oj.uz

답안 #929069

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
929069 2024-02-17T16:12:03 Z a_l_i_r_e_z_a Janjetina (COCI21_janjetina) C++17
110 / 110
 499 ms 15832 KB 
// In the name of God
// Hope is last to die

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

#define pb push_back
// #define int long long    
#define S second
#define F first
#define mp make_pair
#define smax(x, y) (x) = max((x), (y))
#define smin(x, y) (x) = min((x), (y))
#define all(x) (x).begin(), (x).end()
#define len(x) ((int)(x).size())

const int maxn = 1e5 + 5;
const int inf = 1e9 + 7;
int n = 5, k = 1, sz[maxn], fen[maxn];
ll ans;
vector<pii> adj[maxn], vecf;
bool mark[maxn];

void upd(int i, int x){
    for(; i <= n; i += i & -i) fen[i] += x;
}

int get(int i){
    int res = 0;
    for(; i; i -= i & -i) res += fen[i];
    return res;
}

ll calc(vector<pii> vec){
    vector<int> h;
    h.pb(-inf);
    sort(all(vec));
    for(auto u: vec) h.pb(u.S);
    sort(all(h));
    h.resize(unique(all(h)) - h.begin());
    for(int i = 0; i < vec.size(); i++){
        int x = lower_bound(all(h), vec[i].S) - h.begin();
        upd(x, +1);
    }
    ll res = 0;
    for(int i = vec.size() - 1; i >= 0; i--){
        int x = lower_bound(all(h), vec[i].S) - h.begin();
        upd(x, -1);
        int j = upper_bound(all(h), vec[i].F - k - vec[i].S) - h.begin();
        j--;
        res += get(j);
    }
    return res;
}

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

int find(int v, int p, int s){
    for(auto [u, w]: adj[v]) if(u != p && !mark[u] && 2 * sz[u] > s) return find(u, v, s);
    return v;
}

void dfs(int v, int p, int h, int mx){
    vecf.pb(mp(mx, h));
    if(mx - k - h >= 0) ans++;
    for(auto [u, w]: adj[v]){
        if(u != p && !mark[u]){
            dfs(u, v, h + 1, max(mx, w));
        }
    }
}

void cd(int v){
    v = find(v, -1, get_sz(v));
    vector<pii> all;
    for(auto [u, w]: adj[v]){
        if(mark[u]) continue;
        vecf.clear();
        dfs(u, v, 1, w);
        ans -= calc(vecf);
        for(auto u: vecf) all.pb(u);
    }
    ans += calc(all);
    mark[v] = 1;
    for(auto [u, w]: adj[v]) if(!mark[u]) cd(u);
}

int32_t main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    cin >> n >> k;
    for(int i = 0; i < n - 1; i++){
        int u, v, w; cin >> u >> v >> w;
        adj[u].pb(mp(v, w));
        adj[v].pb(mp(u, w));
    }
    cd(1);
    cout << ans * 2 << '\n';

    return 0;
}

Compilation message

Main.cpp: In function 'll calc(std::vector<std::pair<int, int> >)':
Main.cpp:46:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |     for(int i = 0; i < vec.size(); i++){
      |                    ~~^~~~~~~~~~~~

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 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 3 ms 2904 KB Output is correct
5 Correct 3 ms 2908 KB Output is correct
6 Correct 3 ms 2940 KB Output is correct
7 Correct 3 ms 2904 KB Output is correct
8 Correct 3 ms 2904 KB Output is correct
9 Correct 2 ms 2652 KB Output is correct
10 Correct 1 ms 2652 KB Output is correct
11 Correct 2 ms 2652 KB Output is correct
12 Correct 2 ms 2652 KB Output is correct
13 Correct 3 ms 2648 KB Output is correct
14 Correct 2 ms 2652 KB Output is correct
15 Correct 2 ms 2652 KB Output is correct
16 Correct 2 ms 2904 KB Output is correct
17 Correct 2 ms 2652 KB Output is correct
18 Correct 2 ms 2652 KB Output is correct
19 Correct 2 ms 2652 KB Output is correct
20 Correct 2 ms 2648 KB Output is correct
21 Correct 2 ms 2896 KB Output is correct
22 Correct 2 ms 2652 KB Output is correct

Subtask #2
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 3 ms 2908 KB Output is correct
5 Correct 37 ms 3976 KB Output is correct
6 Correct 220 ms 9096 KB Output is correct
7 Correct 459 ms 15668 KB Output is correct
8 Correct 476 ms 15660 KB Output is correct
9 Correct 478 ms 15660 KB Output is correct
10 Correct 472 ms 15656 KB Output is correct
11 Correct 454 ms 15664 KB Output is correct
12 Correct 468 ms 15420 KB Output is correct
13 Correct 490 ms 15660 KB Output is correct
14 Correct 477 ms 15664 KB Output is correct
15 Correct 475 ms 15664 KB Output is correct
16 Correct 499 ms 15676 KB Output is correct
17 Correct 491 ms 15516 KB Output is correct
18 Correct 485 ms 15548 KB Output is correct

Subtask #3
60.0 / 60.0

# 결과 실행 시간 메모리 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 3 ms 2904 KB Output is correct
5 Correct 3 ms 2908 KB Output is correct
6 Correct 3 ms 2940 KB Output is correct
7 Correct 3 ms 2904 KB Output is correct
8 Correct 3 ms 2904 KB Output is correct
9 Correct 2 ms 2652 KB Output is correct
10 Correct 1 ms 2652 KB Output is correct
11 Correct 2 ms 2652 KB Output is correct
12 Correct 2 ms 2652 KB Output is correct
13 Correct 3 ms 2648 KB Output is correct
14 Correct 2 ms 2652 KB Output is correct
15 Correct 2 ms 2652 KB Output is correct
16 Correct 2 ms 2904 KB Output is correct
17 Correct 2 ms 2652 KB Output is correct
18 Correct 2 ms 2652 KB Output is correct
19 Correct 2 ms 2652 KB Output is correct
20 Correct 2 ms 2648 KB Output is correct
21 Correct 2 ms 2896 KB Output is correct
22 Correct 2 ms 2652 KB Output is correct
23 Correct 1 ms 2652 KB Output is correct
24 Correct 1 ms 2652 KB Output is correct
25 Correct 1 ms 2652 KB Output is correct
26 Correct 3 ms 2908 KB Output is correct
27 Correct 37 ms 3976 KB Output is correct
28 Correct 220 ms 9096 KB Output is correct
29 Correct 459 ms 15668 KB Output is correct
30 Correct 476 ms 15660 KB Output is correct
31 Correct 478 ms 15660 KB Output is correct
32 Correct 472 ms 15656 KB Output is correct
33 Correct 454 ms 15664 KB Output is correct
34 Correct 468 ms 15420 KB Output is correct
35 Correct 490 ms 15660 KB Output is correct
36 Correct 477 ms 15664 KB Output is correct
37 Correct 475 ms 15664 KB Output is correct
38 Correct 499 ms 15676 KB Output is correct
39 Correct 491 ms 15516 KB Output is correct
40 Correct 485 ms 15548 KB Output is correct
41 Correct 1 ms 2652 KB Output is correct
42 Correct 470 ms 15544 KB Output is correct
43 Correct 466 ms 15808 KB Output is correct
44 Correct 468 ms 15664 KB Output is correct
45 Correct 492 ms 15832 KB Output is correct
46 Correct 493 ms 15652 KB Output is correct
47 Correct 466 ms 15520 KB Output is correct
48 Correct 463 ms 15660 KB Output is correct
49 Correct 499 ms 15556 KB Output is correct
50 Correct 479 ms 15664 KB Output is correct
51 Correct 484 ms 15664 KB Output is correct
52 Correct 114 ms 9760 KB Output is correct
53 Correct 120 ms 9984 KB Output is correct
54 Correct 92 ms 9736 KB Output is correct
55 Correct 109 ms 9804 KB Output is correct
56 Correct 114 ms 9944 KB Output is correct
57 Correct 262 ms 9816 KB Output is correct
58 Correct 257 ms 9672 KB Output is correct
59 Correct 236 ms 9832 KB Output is correct
60 Correct 274 ms 9748 KB Output is correct
61 Correct 279 ms 9792 KB Output is correct
62 Correct 214 ms 9720 KB Output is correct
63 Correct 229 ms 9688 KB Output is correct
64 Correct 267 ms 9804 KB Output is correct
65 Correct 9 ms 3164 KB Output is correct
66 Correct 1 ms 2652 KB Output is correct