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Submission #527711

# Submission time Handle Problem Language Result Execution time Memory
527711 2022-02-18T04:48:40 Z joelau Parkovi (COCI22_parkovi) C++14
110 / 110
 1490 ms 33708 KB 
#include <bits/stdc++.h>
using namespace std;

long long N,K, dp1[200005], dp2[200005], val, inf = 1e18;
vector< pair<long long,long long> > lst[200005];
bitset<200005> ans;

void dfs (long long x, long long p) {
    dp1[x] = inf, dp2[x] = 0;
    for (auto v: lst[x]) if (v.first != p) {
        dfs(v.first,x);
        dp1[x] = min(dp1[x],dp1[v.first] + v.second);
        if (dp2[v.first] != -1) {
            if (dp2[v.first] + v.second > val) ans[v.first] = 1, dp1[x] = min(dp1[x],v.second);
            else dp2[x] = max(dp2[x],dp2[v.first] + v.second);
        }
    }
    if (dp1[x]+dp2[x] <= val) dp2[x] = -1;
}

int main() {
    ios_base::sync_with_stdio(false); cin.tie(NULL);
    cin >> N >> K;
    for (long long i = 0; i < N-1; ++i) {
        long long u,v,w; cin >> u >> v >> w; u--, v--;
        lst[u].emplace_back(v,w), lst[v].emplace_back(u,w);
    }
    long long low = -1, high = 2e14;
    while (high - low > 1) {
        val = (low+high)/2;
        ans.reset();
        dfs(0,-1);
        if (dp2[0] != -1) ans[0] = 1;
        if (ans.count() > K) low = val;
        else high = val;
    }
    cout << high << '\n';
    val = high;
    ans.reset();
    dfs(0,-1);
    if (dp2[0] != -1) ans[0] = 1;
    for (long long i = 0, num = ans.count(); i < N && num < K; ++i) if (!ans[i]) ans[i] = 1, num++;
    for (long long i = 0; i < N; ++i) if (ans[i]) cout << i+1 << ' ';

    return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:34:25: warning: comparison of integer expressions of different signedness: 'std::size_t' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   34 |         if (ans.count() > K) low = val;
      |             ~~~~~~~~~~~~^~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5028 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 5024 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 303 ms 31564 KB Output is correct
2 Correct 309 ms 32284 KB Output is correct
3 Correct 317 ms 17480 KB Output is correct
4 Correct 1305 ms 17776 KB Output is correct
5 Correct 1226 ms 20840 KB Output is correct
6 Correct 1219 ms 20932 KB Output is correct
7 Correct 1304 ms 19860 KB Output is correct
8 Correct 1310 ms 19228 KB Output is correct
9 Correct 1234 ms 17588 KB Output is correct
10 Correct 1302 ms 21244 KB Output is correct
11 Correct 882 ms 22300 KB Output is correct
12 Correct 778 ms 22452 KB Output is correct
13 Correct 922 ms 24132 KB Output is correct
14 Correct 863 ms 21276 KB Output is correct
15 Correct 851 ms 20804 KB Output is correct
16 Correct 849 ms 22264 KB Output is correct
17 Correct 834 ms 21520 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 343 ms 32840 KB Output is correct
2 Correct 314 ms 31996 KB Output is correct
3 Correct 297 ms 30788 KB Output is correct
4 Correct 302 ms 30564 KB Output is correct
5 Correct 376 ms 32720 KB Output is correct
6 Correct 447 ms 32336 KB Output is correct
7 Correct 434 ms 33432 KB Output is correct
8 Correct 376 ms 33324 KB Output is correct
9 Correct 310 ms 33208 KB Output is correct
10 Correct 336 ms 32576 KB Output is correct
11 Correct 352 ms 31000 KB Output is correct
12 Correct 401 ms 33576 KB Output is correct
13 Correct 432 ms 33708 KB Output is correct
14 Correct 396 ms 32968 KB Output is correct
15 Correct 319 ms 31900 KB Output is correct
16 Correct 320 ms 30884 KB Output is correct
17 Correct 314 ms 30800 KB Output is correct
18 Correct 337 ms 32196 KB Output is correct
19 Correct 330 ms 31792 KB Output is correct
20 Correct 353 ms 32516 KB Output is correct
21 Correct 304 ms 31832 KB Output is correct

Subtask #4
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5028 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 5024 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 303 ms 31564 KB Output is correct
16 Correct 309 ms 32284 KB Output is correct
17 Correct 317 ms 17480 KB Output is correct
18 Correct 1305 ms 17776 KB Output is correct
19 Correct 1226 ms 20840 KB Output is correct
20 Correct 1219 ms 20932 KB Output is correct
21 Correct 1304 ms 19860 KB Output is correct
22 Correct 1310 ms 19228 KB Output is correct
23 Correct 1234 ms 17588 KB Output is correct
24 Correct 1302 ms 21244 KB Output is correct
25 Correct 882 ms 22300 KB Output is correct
26 Correct 778 ms 22452 KB Output is correct
27 Correct 922 ms 24132 KB Output is correct
28 Correct 863 ms 21276 KB Output is correct
29 Correct 851 ms 20804 KB Output is correct
30 Correct 849 ms 22264 KB Output is correct
31 Correct 834 ms 21520 KB Output is correct
32 Correct 343 ms 32840 KB Output is correct
33 Correct 314 ms 31996 KB Output is correct
34 Correct 297 ms 30788 KB Output is correct
35 Correct 302 ms 30564 KB Output is correct
36 Correct 376 ms 32720 KB Output is correct
37 Correct 447 ms 32336 KB Output is correct
38 Correct 434 ms 33432 KB Output is correct
39 Correct 376 ms 33324 KB Output is correct
40 Correct 310 ms 33208 KB Output is correct
41 Correct 336 ms 32576 KB Output is correct
42 Correct 352 ms 31000 KB Output is correct
43 Correct 401 ms 33576 KB Output is correct
44 Correct 432 ms 33708 KB Output is correct
45 Correct 396 ms 32968 KB Output is correct
46 Correct 319 ms 31900 KB Output is correct
47 Correct 320 ms 30884 KB Output is correct
48 Correct 314 ms 30800 KB Output is correct
49 Correct 337 ms 32196 KB Output is correct
50 Correct 330 ms 31792 KB Output is correct
51 Correct 353 ms 32516 KB Output is correct
52 Correct 304 ms 31832 KB Output is correct
53 Correct 1406 ms 17456 KB Output is correct
54 Correct 1409 ms 17832 KB Output is correct
55 Correct 1490 ms 18372 KB Output is correct
56 Correct 1367 ms 18020 KB Output is correct
57 Correct 1387 ms 18324 KB Output is correct
58 Correct 1371 ms 17564 KB Output is correct
59 Correct 1480 ms 19196 KB Output is correct
60 Correct 1436 ms 18340 KB Output is correct
61 Correct 1216 ms 17144 KB Output is correct
62 Correct 1265 ms 17600 KB Output is correct
63 Correct 1338 ms 18420 KB Output is correct
64 Correct 1235 ms 18700 KB Output is correct
65 Correct 1316 ms 18076 KB Output is correct
66 Correct 1262 ms 18016 KB Output is correct
67 Correct 1211 ms 17244 KB Output is correct
68 Correct 1418 ms 19292 KB Output is correct
69 Correct 307 ms 32124 KB Output is correct
70 Correct 327 ms 30580 KB Output is correct
71 Correct 359 ms 33596 KB Output is correct
72 Correct 281 ms 16616 KB Output is correct
73 Correct 290 ms 17192 KB Output is correct
74 Correct 300 ms 17864 KB Output is correct
75 Correct 826 ms 19260 KB Output is correct
76 Correct 895 ms 20032 KB Output is correct
77 Correct 833 ms 19268 KB Output is correct
78 Correct 837 ms 19520 KB Output is correct