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Submission #572681

# Submission time Handle Problem Language Result Execution time Memory
572681 2022-06-05T03:27:44 Z jlallas384 Stranded Far From Home (BOI22_island) C++17
100 / 100
 286 ms 48272 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;

struct ufds{
    vector<int> par;
    ufds(int n): par(n){
        iota(par.begin(), par.end(), 0);
    }
    int find(int a){
        return a == par[a] ? a : par[a] = find(par[a]);
    }
    int unite(int a,int b){
        a = find(a), b = find(b);
        if(a == b) return 0;
        par[b] = a;
        return 1;
    }
};

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n,m;
    cin >> n >> m;
    vector<int> s(n);
    for(int &x: s){
        cin >> x;
    }
    vector<vector<int>> g(n);
    while(m--){
        int u,v;
        cin >> u >> v,u--,v--;
        g[u].push_back(v);
        g[v].push_back(u);
    }
    vector<int> ok(n);
    vector<pair<int,int>> srt;
    for(int i = 0; i < n; i++){
        srt.emplace_back(s[i],i);
    }
    sort(srt.begin(), srt.end());
    vector<vector<int>> tree(n);
    ufds ds(n);
    for(auto [x,v]: srt){
        for(int u: g[v]) if(ok[u]){
            if(ok[u] && ds.find(u) != ds.find(v)){
                tree[v].push_back(ds.find(u));
                ds.unite(v,u);
            }
        }
        ok[v] = 1;
    }
    vector<ll> sums;
    for(auto x: s){
        sums.push_back(x);
    }
    vector<int> ans(n);
    function <void(int)> dfs = [&](int v){
        ans[v] = 1;
        for(int u: tree[v]){
            dfs(u);
            ans[u] &= s[v] <= sums[u];
            sums[v] += sums[u];
        }
    };
    function <void(int)> dfs1 = [&](int v){
        for(int u: tree[v]){
            ans[u] &= ans[v];
            dfs1(u);
        }
    };
    dfs(ds.find(0));
    dfs1(ds.find(0));
    for(int x: ans){
        cout << x;
    }
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 596 KB Output is correct
5 Correct 2 ms 596 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 2 ms 596 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 1 ms 724 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 724 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 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 150 ms 34148 KB Output is correct
4 Correct 181 ms 45676 KB Output is correct
5 Correct 214 ms 26180 KB Output is correct
6 Correct 189 ms 26860 KB Output is correct
7 Correct 221 ms 26876 KB Output is correct
8 Correct 189 ms 47528 KB Output is correct
9 Correct 146 ms 26196 KB Output is correct
10 Correct 137 ms 25276 KB Output is correct
11 Correct 151 ms 48240 KB Output is correct
12 Correct 214 ms 29996 KB Output is correct
13 Correct 171 ms 47372 KB Output is correct
14 Correct 191 ms 45564 KB Output is correct
15 Correct 147 ms 47408 KB Output is correct
16 Correct 103 ms 46976 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 218 ms 27000 KB Output is correct
3 Correct 199 ms 27060 KB Output is correct
4 Correct 176 ms 47396 KB Output is correct
5 Correct 159 ms 41416 KB Output is correct
6 Correct 225 ms 27092 KB Output is correct
7 Correct 163 ms 47420 KB Output is correct
8 Correct 166 ms 47452 KB Output is correct
9 Correct 129 ms 46912 KB Output is correct
10 Correct 139 ms 34876 KB Output is correct
11 Correct 157 ms 30116 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 286 ms 27452 KB Output is correct
3 Correct 219 ms 26796 KB Output is correct
4 Correct 217 ms 26944 KB Output is correct
5 Correct 240 ms 26804 KB Output is correct
6 Correct 183 ms 27636 KB Output is correct
7 Correct 119 ms 37424 KB Output is correct
8 Correct 120 ms 47380 KB Output is correct
9 Correct 136 ms 15468 KB Output is correct
10 Correct 202 ms 26992 KB Output is correct
11 Correct 172 ms 30048 KB Output is correct

Subtask #5
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 596 KB Output is correct
5 Correct 2 ms 596 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 2 ms 596 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 1 ms 724 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 724 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 150 ms 34148 KB Output is correct
18 Correct 181 ms 45676 KB Output is correct
19 Correct 214 ms 26180 KB Output is correct
20 Correct 189 ms 26860 KB Output is correct
21 Correct 221 ms 26876 KB Output is correct
22 Correct 189 ms 47528 KB Output is correct
23 Correct 146 ms 26196 KB Output is correct
24 Correct 137 ms 25276 KB Output is correct
25 Correct 151 ms 48240 KB Output is correct
26 Correct 214 ms 29996 KB Output is correct
27 Correct 171 ms 47372 KB Output is correct
28 Correct 191 ms 45564 KB Output is correct
29 Correct 147 ms 47408 KB Output is correct
30 Correct 103 ms 46976 KB Output is correct
31 Correct 1 ms 212 KB Output is correct
32 Correct 218 ms 27000 KB Output is correct
33 Correct 199 ms 27060 KB Output is correct
34 Correct 176 ms 47396 KB Output is correct
35 Correct 159 ms 41416 KB Output is correct
36 Correct 225 ms 27092 KB Output is correct
37 Correct 163 ms 47420 KB Output is correct
38 Correct 166 ms 47452 KB Output is correct
39 Correct 129 ms 46912 KB Output is correct
40 Correct 139 ms 34876 KB Output is correct
41 Correct 157 ms 30116 KB Output is correct
42 Correct 1 ms 212 KB Output is correct
43 Correct 286 ms 27452 KB Output is correct
44 Correct 219 ms 26796 KB Output is correct
45 Correct 217 ms 26944 KB Output is correct
46 Correct 240 ms 26804 KB Output is correct
47 Correct 183 ms 27636 KB Output is correct
48 Correct 119 ms 37424 KB Output is correct
49 Correct 120 ms 47380 KB Output is correct
50 Correct 136 ms 15468 KB Output is correct
51 Correct 202 ms 26992 KB Output is correct
52 Correct 172 ms 30048 KB Output is correct
53 Correct 0 ms 212 KB Output is correct
54 Correct 0 ms 212 KB Output is correct
55 Correct 0 ms 212 KB Output is correct
56 Correct 1 ms 596 KB Output is correct
57 Correct 1 ms 596 KB Output is correct
58 Correct 2 ms 468 KB Output is correct
59 Correct 1 ms 596 KB Output is correct
60 Correct 1 ms 468 KB Output is correct
61 Correct 1 ms 724 KB Output is correct
62 Correct 2 ms 468 KB Output is correct
63 Correct 2 ms 468 KB Output is correct
64 Correct 1 ms 468 KB Output is correct
65 Correct 1 ms 724 KB Output is correct
66 Correct 2 ms 596 KB Output is correct
67 Correct 143 ms 34228 KB Output is correct
68 Correct 152 ms 45632 KB Output is correct
69 Correct 208 ms 26304 KB Output is correct
70 Correct 186 ms 26824 KB Output is correct
71 Correct 194 ms 26956 KB Output is correct
72 Correct 178 ms 47508 KB Output is correct
73 Correct 182 ms 26052 KB Output is correct
74 Correct 139 ms 25224 KB Output is correct
75 Correct 145 ms 48272 KB Output is correct
76 Correct 236 ms 29956 KB Output is correct
77 Correct 159 ms 47424 KB Output is correct
78 Correct 166 ms 45576 KB Output is correct
79 Correct 155 ms 47424 KB Output is correct
80 Correct 127 ms 46912 KB Output is correct
81 Correct 212 ms 26968 KB Output is correct
82 Correct 212 ms 27060 KB Output is correct
83 Correct 170 ms 47424 KB Output is correct
84 Correct 153 ms 41384 KB Output is correct
85 Correct 194 ms 27072 KB Output is correct
86 Correct 160 ms 47452 KB Output is correct
87 Correct 181 ms 47412 KB Output is correct
88 Correct 149 ms 34884 KB Output is correct
89 Correct 160 ms 30084 KB Output is correct
90 Correct 241 ms 27440 KB Output is correct
91 Correct 225 ms 26812 KB Output is correct
92 Correct 269 ms 26976 KB Output is correct
93 Correct 235 ms 26924 KB Output is correct
94 Correct 203 ms 27656 KB Output is correct
95 Correct 144 ms 37320 KB Output is correct
96 Correct 116 ms 47420 KB Output is correct
97 Correct 134 ms 15508 KB Output is correct
98 Correct 223 ms 26948 KB Output is correct
99 Correct 170 ms 30084 KB Output is correct
100 Correct 39 ms 3264 KB Output is correct
101 Correct 267 ms 26968 KB Output is correct
102 Correct 186 ms 26508 KB Output is correct
103 Correct 230 ms 27312 KB Output is correct
104 Correct 246 ms 27992 KB Output is correct