oj.uz

Submission #697079

# Submission time Handle Problem Language Result Execution time Memory
697079 2023-02-08T07:42:40 Z baojiaopisu Parkovi (COCI22_parkovi) C++17
110 / 110
 1282 ms 37480 KB 
#include<bits/stdc++.h>

using namespace std;

using ll = long long;
using ld = long double;
using ull = unsigned long long;

using pii = pair<int, int>;
using pll = pair<ll, ll>;
using pld = pair<ld, ld>;

#define fi first
#define se second
#define left BAO
#define right ANH
#define pb push_back
#define pf push_front
#define mp make_pair
#define ins insert
#define btpc __builtin_popcount
#define btclz __builtin_clz

#define sz(x) (int)(x.size());
#define all(x) x.begin(), x.end()
#define debug(...) " [" << #__VA_ARGS__ ": " << (__VA_ARGS__) << "] "

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

int d4x[4] = {1, 0, -1, 0}; int d4y[4] = {0, 1, 0, -1};
int d8x[8] = {0, 1, 1, 1, 0, -1, -1, -1};
int d8y[8] = {1, 1, 0, -1, -1, -1, 0, 1};

template<class X, class Y>
    bool minimize(X &x, const Y &y) {
        if (x > y)
        {
            x = y;
            return true;
        }
        return false;
    }
template<class X, class Y>
    bool maximize(X &x, const Y &y) {
        if (x < y)
        {
            x = y;
            return true;
        }
        return false;
    }

const int MOD = 1e9 + 7; //998244353

template<class X, class Y>
	void add(X &x, const Y &y) {
		x = (x + y);
		if(x >= MOD) x -= MOD;
	}

template<class X, class Y> 
	void sub(X &x, const Y &y) {
		x = (x - y);
		if(x < 0) x += MOD;
	}

/* Author : Le Ngoc Bao Anh, 12A5, LQD High School for Gifted Student*/

const ll INF = 1e9;
const int N = 2e5 + 10;

vector<pii> g[N];
ll t[N];
bool used[N], ok[N];
int cnt = 0;

void dfs(int u, int par, ll wpar, ll lim) {
	ll r = 0, c = 0;
	t[u] = ok[u] = 0;
	for(auto [v, w] : g[u]) {
		if(v != par) {
			dfs(v, u, w, lim);
			if(t[v] - w >= 0) ok[u] = true;
			if(ok[v]) maximize(r, t[v] - w);
			else maximize(c, (-t[v]) + w);
		}
	}

	if(r >= c) t[u] = r;
	else {
		t[u] = -c;
		ok[u] = false;
	}

	if(u == 1 && !ok[u]) {
		used[u] = 1;
		++cnt;
		return;
	}

	if(!ok[u] && -(t[u] - wpar) > lim) {
		t[u] = lim;
		ok[u] = true;
		used[u] = true;
		++cnt;
	}
}

void BaoJiaoPisu() {
	int n, k; cin >> n >> k;
	for(int i = 1; i < n; i++) {
		int u, v, w; cin >> u >> v >> w;
		g[u].pb(mp(v, w));
		g[v].pb(mp(u, w));
	}

	if(k == n) {
		cout << 0 << '\n';
		for(int i = 1; i <= n; i++) cout << i << " ";
		return;
	}

	vector<int> ans;
	ll l = 1, r = INF * n, res = -1;
	while(l <= r) {
		ll mid = (l + r) >> 1;
		for(int i = 1; i <= n; i++) used[i] = false;
			
		cnt = 0;
		dfs(1, 0, 0, mid);
		
		if(cnt <= k) {
			ans.clear();
			res = mid;
			for(int i = 1; i <= n; i++) {
				if(used[i]) ans.pb(i);
			}

			for(int i = 1; i <= n; i++) {
				if(!used[i] && ans.size() < k) ans.pb(i);
			}
			r = mid - 1;
		} else l = mid + 1;
	}

	cout << res << '\n';
	for(auto x : ans) cout << x << " ";
}

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

    int tc = 1, ddd = 0;
    // cin >> tc;
    while(tc--) {
        //ddd++;
        //cout << "Case #" << ddd << ": ";
        BaoJiaoPisu();
    }
}

Compilation message

Main.cpp: In function 'void BaoJiaoPisu()':
Main.cpp:140:31: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  140 |     if(!used[i] && ans.size() < k) ans.pb(i);
      |                    ~~~~~~~~~~~^~~
Main.cpp: In function 'int main()':
Main.cpp:154:17: warning: unused variable 'ddd' [-Wunused-variable]
  154 |     int tc = 1, ddd = 0;
      |                 ^~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 4 ms 4948 KB Output is correct
6 Correct 3 ms 4960 KB Output is correct
7 Correct 4 ms 5076 KB Output is correct
8 Correct 2 ms 5040 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 5036 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 2 ms 5036 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 2 ms 4948 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 430 ms 33264 KB Output is correct
2 Correct 402 ms 34036 KB Output is correct
3 Correct 374 ms 14784 KB Output is correct
4 Correct 1080 ms 13840 KB Output is correct
5 Correct 1059 ms 13640 KB Output is correct
6 Correct 1020 ms 13576 KB Output is correct
7 Correct 1046 ms 13648 KB Output is correct
8 Correct 1185 ms 14112 KB Output is correct
9 Correct 1117 ms 13872 KB Output is correct
10 Correct 1016 ms 14088 KB Output is correct
11 Correct 703 ms 15544 KB Output is correct
12 Correct 713 ms 15884 KB Output is correct
13 Correct 826 ms 16916 KB Output is correct
14 Correct 720 ms 15712 KB Output is correct
15 Correct 726 ms 15152 KB Output is correct
16 Correct 743 ms 15932 KB Output is correct
17 Correct 745 ms 15180 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 404 ms 34556 KB Output is correct
2 Correct 416 ms 33732 KB Output is correct
3 Correct 380 ms 32168 KB Output is correct
4 Correct 377 ms 32204 KB Output is correct
5 Correct 413 ms 35232 KB Output is correct
6 Correct 483 ms 34560 KB Output is correct
7 Correct 501 ms 35664 KB Output is correct
8 Correct 435 ms 34732 KB Output is correct
9 Correct 465 ms 34484 KB Output is correct
10 Correct 390 ms 33888 KB Output is correct
11 Correct 408 ms 32812 KB Output is correct
12 Correct 513 ms 36368 KB Output is correct
13 Correct 529 ms 36320 KB Output is correct
14 Correct 465 ms 35276 KB Output is correct
15 Correct 409 ms 33948 KB Output is correct
16 Correct 379 ms 32672 KB Output is correct
17 Correct 414 ms 32440 KB Output is correct
18 Correct 406 ms 34152 KB Output is correct
19 Correct 418 ms 34500 KB Output is correct
20 Correct 445 ms 34888 KB Output is correct
21 Correct 423 ms 34228 KB Output is correct

Subtask #4
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 4 ms 4948 KB Output is correct
6 Correct 3 ms 4960 KB Output is correct
7 Correct 4 ms 5076 KB Output is correct
8 Correct 2 ms 5040 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 5036 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 2 ms 5036 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 2 ms 4948 KB Output is correct
15 Correct 430 ms 33264 KB Output is correct
16 Correct 402 ms 34036 KB Output is correct
17 Correct 374 ms 14784 KB Output is correct
18 Correct 1080 ms 13840 KB Output is correct
19 Correct 1059 ms 13640 KB Output is correct
20 Correct 1020 ms 13576 KB Output is correct
21 Correct 1046 ms 13648 KB Output is correct
22 Correct 1185 ms 14112 KB Output is correct
23 Correct 1117 ms 13872 KB Output is correct
24 Correct 1016 ms 14088 KB Output is correct
25 Correct 703 ms 15544 KB Output is correct
26 Correct 713 ms 15884 KB Output is correct
27 Correct 826 ms 16916 KB Output is correct
28 Correct 720 ms 15712 KB Output is correct
29 Correct 726 ms 15152 KB Output is correct
30 Correct 743 ms 15932 KB Output is correct
31 Correct 745 ms 15180 KB Output is correct
32 Correct 404 ms 34556 KB Output is correct
33 Correct 416 ms 33732 KB Output is correct
34 Correct 380 ms 32168 KB Output is correct
35 Correct 377 ms 32204 KB Output is correct
36 Correct 413 ms 35232 KB Output is correct
37 Correct 483 ms 34560 KB Output is correct
38 Correct 501 ms 35664 KB Output is correct
39 Correct 435 ms 34732 KB Output is correct
40 Correct 465 ms 34484 KB Output is correct
41 Correct 390 ms 33888 KB Output is correct
42 Correct 408 ms 32812 KB Output is correct
43 Correct 513 ms 36368 KB Output is correct
44 Correct 529 ms 36320 KB Output is correct
45 Correct 465 ms 35276 KB Output is correct
46 Correct 409 ms 33948 KB Output is correct
47 Correct 379 ms 32672 KB Output is correct
48 Correct 414 ms 32440 KB Output is correct
49 Correct 406 ms 34152 KB Output is correct
50 Correct 418 ms 34500 KB Output is correct
51 Correct 445 ms 34888 KB Output is correct
52 Correct 423 ms 34228 KB Output is correct
53 Correct 1117 ms 15440 KB Output is correct
54 Correct 1067 ms 15704 KB Output is correct
55 Correct 1237 ms 16084 KB Output is correct
56 Correct 1258 ms 15952 KB Output is correct
57 Correct 1261 ms 16616 KB Output is correct
58 Correct 1135 ms 15520 KB Output is correct
59 Correct 1248 ms 17928 KB Output is correct
60 Correct 1213 ms 16068 KB Output is correct
61 Correct 994 ms 15224 KB Output is correct
62 Correct 1036 ms 16300 KB Output is correct
63 Correct 1277 ms 16092 KB Output is correct
64 Correct 1155 ms 17536 KB Output is correct
65 Correct 1191 ms 15820 KB Output is correct
66 Correct 1087 ms 16460 KB Output is correct
67 Correct 1074 ms 15240 KB Output is correct
68 Correct 1282 ms 17976 KB Output is correct
69 Correct 425 ms 35668 KB Output is correct
70 Correct 411 ms 34144 KB Output is correct
71 Correct 499 ms 37480 KB Output is correct
72 Correct 292 ms 15928 KB Output is correct
73 Correct 328 ms 16144 KB Output is correct
74 Correct 358 ms 17872 KB Output is correct
75 Correct 724 ms 17888 KB Output is correct
76 Correct 807 ms 18320 KB Output is correct
77 Correct 735 ms 17716 KB Output is correct
78 Correct 773 ms 18180 KB Output is correct