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Submission #599796

# Submission time Handle Problem Language Result Execution time Memory
599796 2022-07-19T23:42:50 Z yanndev Stranded Far From Home (BOI22_island) C++17
100 / 100
 374 ms 37808 KB 
#include <bits/stdc++.h>
#define fi first
#define se second
#define int long long
using namespace std;

const int MX_N = 2e5 + 42;

int par[MX_N];
int sum[MX_N];
int guys[MX_N];
bool isOk[MX_N];
vector<int> graph[MX_N];
vector<int> dsuTree[MX_N];

int find(int node) {
    if (par[node] < 0)
        return node;
    return par[node] = find(par[node]);
}

void unite(int u, int v) {
    //cout << "edge " << u + 1 << ' ' << v + 1 << '\n';
    u = find(u);
    v = find(v);
    if (u == v)
        return;
    //cout << " compo is " << u + 1 << '\n';
    if (sum[u] < guys[v]) {
        //cout << "nok\n";
        isOk[u] = false;
    }
    par[v] += par[u];
    par[u] = v;
    sum[v] += sum[u];
    dsuTree[v].push_back(u);
}

void upd(int node, bool fuck) {
    //cout << "ucr is " << node << '\n';
    fuck &= isOk[node];
    for (auto& x: dsuTree[node])
        upd(x, fuck);
    isOk[node] = fuck;
}

signed main() {
    int n, m;
    cin >> n >> m;

    vector<pair<int, int>> nodes {};

    for (int i = 0; i < n; i++) {
        cin >> guys[i];
        nodes.push_back({guys[i], i});
        par[i] = -1;
        sum[i] = guys[i];
        isOk[i] = true;
    }
    
    for (int i = 0; i < m; i++) {
        int u, v;
        cin >> u >> v;
        u--, v--;
        graph[u].push_back(v);
        graph[v].push_back(u);
    }

    sort(nodes.begin(), nodes.end());
    for (int i = 0; i < n; i++)
        for (auto& x: graph[nodes[i].se])
            if (make_pair(guys[x], x) < nodes[i])
                unite(x, nodes[i].se);
    
    upd(nodes.back().se, true);
    /*for (int i = 0; i < n; i++) {
        for (auto& x: dsuTree[i]) {
            cout << "dsu edge " << i + 1 << " to " << x + 1 << '\n';
        }
    }*/
    for (int i = 0; i < n; i++)
        cout << isOk[i];
    cout << '\n';
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 5 ms 9716 KB Output is correct
4 Correct 7 ms 9912 KB Output is correct
5 Correct 8 ms 9808 KB Output is correct
6 Correct 7 ms 9848 KB Output is correct
7 Correct 7 ms 9812 KB Output is correct
8 Correct 9 ms 9812 KB Output is correct
9 Correct 6 ms 9940 KB Output is correct
10 Correct 8 ms 9812 KB Output is correct
11 Correct 7 ms 9812 KB Output is correct
12 Correct 7 ms 9812 KB Output is correct
13 Correct 7 ms 9940 KB Output is correct
14 Correct 6 ms 9812 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 6 ms 9812 KB Output is correct
3 Correct 280 ms 31588 KB Output is correct
4 Correct 245 ms 36216 KB Output is correct
5 Correct 305 ms 28680 KB Output is correct
6 Correct 297 ms 29216 KB Output is correct
7 Correct 343 ms 29348 KB Output is correct
8 Correct 304 ms 36868 KB Output is correct
9 Correct 304 ms 28908 KB Output is correct
10 Correct 243 ms 29388 KB Output is correct
11 Correct 264 ms 37468 KB Output is correct
12 Correct 340 ms 31408 KB Output is correct
13 Correct 238 ms 35936 KB Output is correct
14 Correct 258 ms 35372 KB Output is correct
15 Correct 276 ms 35872 KB Output is correct
16 Correct 224 ms 35612 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 333 ms 28132 KB Output is correct
3 Correct 303 ms 28372 KB Output is correct
4 Correct 321 ms 36108 KB Output is correct
5 Correct 228 ms 34212 KB Output is correct
6 Correct 342 ms 28340 KB Output is correct
7 Correct 291 ms 36016 KB Output is correct
8 Correct 293 ms 35936 KB Output is correct
9 Correct 219 ms 35644 KB Output is correct
10 Correct 250 ms 30080 KB Output is correct
11 Correct 257 ms 29304 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 347 ms 29536 KB Output is correct
3 Correct 337 ms 29388 KB Output is correct
4 Correct 358 ms 29480 KB Output is correct
5 Correct 325 ms 29488 KB Output is correct
6 Correct 306 ms 29300 KB Output is correct
7 Correct 259 ms 33000 KB Output is correct
8 Correct 216 ms 37808 KB Output is correct
9 Correct 233 ms 22284 KB Output is correct
10 Correct 254 ms 29364 KB Output is correct
11 Correct 255 ms 29384 KB Output is correct

Subtask #5
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 5 ms 9716 KB Output is correct
4 Correct 7 ms 9912 KB Output is correct
5 Correct 8 ms 9808 KB Output is correct
6 Correct 7 ms 9848 KB Output is correct
7 Correct 7 ms 9812 KB Output is correct
8 Correct 9 ms 9812 KB Output is correct
9 Correct 6 ms 9940 KB Output is correct
10 Correct 8 ms 9812 KB Output is correct
11 Correct 7 ms 9812 KB Output is correct
12 Correct 7 ms 9812 KB Output is correct
13 Correct 7 ms 9940 KB Output is correct
14 Correct 6 ms 9812 KB Output is correct
15 Correct 5 ms 9684 KB Output is correct
16 Correct 6 ms 9812 KB Output is correct
17 Correct 280 ms 31588 KB Output is correct
18 Correct 245 ms 36216 KB Output is correct
19 Correct 305 ms 28680 KB Output is correct
20 Correct 297 ms 29216 KB Output is correct
21 Correct 343 ms 29348 KB Output is correct
22 Correct 304 ms 36868 KB Output is correct
23 Correct 304 ms 28908 KB Output is correct
24 Correct 243 ms 29388 KB Output is correct
25 Correct 264 ms 37468 KB Output is correct
26 Correct 340 ms 31408 KB Output is correct
27 Correct 238 ms 35936 KB Output is correct
28 Correct 258 ms 35372 KB Output is correct
29 Correct 276 ms 35872 KB Output is correct
30 Correct 224 ms 35612 KB Output is correct
31 Correct 5 ms 9684 KB Output is correct
32 Correct 333 ms 28132 KB Output is correct
33 Correct 303 ms 28372 KB Output is correct
34 Correct 321 ms 36108 KB Output is correct
35 Correct 228 ms 34212 KB Output is correct
36 Correct 342 ms 28340 KB Output is correct
37 Correct 291 ms 36016 KB Output is correct
38 Correct 293 ms 35936 KB Output is correct
39 Correct 219 ms 35644 KB Output is correct
40 Correct 250 ms 30080 KB Output is correct
41 Correct 257 ms 29304 KB Output is correct
42 Correct 5 ms 9684 KB Output is correct
43 Correct 347 ms 29536 KB Output is correct
44 Correct 337 ms 29388 KB Output is correct
45 Correct 358 ms 29480 KB Output is correct
46 Correct 325 ms 29488 KB Output is correct
47 Correct 306 ms 29300 KB Output is correct
48 Correct 259 ms 33000 KB Output is correct
49 Correct 216 ms 37808 KB Output is correct
50 Correct 233 ms 22284 KB Output is correct
51 Correct 254 ms 29364 KB Output is correct
52 Correct 255 ms 29384 KB Output is correct
53 Correct 5 ms 9684 KB Output is correct
54 Correct 5 ms 9684 KB Output is correct
55 Correct 6 ms 9684 KB Output is correct
56 Correct 7 ms 9812 KB Output is correct
57 Correct 8 ms 9984 KB Output is correct
58 Correct 7 ms 9840 KB Output is correct
59 Correct 7 ms 9860 KB Output is correct
60 Correct 7 ms 9812 KB Output is correct
61 Correct 7 ms 9940 KB Output is correct
62 Correct 7 ms 9812 KB Output is correct
63 Correct 7 ms 9812 KB Output is correct
64 Correct 7 ms 9812 KB Output is correct
65 Correct 6 ms 9940 KB Output is correct
66 Correct 7 ms 9812 KB Output is correct
67 Correct 300 ms 31584 KB Output is correct
68 Correct 231 ms 36208 KB Output is correct
69 Correct 296 ms 28720 KB Output is correct
70 Correct 322 ms 29288 KB Output is correct
71 Correct 293 ms 29300 KB Output is correct
72 Correct 320 ms 36900 KB Output is correct
73 Correct 277 ms 28908 KB Output is correct
74 Correct 224 ms 29336 KB Output is correct
75 Correct 264 ms 37552 KB Output is correct
76 Correct 298 ms 31372 KB Output is correct
77 Correct 227 ms 35928 KB Output is correct
78 Correct 239 ms 35412 KB Output is correct
79 Correct 276 ms 35884 KB Output is correct
80 Correct 219 ms 35640 KB Output is correct
81 Correct 351 ms 28188 KB Output is correct
82 Correct 335 ms 28288 KB Output is correct
83 Correct 306 ms 35968 KB Output is correct
84 Correct 234 ms 34204 KB Output is correct
85 Correct 347 ms 28344 KB Output is correct
86 Correct 336 ms 35936 KB Output is correct
87 Correct 288 ms 36016 KB Output is correct
88 Correct 248 ms 30084 KB Output is correct
89 Correct 297 ms 29356 KB Output is correct
90 Correct 340 ms 29544 KB Output is correct
91 Correct 329 ms 29232 KB Output is correct
92 Correct 345 ms 29268 KB Output is correct
93 Correct 374 ms 29372 KB Output is correct
94 Correct 290 ms 29232 KB Output is correct
95 Correct 245 ms 32948 KB Output is correct
96 Correct 204 ms 37484 KB Output is correct
97 Correct 227 ms 22280 KB Output is correct
98 Correct 264 ms 29336 KB Output is correct
99 Correct 264 ms 29412 KB Output is correct
100 Correct 104 ms 14496 KB Output is correct
101 Correct 345 ms 29428 KB Output is correct
102 Correct 297 ms 27552 KB Output is correct
103 Correct 319 ms 28356 KB Output is correct
104 Correct 348 ms 29716 KB Output is correct