592 KB Output is correct
13 Correct 2 ms 592 KB Output is correct
14 Correct 1 ms 592 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 101 ms 22968 KB Output is correct
4 Correct 114 ms 22984 KB Output is correct
5 Correct 102 ms 26552 KB Output is correct
6 Correct 114 ms 27168 KB Output is correct
7 Correct 110 ms 27316 KB Output is correct
8 Correct 105 ms 27320 KB Output is correct
9 Correct 103 ms 28592 KB Output is correct
10 Correct 75 ms 27024 KB Output is correct
11 Correct 94 ms 26844 KB Output is correct
12 Correct 120 ms 25784 KB Output is correct
13 Correct 94 ms 24828 KB Output is correct
14 Correct 92 ms 24928 KB Output is correct
15 Correct 129 ms 26368 KB Output is correct
16 Correct 59 ms 25532 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 135 ms 21660 KB Output is correct
3 Correct 142 ms 26176 KB Output is correct
4 Correct 162 ms 26304 KB Output is correct
5 Correct 123 ms 24688 KB Output is correct
6 Correct 109 ms 26296 KB Output is correct
7 Correct 131 ms 26316 KB Output is correct
8 Correct 110 ms 26220 KB Output is correct
9 Correct 66 ms 25528 KB Output is correct
10 Correct 96 ms 26892 KB Output is correct
11 Correct 110 ms 25204 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 128 ms 22712 KB Output is correct
3 Correct 148 ms 27060 KB Output is correct
4 Correct 149 ms 27244 KB Output is correct
5 Correct 136 ms 27320 KB Output is correct
6 Correct 112 ms 26552 KB Output is correct
7 Correct 86 ms 28204 KB Output is correct
8 Correct 71 ms 27832 KB Output is correct
9 Correct 82 ms 16208 KB Output is correct
10 Correct 110 ms 25784 KB Output is correct
11 Correct 102 ms 25072 KB Output is correct

Subtask #5
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 396 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 2 ms 592 KB Output is correct
5 Correct 1 ms 592 KB Output is correct
6 Correct 2 ms 592 KB Output is correct
7 Correct 2 ms 592 KB Output is correct
8 Correct 1 ms 592 KB Output is correct
9 Correct 1 ms 592 KB Output is correct
10 Correct 2 ms 592 KB Output is correct
11 Correct 2 ms 592 KB Output is correct
12 Correct 1 ms 592 KB Output is correct
13 Correct 2 ms 592 KB Output is correct
14 Correct 1 ms 592 KB Output is correct
15 Correct 1 ms 336 KB Output is correct
16 Correct 1 ms 336 KB Output is correct
17 Correct 101 ms 22968 KB Output is correct
18 Correct 114 ms 22984 KB Output is correct
19 Correct 102 ms 26552 KB Output is correct
20 Correct 114 ms 27168 KB Output is correct
21 Correct 110 ms 27316 KB Output is correct
22 Correct 105 ms 27320 KB Output is correct
23 Correct 103 ms 28592 KB Output is correct
24 Correct 75 ms 27024 KB Output is correct
25 Correct 94 ms 26844 KB Output is correct
26 Correct 120 ms 25784 KB Output is correct
27 Correct 94 ms 24828 KB Output is correct
28 Correct 92 ms 24928 KB Output is correct
29 Correct 129 ms 26368 KB Output is correct
30 Correct 59 ms 25532 KB Output is correct
31 Correct 1 ms 336 KB Output is correct
32 Correct 135 ms 21660 KB Output is correct
33 Correct 142 ms 26176 KB Output is correct
34 Correct 162 ms 26304 KB Output is correct
35 Correct 123 ms 24688 KB Output is correct
36 Correct 109 ms 26296 KB Output is correct
37 Correct 131 ms 26316 KB Output is correct
38 Correct 110 ms 26220 KB Output is correct
39 Correct 66 ms 25528 KB Output is correct
40 Correct 96 ms 26892 KB Output is correct
41 Correct 110 ms 25204 KB Output is correct
42 Correct 1 ms 336 KB Output is correct
43 Correct 128 ms 22712 KB Output is correct
44 Correct 148 ms 27060 KB Output is correct
45 Correct 149 ms 27244 KB Output is correct
46 Correct 136 ms 27320 KB Output is correct
47 Correct 112 ms 26552 KB Output is correct
48 Correct 86 ms 28204 KB Output is correct
49 Correct 71 ms 27832 KB Output is correct
50 Correct 82 ms 16208 KB Output is correct
51 Correct 110 ms 25784 KB Output is correct
52 Correct 102 ms 25072 KB Output is correct
53 Correct 1 ms 336 KB Output is correct
54 Correct 1 ms 336 KB Output is correct
55 Correct 1 ms 336 KB Output is correct
56 Correct 2 ms 592 KB Output is correct
57 Correct 2 ms 592 KB Output is correct
58 Correct 1 ms 592 KB Output is correct
59 Correct 1 ms 592 KB Output is correct
60 Correct 2 ms 592 KB Output is correct
61 Correct 2 ms 760 KB Output is correct
62 Correct 2 ms 472 KB Output is correct
63 Correct 2 ms 592 KB Output is correct
64 Correct 2 ms 620 KB Output is correct
65 Correct 1 ms 472 KB Output is correct
66 Correct 2 ms 592 KB Output is correct
67 Correct 98 ms 27312 KB Output is correct
68 Correct 82 ms 26040 KB Output is correct
69 Correct 105 ms 26552 KB Output is correct
70 Correct 113 ms 27320 KB Output is correct
71 Correct 94 ms 27320 KB Output is correct
72 Correct 85 ms 27328 KB Output is correct
73 Correct 82 ms 28600 KB Output is correct
74 Correct 66 ms 27064 KB Output is correct
75 Correct 98 ms 26820 KB Output is correct
76 Correct 79 ms 25784 KB Output is correct
77 Correct 78 ms 24760 KB Output is correct
78 Correct 75 ms 25016 KB Output is correct
79 Correct 80 ms 26244 KB Output is correct
80 Correct 59 ms 25280 KB Output is correct
81 Correct 99 ms 26296 KB Output is correct
82 Correct 105 ms 26300 KB Output is correct
83 Correct 97 ms 26360 KB Output is correct
84 Correct 77 ms 24760 KB Output is correct
85 Correct 98 ms 26296 KB Output is correct
86 Correct 96 ms 26424 KB Output is correct
87 Correct 96 ms 26420 KB Output is correct
88 Correct 78 ms 26808 KB Output is correct
89 Correct 94 ms 25272 KB Output is correct
90 Correct 122 ms 27288 KB Output is correct
91 Correct 130 ms 27064 KB Output is correct
92 Correct 119 ms 27320 KB Output is correct
93 Correct 126 ms 27328 KB Output is correct
94 Correct 114 ms 26552 KB Output is correct
95 Correct 93 ms 28212 KB Output is correct
96 Correct 69 ms 27828 KB Output is correct
97 Correct 77 ms 16328 KB Output is correct
98 Correct 132 ms 25916 KB Output is correct
99 Correct 94 ms 25272 KB Output is correct
100 Correct 34 ms 6992 KB Output is correct
101 Correct 147 ms 27452 KB Output is correct
102 Correct 117 ms 23884 KB Output is correct
103 Correct 125 ms 24760 KB Output is correct
104 Correct 141 ms 27076 KB Output is correct