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Submission #574509

# Submission time Handle Problem Language Result Execution time Memory
574509 2022-06-08T16:16:03 Z stevancv Stranded Far From Home (BOI22_island) C++14
100 / 100
 219 ms 25716 KB 
#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define sp ' '
#define en '\n'
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
using namespace std;
const int N = 2e5 + 2;
int mod = 1000000007;
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int n, m;
    cin >> n >> m;
    vector<ll> s(n), sum(n);
    for (int i = 0; i < n; i++) {
        cin >> s[i];
        sum[i] = s[i];
    }
    vector<int> a(m), b(m);
    for (int i = 0; i < m; i++) {
        cin >> a[i] >> b[i];
        a[i] -= 1;
        b[i] -= 1;
        if (s[a[i]] > s[b[i]]) swap(a[i], b[i]);
    }
    vector<int> order(m);
    iota(order.begin(), order.end(), 0);
    sort(order.begin(), order.end(), [&] (int i, int j) {
        return s[b[i]] < s[b[j]];
    });
    vector<int> p(n);
    iota(p.begin(), p.end(), 0);
    function<int(int)> Find = [&] (int x) {
        if (x == p[x]) return x;
        return p[x] = Find(p[x]);
    };
    vector<vector<int>> g(n);
    function<void(int, int)> Unite = [&] (int u, int v) {
        u = Find(u);
        v = Find(v);
        p[u] = v;
        sum[v] += sum[u];
        g[u].push_back(v);
    };
    vector<bool> can(n, 1);
    for (int i : order) {
        int x = Find(a[i]);
        int y = Find(b[i]);
        if (x == y) continue;
        if (sum[x] < s[y]) can[x] = 0;
        Unite(x, y);
    }
    vector<bool> was(n);
    function<int(int)> Dfs = [&] (int s) {
        if (was[s]) return can[s];
        was[s] = 1;
        for (int u : g[s]) {
            if (Dfs(u) == 0) can[s] = 0;
        }
        return can[s];
    };
    for (int i = 0; i < n; i++) {
        if (!was[i]) Dfs(i);
    }
    for (int i = 0; i < n; i++) cout << can[i];
    cout << en;
    return 0;
}

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 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 2 ms 468 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 2 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 2 ms 468 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 115 ms 17728 KB Output is correct
4 Correct 126 ms 17696 KB Output is correct
5 Correct 163 ms 17144 KB Output is correct
6 Correct 139 ms 17684 KB Output is correct
7 Correct 175 ms 17828 KB Output is correct
8 Correct 149 ms 17708 KB Output is correct
9 Correct 114 ms 17688 KB Output is correct
10 Correct 122 ms 17708 KB Output is correct
11 Correct 138 ms 25500 KB Output is correct
12 Correct 161 ms 17740 KB Output is correct
13 Correct 125 ms 17744 KB Output is correct
14 Correct 169 ms 17748 KB Output is correct
15 Correct 106 ms 17732 KB Output is correct
16 Correct 75 ms 17612 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 182 ms 17612 KB Output is correct
3 Correct 179 ms 17816 KB Output is correct
4 Correct 124 ms 17784 KB Output is correct
5 Correct 117 ms 17696 KB Output is correct
6 Correct 165 ms 17772 KB Output is correct
7 Correct 137 ms 17788 KB Output is correct
8 Correct 110 ms 17740 KB Output is correct
9 Correct 74 ms 17544 KB Output is correct
10 Correct 122 ms 17732 KB Output is correct
11 Correct 144 ms 17688 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 164 ms 18056 KB Output is correct
3 Correct 185 ms 17808 KB Output is correct
4 Correct 155 ms 17716 KB Output is correct
5 Correct 144 ms 17812 KB Output is correct
6 Correct 129 ms 17376 KB Output is correct
7 Correct 150 ms 22476 KB Output is correct
8 Correct 97 ms 25608 KB Output is correct
9 Correct 92 ms 10760 KB Output is correct
10 Correct 137 ms 17740 KB Output is correct
11 Correct 143 ms 17744 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 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 2 ms 468 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 2 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 2 ms 468 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 115 ms 17728 KB Output is correct
18 Correct 126 ms 17696 KB Output is correct
19 Correct 163 ms 17144 KB Output is correct
20 Correct 139 ms 17684 KB Output is correct
21 Correct 175 ms 17828 KB Output is correct
22 Correct 149 ms 17708 KB Output is correct
23 Correct 114 ms 17688 KB Output is correct
24 Correct 122 ms 17708 KB Output is correct
25 Correct 138 ms 25500 KB Output is correct
26 Correct 161 ms 17740 KB Output is correct
27 Correct 125 ms 17744 KB Output is correct
28 Correct 169 ms 17748 KB Output is correct
29 Correct 106 ms 17732 KB Output is correct
30 Correct 75 ms 17612 KB Output is correct
31 Correct 0 ms 212 KB Output is correct
32 Correct 182 ms 17612 KB Output is correct
33 Correct 179 ms 17816 KB Output is correct
34 Correct 124 ms 17784 KB Output is correct
35 Correct 117 ms 17696 KB Output is correct
36 Correct 165 ms 17772 KB Output is correct
37 Correct 137 ms 17788 KB Output is correct
38 Correct 110 ms 17740 KB Output is correct
39 Correct 74 ms 17544 KB Output is correct
40 Correct 122 ms 17732 KB Output is correct
41 Correct 144 ms 17688 KB Output is correct
42 Correct 1 ms 212 KB Output is correct
43 Correct 164 ms 18056 KB Output is correct
44 Correct 185 ms 17808 KB Output is correct
45 Correct 155 ms 17716 KB Output is correct
46 Correct 144 ms 17812 KB Output is correct
47 Correct 129 ms 17376 KB Output is correct
48 Correct 150 ms 22476 KB Output is correct
49 Correct 97 ms 25608 KB Output is correct
50 Correct 92 ms 10760 KB Output is correct
51 Correct 137 ms 17740 KB Output is correct
52 Correct 143 ms 17744 KB Output is correct
53 Correct 1 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 2 ms 468 KB Output is correct
57 Correct 1 ms 468 KB Output is correct
58 Correct 1 ms 340 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 2 ms 468 KB Output is correct
63 Correct 1 ms 468 KB Output is correct
64 Correct 1 ms 468 KB Output is correct
65 Correct 1 ms 468 KB Output is correct
66 Correct 1 ms 468 KB Output is correct
67 Correct 129 ms 17684 KB Output is correct
68 Correct 110 ms 17740 KB Output is correct
69 Correct 123 ms 17156 KB Output is correct
70 Correct 126 ms 17672 KB Output is correct
71 Correct 148 ms 17796 KB Output is correct
72 Correct 135 ms 17820 KB Output is correct
73 Correct 103 ms 17792 KB Output is correct
74 Correct 103 ms 17688 KB Output is correct
75 Correct 169 ms 25620 KB Output is correct
76 Correct 127 ms 17816 KB Output is correct
77 Correct 115 ms 17684 KB Output is correct
78 Correct 139 ms 17840 KB Output is correct
79 Correct 123 ms 17704 KB Output is correct
80 Correct 73 ms 17608 KB Output is correct
81 Correct 170 ms 17628 KB Output is correct
82 Correct 194 ms 17708 KB Output is correct
83 Correct 138 ms 17792 KB Output is correct
84 Correct 112 ms 17764 KB Output is correct
85 Correct 154 ms 17788 KB Output is correct
86 Correct 127 ms 17688 KB Output is correct
87 Correct 123 ms 17684 KB Output is correct
88 Correct 120 ms 17792 KB Output is correct
89 Correct 133 ms 17804 KB Output is correct
90 Correct 161 ms 18060 KB Output is correct
91 Correct 154 ms 17740 KB Output is correct
92 Correct 157 ms 17780 KB Output is correct
93 Correct 152 ms 17800 KB Output is correct
94 Correct 158 ms 17480 KB Output is correct
95 Correct 133 ms 22516 KB Output is correct
96 Correct 97 ms 25716 KB Output is correct
97 Correct 103 ms 10696 KB Output is correct
98 Correct 125 ms 17752 KB Output is correct
99 Correct 127 ms 17724 KB Output is correct
100 Correct 55 ms 2992 KB Output is correct
101 Correct 219 ms 17832 KB Output is correct
102 Correct 141 ms 15076 KB Output is correct
103 Correct 177 ms 18448 KB Output is correct
104 Correct 210 ms 18008 KB Output is correct