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Submission #1004617

# Submission time Handle Problem Language Result Execution time Memory
1004617 2024-06-21T10:44:20 Z Whisper Parkovi (COCI22_parkovi) C++17
110 / 110
 1056 ms 44996 KB 
#include <bits/stdc++.h>

using namespace std;
using ll = long long;

#define int long long
#define FOR(i, a, b) for (int i = (a); i <= (b); i++)
#define FORD(i, a, b) for (int i = (b); i >= (a); i --)
#define REP(i, n) for (int i = 0; i < (n); ++i)
#define REPD(i, n) for (int i = (n) - 1; i >= 0; --i)

#define MASK(i) (1LL << (i))
#define BIT(x, i) (((x) >> (i)) & 1)


constexpr ll LINF = (1ll << 60);
constexpr int INF = (1ll << 30);
constexpr int Mod = 1e9 + 7;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

/*
    Phu Trong from Nguyen Tat Thanh High School for gifted student
*/

template <class X, class Y>
    bool minimize(X &x, const Y &y){
        X eps = 1e-9;
        if (x > y + eps) {x = y; return 1;}
        return 0;
    }

template <class X, class Y>
    bool maximize(X &x, const Y &y){
        X eps = 1e-9;
        if (x + eps < y) {x = y; return 1;}
        return 0;
    }
#define MAX     200005
struct Edge{
    int u, v, w;
    Edge(){}
    Edge(int _u, int _v, int _w): u(_u), v(_v), w(_w){}

    int other(int x){return (x ^ u ^ v);}
} edge[MAX];

int numNode, k;
vector<int> G[MAX];

void loadGraph(void){
    cin >> numNode >> k;
    for (int i = 1; i < numNode; ++i){
        cin >> edge[i].u >> edge[i].v >> edge[i].w;
        G[edge[i].u].emplace_back(i);
        G[edge[i].v].emplace_back(i);
    }
}

int minDist[MAX], maxReach[MAX];

vector<int> candidate;

void dfs(int u, int p, int d){
    for (int &i : G[u]){
        int v = edge[i].other(u);
        if(v ^ p){
            dfs(v, u, d);
            if (maxReach[v] + min(edge[i].w, minDist[v]) <= d){
                if (maxReach[v] + minDist[v] > d)
                    maximize(maxReach[u], maxReach[v] + edge[i].w);
                minimize(minDist[u], minDist[v] + edge[i].w);
            }
            else{
                candidate.emplace_back(v);
                minimize(minDist[u], edge[i].w);
            }
        }
    }
}

bool check(int d){
    candidate.clear();
    memset(maxReach, 0, (numNode + 1) * sizeof(int));
    memset(minDist, 0x3f, (numNode + 1) * sizeof(int));
    dfs(1, -1, d);
    if (maxReach[1] + minDist[1] > d) candidate.push_back(1);
    return (int)candidate.size() <= k;
}


int chosen[MAX];
void process(void){
    int l = 0, r = 1e15;
    while(r - l > 1){
        int m = (l + r) >> 1;
        if(check(m)) r = m;
        else l = m;
    }

    cout << r << '\n';
    check(r);
    for (int& v : candidate) chosen[v] = 1;
    for (int i = 1; i <= numNode; ++i) {
        if(!chosen[i] && (int)candidate.size() < k)
            candidate.push_back(i);
    }
    for (int &v : candidate) cout << v << " ";
}
signed main(){
    #define name "Whisper"
    cin.tie(nullptr) -> sync_with_stdio(false);
    //freopen(name".inp", "r", stdin);
    //freopen(name".out", "w", stdout);
    loadGraph();
    process();
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 2 ms 5188 KB Output is correct
3 Correct 2 ms 4956 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 3 ms 4956 KB Output is correct
6 Correct 2 ms 4952 KB Output is correct
7 Correct 2 ms 4956 KB Output is correct
8 Correct 2 ms 5184 KB Output is correct
9 Correct 2 ms 4956 KB Output is correct
10 Correct 2 ms 4956 KB Output is correct
11 Correct 2 ms 4956 KB Output is correct
12 Correct 2 ms 4956 KB Output is correct
13 Correct 2 ms 4956 KB Output is correct
14 Correct 2 ms 4956 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 273 ms 38748 KB Output is correct
2 Correct 300 ms 41108 KB Output is correct
3 Correct 162 ms 25416 KB Output is correct
4 Correct 725 ms 23620 KB Output is correct
5 Correct 654 ms 23012 KB Output is correct
6 Correct 670 ms 23128 KB Output is correct
7 Correct 685 ms 22096 KB Output is correct
8 Correct 664 ms 22608 KB Output is correct
9 Correct 757 ms 22868 KB Output is correct
10 Correct 681 ms 23384 KB Output is correct
11 Correct 437 ms 25020 KB Output is correct
12 Correct 345 ms 24916 KB Output is correct
13 Correct 384 ms 26892 KB Output is correct
14 Correct 357 ms 23540 KB Output is correct
15 Correct 332 ms 22864 KB Output is correct
16 Correct 349 ms 24628 KB Output is correct
17 Correct 400 ms 23640 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 291 ms 41812 KB Output is correct
2 Correct 244 ms 40776 KB Output is correct
3 Correct 297 ms 38744 KB Output is correct
4 Correct 233 ms 35676 KB Output is correct
5 Correct 333 ms 44180 KB Output is correct
6 Correct 319 ms 43400 KB Output is correct
7 Correct 339 ms 44996 KB Output is correct
8 Correct 293 ms 41296 KB Output is correct
9 Correct 303 ms 40992 KB Output is correct
10 Correct 298 ms 40268 KB Output is correct
11 Correct 267 ms 38736 KB Output is correct
12 Correct 362 ms 44996 KB Output is correct
13 Correct 347 ms 44668 KB Output is correct
14 Correct 365 ms 43468 KB Output is correct
15 Correct 266 ms 39504 KB Output is correct
16 Correct 249 ms 38224 KB Output is correct
17 Correct 282 ms 37952 KB Output is correct
18 Correct 324 ms 39764 KB Output is correct
19 Correct 286 ms 41880 KB Output is correct
20 Correct 343 ms 42692 KB Output is correct
21 Correct 308 ms 41680 KB Output is correct

Subtask #4
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 2 ms 5188 KB Output is correct
3 Correct 2 ms 4956 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 3 ms 4956 KB Output is correct
6 Correct 2 ms 4952 KB Output is correct
7 Correct 2 ms 4956 KB Output is correct
8 Correct 2 ms 5184 KB Output is correct
9 Correct 2 ms 4956 KB Output is correct
10 Correct 2 ms 4956 KB Output is correct
11 Correct 2 ms 4956 KB Output is correct
12 Correct 2 ms 4956 KB Output is correct
13 Correct 2 ms 4956 KB Output is correct
14 Correct 2 ms 4956 KB Output is correct
15 Correct 273 ms 38748 KB Output is correct
16 Correct 300 ms 41108 KB Output is correct
17 Correct 162 ms 25416 KB Output is correct
18 Correct 725 ms 23620 KB Output is correct
19 Correct 654 ms 23012 KB Output is correct
20 Correct 670 ms 23128 KB Output is correct
21 Correct 685 ms 22096 KB Output is correct
22 Correct 664 ms 22608 KB Output is correct
23 Correct 757 ms 22868 KB Output is correct
24 Correct 681 ms 23384 KB Output is correct
25 Correct 437 ms 25020 KB Output is correct
26 Correct 345 ms 24916 KB Output is correct
27 Correct 384 ms 26892 KB Output is correct
28 Correct 357 ms 23540 KB Output is correct
29 Correct 332 ms 22864 KB Output is correct
30 Correct 349 ms 24628 KB Output is correct
31 Correct 400 ms 23640 KB Output is correct
32 Correct 291 ms 41812 KB Output is correct
33 Correct 244 ms 40776 KB Output is correct
34 Correct 297 ms 38744 KB Output is correct
35 Correct 233 ms 35676 KB Output is correct
36 Correct 333 ms 44180 KB Output is correct
37 Correct 319 ms 43400 KB Output is correct
38 Correct 339 ms 44996 KB Output is correct
39 Correct 293 ms 41296 KB Output is correct
40 Correct 303 ms 40992 KB Output is correct
41 Correct 298 ms 40268 KB Output is correct
42 Correct 267 ms 38736 KB Output is correct
43 Correct 362 ms 44996 KB Output is correct
44 Correct 347 ms 44668 KB Output is correct
45 Correct 365 ms 43468 KB Output is correct
46 Correct 266 ms 39504 KB Output is correct
47 Correct 249 ms 38224 KB Output is correct
48 Correct 282 ms 37952 KB Output is correct
49 Correct 324 ms 39764 KB Output is correct
50 Correct 286 ms 41880 KB Output is correct
51 Correct 343 ms 42692 KB Output is correct
52 Correct 308 ms 41680 KB Output is correct
53 Correct 751 ms 23540 KB Output is correct
54 Correct 778 ms 23888 KB Output is correct
55 Correct 849 ms 24860 KB Output is correct
56 Correct 880 ms 25992 KB Output is correct
57 Correct 903 ms 27024 KB Output is correct
58 Correct 715 ms 23628 KB Output is correct
59 Correct 987 ms 28596 KB Output is correct
60 Correct 939 ms 23376 KB Output is correct
61 Correct 639 ms 21588 KB Output is correct
62 Correct 837 ms 24600 KB Output is correct
63 Correct 1056 ms 23232 KB Output is correct
64 Correct 886 ms 26496 KB Output is correct
65 Correct 745 ms 23500 KB Output is correct
66 Correct 901 ms 25604 KB Output is correct
67 Correct 748 ms 22552 KB Output is correct
68 Correct 798 ms 28248 KB Output is correct
69 Correct 332 ms 41004 KB Output is correct
70 Correct 252 ms 38736 KB Output is correct
71 Correct 354 ms 44232 KB Output is correct
72 Correct 138 ms 24296 KB Output is correct
73 Correct 179 ms 24456 KB Output is correct
74 Correct 155 ms 27580 KB Output is correct
75 Correct 417 ms 25428 KB Output is correct
76 Correct 417 ms 25144 KB Output is correct
77 Correct 411 ms 24912 KB Output is correct
78 Correct 387 ms 26564 KB Output is correct