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Submission #1004621

# Submission time Handle Problem Language Result Execution time Memory
1004621 2024-06-21T10:45:29 Z vjudge1 Parkovi (COCI22_parkovi) C++17
110 / 110
 1493 ms 44488 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 3 ms 4956 KB Output is correct
2 Correct 2 ms 4952 KB Output is correct
3 Correct 2 ms 4956 KB Output is correct
4 Correct 2 ms 5144 KB Output is correct
5 Correct 2 ms 4956 KB Output is correct
6 Correct 2 ms 5184 KB Output is correct
7 Correct 3 ms 4956 KB Output is correct
8 Correct 2 ms 4952 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 3 ms 4956 KB Output is correct
13 Correct 3 ms 4956 KB Output is correct
14 Correct 3 ms 4956 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 300 ms 38272 KB Output is correct
2 Correct 352 ms 40272 KB Output is correct
3 Correct 168 ms 24516 KB Output is correct
4 Correct 831 ms 22856 KB Output is correct
5 Correct 820 ms 21280 KB Output is correct
6 Correct 686 ms 21328 KB Output is correct
7 Correct 810 ms 21328 KB Output is correct
8 Correct 945 ms 22460 KB Output is correct
9 Correct 946 ms 22576 KB Output is correct
10 Correct 1000 ms 22920 KB Output is correct
11 Correct 506 ms 24400 KB Output is correct
12 Correct 548 ms 24148 KB Output is correct
13 Correct 575 ms 26196 KB Output is correct
14 Correct 410 ms 23124 KB Output is correct
15 Correct 449 ms 22644 KB Output is correct
16 Correct 467 ms 24144 KB Output is correct
17 Correct 458 ms 23380 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 334 ms 41724 KB Output is correct
2 Correct 334 ms 40020 KB Output is correct
3 Correct 312 ms 38004 KB Output is correct
4 Correct 318 ms 35664 KB Output is correct
5 Correct 374 ms 43596 KB Output is correct
6 Correct 397 ms 42800 KB Output is correct
7 Correct 373 ms 44276 KB Output is correct
8 Correct 347 ms 40528 KB Output is correct
9 Correct 330 ms 40372 KB Output is correct
10 Correct 337 ms 39508 KB Output is correct
11 Correct 298 ms 38380 KB Output is correct
12 Correct 335 ms 44488 KB Output is correct
13 Correct 404 ms 44220 KB Output is correct
14 Correct 369 ms 43092 KB Output is correct
15 Correct 324 ms 39248 KB Output is correct
16 Correct 299 ms 37692 KB Output is correct
17 Correct 317 ms 37712 KB Output is correct
18 Correct 346 ms 39404 KB Output is correct
19 Correct 314 ms 41264 KB Output is correct
20 Correct 355 ms 42476 KB Output is correct
21 Correct 308 ms 41164 KB Output is correct

Subtask #4
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4956 KB Output is correct
2 Correct 2 ms 4952 KB Output is correct
3 Correct 2 ms 4956 KB Output is correct
4 Correct 2 ms 5144 KB Output is correct
5 Correct 2 ms 4956 KB Output is correct
6 Correct 2 ms 5184 KB Output is correct
7 Correct 3 ms 4956 KB Output is correct
8 Correct 2 ms 4952 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 3 ms 4956 KB Output is correct
13 Correct 3 ms 4956 KB Output is correct
14 Correct 3 ms 4956 KB Output is correct
15 Correct 300 ms 38272 KB Output is correct
16 Correct 352 ms 40272 KB Output is correct
17 Correct 168 ms 24516 KB Output is correct
18 Correct 831 ms 22856 KB Output is correct
19 Correct 820 ms 21280 KB Output is correct
20 Correct 686 ms 21328 KB Output is correct
21 Correct 810 ms 21328 KB Output is correct
22 Correct 945 ms 22460 KB Output is correct
23 Correct 946 ms 22576 KB Output is correct
24 Correct 1000 ms 22920 KB Output is correct
25 Correct 506 ms 24400 KB Output is correct
26 Correct 548 ms 24148 KB Output is correct
27 Correct 575 ms 26196 KB Output is correct
28 Correct 410 ms 23124 KB Output is correct
29 Correct 449 ms 22644 KB Output is correct
30 Correct 467 ms 24144 KB Output is correct
31 Correct 458 ms 23380 KB Output is correct
32 Correct 334 ms 41724 KB Output is correct
33 Correct 334 ms 40020 KB Output is correct
34 Correct 312 ms 38004 KB Output is correct
35 Correct 318 ms 35664 KB Output is correct
36 Correct 374 ms 43596 KB Output is correct
37 Correct 397 ms 42800 KB Output is correct
38 Correct 373 ms 44276 KB Output is correct
39 Correct 347 ms 40528 KB Output is correct
40 Correct 330 ms 40372 KB Output is correct
41 Correct 337 ms 39508 KB Output is correct
42 Correct 298 ms 38380 KB Output is correct
43 Correct 335 ms 44488 KB Output is correct
44 Correct 404 ms 44220 KB Output is correct
45 Correct 369 ms 43092 KB Output is correct
46 Correct 324 ms 39248 KB Output is correct
47 Correct 299 ms 37692 KB Output is correct
48 Correct 317 ms 37712 KB Output is correct
49 Correct 346 ms 39404 KB Output is correct
50 Correct 314 ms 41264 KB Output is correct
51 Correct 355 ms 42476 KB Output is correct
52 Correct 308 ms 41164 KB Output is correct
53 Correct 822 ms 22868 KB Output is correct
54 Correct 815 ms 23380 KB Output is correct
55 Correct 845 ms 24252 KB Output is correct
56 Correct 753 ms 25252 KB Output is correct
57 Correct 844 ms 26456 KB Output is correct
58 Correct 1039 ms 23076 KB Output is correct
59 Correct 1493 ms 27844 KB Output is correct
60 Correct 1176 ms 22924 KB Output is correct
61 Correct 913 ms 21316 KB Output is correct
62 Correct 1091 ms 24184 KB Output is correct
63 Correct 1196 ms 22992 KB Output is correct
64 Correct 1028 ms 25912 KB Output is correct
65 Correct 1039 ms 23064 KB Output is correct
66 Correct 1188 ms 25144 KB Output is correct
67 Correct 879 ms 22184 KB Output is correct
68 Correct 1080 ms 27424 KB Output is correct
69 Correct 318 ms 40368 KB Output is correct
70 Correct 292 ms 38064 KB Output is correct
71 Correct 373 ms 43676 KB Output is correct
72 Correct 155 ms 23484 KB Output is correct
73 Correct 153 ms 23872 KB Output is correct
74 Correct 161 ms 27072 KB Output is correct
75 Correct 537 ms 25172 KB Output is correct
76 Correct 540 ms 24720 KB Output is correct
77 Correct 426 ms 24416 KB Output is correct
78 Correct 450 ms 26392 KB Output is correct