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Submission #887315

# Submission time Handle Problem Language Result Execution time Memory
887315 2023-12-14T09:01:07 Z chanhchuong123 Janjetina (COCI21_janjetina) C++14
110 / 110
 283 ms 15564 KB 
#include <bits/stdc++.h>
using namespace std;
#define task "HOTPOT"
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()

const int MAX = 100010;
int sz[MAX];
int nNode, k;
int bit[MAX];
bool rem[MAX];
long long res = 0;
vector<pair<int, int>> adj[MAX];

void update(int id, int delta) {
    for (++id; id < MAX; id += id & -id)
        bit[id] += delta;
}

int get(int id) {
    int res = 0;
    id = min(id, MAX - 1);
    for (++id; id > 0; id -= id & -id)
        res += bit[id];
    return  res;
}



int dfsSZ(int u, int p) {
    sz[u] = 1;
    for (auto [v, w]: adj[u]) if (v != p && !rem[v]) {
        sz[u] += dfsSZ(v, u);
    }
    return sz[u];
}

int findCentroid(int u, int p, int n) {
    for (auto [v, w]: adj[u]) if (v != p && !rem[v]) {
        if ((sz[v] << 1) > n)
            return findCentroid(v, u, n);
    }
    return u;
}

vector<pair<int, int>> nodes;

void dfs(int u, int p, int mxx, int dep) {
    nodes.emplace_back(mxx, dep);
    for (auto [v, w]: adj[u]) if (v != p && !rem[v])
        dfs(v, u, max(mxx, w), dep + 1);
}

void solve(int u, int p) {
    int c = findCentroid(u, p, dfsSZ(u, p)); rem[c] = true;

    nodes.clear();
    dfs(c, p, 0, 0);
    sort(all(nodes));
    for (auto [mxx, dep]: nodes) {
        int maxL = mxx - k - dep;
        res += get(maxL);
        update(dep, +1);
    }
    for (auto [mxx, dep]: nodes) {
        update(dep, -1);
    }

    for (auto [v, w]: adj[c]) if (v != p && !rem[v]) {
        nodes.clear();
        dfs(v, p, w, 1);
        sort(all(nodes));
        for (auto [mxx, dep]: nodes) {
            int maxL = mxx - k - dep;
            res -= get(maxL);
            update(dep, +1);
        }
        for (auto [mxx, dep]: nodes) {
            update(dep, -1);
        }
    }

    for (auto [v, w]: adj[c]) if (v != p && !rem[v]) {
        solve(v, c);
    }
}

int main() {
	ios_base::sync_with_stdio(false); cin.tie(nullptr);

	if (fopen(task".inp", "r")) {
		freopen(task".inp", "r",  stdin);
		freopen(task".out", "w", stdout);
	}

    cin >> nNode >> k;
    for (int i = 1; i < nNode; ++i) {
        int u, v, w; cin >> u >> v >> w;
        adj[u].emplace_back(v, w);
        adj[v].emplace_back(u, w);
    }
    solve(1, -1);
    cout << res * 2;

	return 0;
}

Compilation message

Main.cpp: In function 'int dfsSZ(int, int)':
Main.cpp:32:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   32 |     for (auto [v, w]: adj[u]) if (v != p && !rem[v]) {
      |               ^
Main.cpp: In function 'int findCentroid(int, int, int)':
Main.cpp:39:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   39 |     for (auto [v, w]: adj[u]) if (v != p && !rem[v]) {
      |               ^
Main.cpp: In function 'void dfs(int, int, int, int)':
Main.cpp:50:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   50 |     for (auto [v, w]: adj[u]) if (v != p && !rem[v])
      |               ^
Main.cpp: In function 'void solve(int, int)':
Main.cpp:60:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   60 |     for (auto [mxx, dep]: nodes) {
      |               ^
Main.cpp:65:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   65 |     for (auto [mxx, dep]: nodes) {
      |               ^
Main.cpp:69:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   69 |     for (auto [v, w]: adj[c]) if (v != p && !rem[v]) {
      |               ^
Main.cpp:73:19: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   73 |         for (auto [mxx, dep]: nodes) {
      |                   ^
Main.cpp:78:19: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   78 |         for (auto [mxx, dep]: nodes) {
      |                   ^
Main.cpp:83:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   83 |     for (auto [v, w]: adj[c]) if (v != p && !rem[v]) {
      |               ^
Main.cpp: In function 'int main()':
Main.cpp:92:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   92 |   freopen(task".inp", "r",  stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:93:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   93 |   freopen(task".out", "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2648 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 2 ms 2908 KB Output is correct
5 Correct 2 ms 2908 KB Output is correct
6 Correct 2 ms 2904 KB Output is correct
7 Correct 2 ms 2908 KB Output is correct
8 Correct 2 ms 2904 KB Output is correct
9 Correct 1 ms 2908 KB Output is correct
10 Correct 1 ms 2908 KB Output is correct
11 Correct 2 ms 2908 KB Output is correct
12 Correct 2 ms 2908 KB Output is correct
13 Correct 2 ms 2908 KB Output is correct
14 Correct 2 ms 2908 KB Output is correct
15 Correct 2 ms 2908 KB Output is correct
16 Correct 2 ms 2908 KB Output is correct
17 Correct 2 ms 2904 KB Output is correct
18 Correct 2 ms 2908 KB Output is correct
19 Correct 2 ms 2816 KB Output is correct
20 Correct 2 ms 2908 KB Output is correct
21 Correct 2 ms 2908 KB Output is correct
22 Correct 3 ms 2824 KB Output is correct

Subtask #2
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2648 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2812 KB Output is correct
4 Correct 2 ms 2908 KB Output is correct
5 Correct 18 ms 4196 KB Output is correct
6 Correct 123 ms 9140 KB Output is correct
7 Correct 219 ms 14784 KB Output is correct
8 Correct 246 ms 15056 KB Output is correct
9 Correct 232 ms 14796 KB Output is correct
10 Correct 277 ms 14820 KB Output is correct
11 Correct 220 ms 14788 KB Output is correct
12 Correct 247 ms 15036 KB Output is correct
13 Correct 237 ms 15048 KB Output is correct
14 Correct 267 ms 14788 KB Output is correct
15 Correct 270 ms 14792 KB Output is correct
16 Correct 260 ms 15308 KB Output is correct
17 Correct 272 ms 15508 KB Output is correct
18 Correct 283 ms 15304 KB Output is correct

Subtask #3
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2648 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 2 ms 2908 KB Output is correct
5 Correct 2 ms 2908 KB Output is correct
6 Correct 2 ms 2904 KB Output is correct
7 Correct 2 ms 2908 KB Output is correct
8 Correct 2 ms 2904 KB Output is correct
9 Correct 1 ms 2908 KB Output is correct
10 Correct 1 ms 2908 KB Output is correct
11 Correct 2 ms 2908 KB Output is correct
12 Correct 2 ms 2908 KB Output is correct
13 Correct 2 ms 2908 KB Output is correct
14 Correct 2 ms 2908 KB Output is correct
15 Correct 2 ms 2908 KB Output is correct
16 Correct 2 ms 2908 KB Output is correct
17 Correct 2 ms 2904 KB Output is correct
18 Correct 2 ms 2908 KB Output is correct
19 Correct 2 ms 2816 KB Output is correct
20 Correct 2 ms 2908 KB Output is correct
21 Correct 2 ms 2908 KB Output is correct
22 Correct 3 ms 2824 KB Output is correct
23 Correct 1 ms 2648 KB Output is correct
24 Correct 1 ms 2652 KB Output is correct
25 Correct 1 ms 2812 KB Output is correct
26 Correct 2 ms 2908 KB Output is correct
27 Correct 18 ms 4196 KB Output is correct
28 Correct 123 ms 9140 KB Output is correct
29 Correct 219 ms 14784 KB Output is correct
30 Correct 246 ms 15056 KB Output is correct
31 Correct 232 ms 14796 KB Output is correct
32 Correct 277 ms 14820 KB Output is correct
33 Correct 220 ms 14788 KB Output is correct
34 Correct 247 ms 15036 KB Output is correct
35 Correct 237 ms 15048 KB Output is correct
36 Correct 267 ms 14788 KB Output is correct
37 Correct 270 ms 14792 KB Output is correct
38 Correct 260 ms 15308 KB Output is correct
39 Correct 272 ms 15508 KB Output is correct
40 Correct 283 ms 15304 KB Output is correct
41 Correct 1 ms 2652 KB Output is correct
42 Correct 223 ms 15036 KB Output is correct
43 Correct 254 ms 15564 KB Output is correct
44 Correct 254 ms 15160 KB Output is correct
45 Correct 276 ms 15464 KB Output is correct
46 Correct 275 ms 15084 KB Output is correct
47 Correct 269 ms 15428 KB Output is correct
48 Correct 238 ms 15236 KB Output is correct
49 Correct 275 ms 15308 KB Output is correct
50 Correct 270 ms 15348 KB Output is correct
51 Correct 264 ms 15304 KB Output is correct
52 Correct 91 ms 9940 KB Output is correct
53 Correct 95 ms 10184 KB Output is correct
54 Correct 71 ms 9684 KB Output is correct
55 Correct 105 ms 10188 KB Output is correct
56 Correct 100 ms 10188 KB Output is correct
57 Correct 209 ms 9424 KB Output is correct
58 Correct 224 ms 9676 KB Output is correct
59 Correct 207 ms 9936 KB Output is correct
60 Correct 235 ms 9684 KB Output is correct
61 Correct 234 ms 9788 KB Output is correct
62 Correct 190 ms 9568 KB Output is correct
63 Correct 195 ms 9676 KB Output is correct
64 Correct 220 ms 9676 KB Output is correct
65 Correct 8 ms 3160 KB Output is correct
66 Correct 1 ms 2648 KB Output is correct