oj.uz

Submission #385227

# Submission time Handle Problem Language Result Execution time Memory
385227 2021-04-03T19:00:16 Z Return_0 Election Campaign (JOI15_election_campaign) C++17
100 / 100
 255 ms 45932 KB 
#pragma GCC optimize("Ofast,unroll-loops")
// #pragma comment(linker, "/stack:200000000")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,fma,tune=native")

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

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

#ifdef SINA
#define dbg(...) __f(#__VA_ARGS__, __VA_ARGS__)
template <typename Arg1> void __f(const char* name, Arg1&& arg1) { cout << name << " : " << arg1 << std::endl; }
template <typename Arg1, typename... Args> void __f (const char* names, Arg1&& arg1, Args&&... args) {
	const char* comma = strchr(names + 1, ',');cout.write(names, comma - names) << " : " << arg1<<" | ";__f(comma+1, args...); }
#define dbg2(x, j, n) cout<< #x << " : "; output((j), (n), x, 1); cout.flush();
#else
#define dbg(...) 0
#define dbg2(x, j, n) 0
#endif
#define SZ(x) ((ll)((x).size()))
#define File(s, t) freopen(s ".txt", "r", stdin); freopen(t ".txt", "w", stdout);
#define input(j, n, a) for (int _i = (j); _i < (n)+(j); _i++) cin>> a[_i];
#define output(j, n, a, t) for (int _i = (j); _i < (n)+(j); _i++) cout<< a[_i] << (((t) && _i != (n)+(j)-1)? ' ' : '\n');
#define kill(x) return cout<< (x) << endl, 0
#define cl const ll
#define fr first
#define sc second
#define lc (v << 1)
#define rc (lc | 1)
#define mid ((l + r) >> 1)
#define All(x) (x).begin(), (x).end()

cl inf = sizeof(ll) == 4 ? (1e9 + 10) : (3e18), mod = 1e9 + 7, MOD = 998244353;

template <class A,class B> ostream& operator << (ostream& out,const pair<A,B>&a){return out<<'('<<a.first<<", "<<a.second<<')';}
template <class A> ostream& operator << (ostream& out, const vector<A> &a) {
	out<< '['; for (int i = -1; ++i < int(a.size());) out<< a[i] << (i + 1 < int(a.size()) ? ", " : ""); return out<<']'; }
template <class T, typename _t = less <T> > using Tree = tree <T, null_type, _t, rb_tree_tag, tree_order_statistics_node_update>;

pll operator + (const pll &x, const pll &y) { return pll(x.fr + y.fr, x.sc + y.sc); }

cl N = 1e5 + 7;

struct segtree {
	ll l, r, sum, sum2;
	segtree *lt, *rt;
	inline segtree (cl &L = 1, cl &R = 0) : l(L), r(R), sum(0), sum2(0) {}

	void build () {
		if (l == r) return;
		lt = new segtree (l, mid);
		rt = new segtree (mid + 1, r);
		lt->build();
		rt->build();
	}

	void upd (cl &pos, cl &x, cl &y) {
		if (l == r) {
			sum = x;
			sum2 = y;
			return;
		}
		if (pos <= lt->r) lt->upd(pos, x, y);
		else rt->upd(pos, x, y);
		sum = lt->sum + rt->sum;
		sum2 = lt->sum2 + rt->sum2;
	}

	pll ask (cl &ql, cl &qr) {
		if (r < ql || qr < l) return pll(0, 0);
		if (ql <= l && r <= qr) return pll(sum, sum2);
		return lt->ask(ql, qr) + rt->ask(ql, qr);
	}
} seg [N];

ll sz [N], bc [N], h [N], pos [N], head [N], par [N], dp [N], val [N], n, q;
vector <pair <pll, ll>> path [N];
vector <ll> adj [N];

ll DFS (cl &v = 1, cl &pr = 0) {
	par[v] = pr; h[v] = h[pr] + 1;
	for (auto &u : adj[v]) if (u != pr) sz[v] += DFS(u, v), bc[v] = (sz[u] > sz[bc[v]] ? u : bc[v]);
	return ++sz[v];
}

void HLD (cl &v = 1, cl &hd = 1) {
	head[v] = hd; pos[v] = h[v] - h[head[v]] + 1;
	if (bc[v]) HLD(bc[v], hd);
	for (auto &u : adj[v]) if (u != par[v] && u != bc[v]) HLD(u, u);
}

ll LCA (ll v, ll u) {
	while (head[v] != head[u]) {
		if (h[par[head[v]]] < h[par[head[u]]]) u = par[head[u]];
		else v = par[head[v]];
	}
	return (h[v] < h[u] ? v : u);
}

ll ask (ll v, ll u, ll lca) {
	pll ret = {0, 0};
	for (; head[v] != head[lca]; v = par[head[v]]) ret = ret + seg[head[v]].ask(1, pos[v]);
	ret = ret + seg[head[v]].ask(pos[lca] + 1, pos[v]);
	for (; head[u] != head[lca]; u = par[head[u]]) ret = ret + seg[head[u]].ask(1, pos[u]);
	ret = ret + seg[head[u]].ask(pos[lca] + 1, pos[u]);
	ret.fr += val[lca];
	return ret.fr - ret.sc;
}

void dfs (cl &v = 1) {
	for (auto &u : adj[v]) if (u != par[v]) dfs(u);
	dp[v] = val[v];
	for (auto &x : path[v]) dp[v] = max(dp[v], ask(x.fr.fr, x.fr.sc, v) + x.sc);
	seg[head[v]].upd(pos[v], val[v], dp[v]);
	val[par[v]] += dp[v];
}

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

	cin>> n;
	for (ll i = 1, v, u; i < n; i++) {
		cin>> v >> u;
		adj[v].push_back(u); adj[u].push_back(v);
	}

	DFS(); HLD();
	for (ll v = 1; v <= n; v++) seg[head[v]].r++;
	for (ll i = 1; i <= n; i++) if (seg[i].r) seg[i].build();

	cin>> q;
	for (ll i = 0, v, u, c; i < q; i++) {
		cin>> v >> u >> c;
		path[LCA(v, u)].push_back({{v, u}, c});
	}

	dfs();
	cout<< *max_element(dp, dp + N) << endl;

	cerr<< "\nTime elapsed: " << 1000 * clock() / CLOCKS_PER_SEC << "ms\n";

	return 0;
}
/*
5
1 2
1 3
2 4
2 5
2
4 5 3
3 2 4

7
3 4
6 5
2 7
1 5
7 5
4 5
5
4 3 10
5 6 5
2 6 9
7 2 2
1 3 8

8
1 2
2 3
3 4
4 5
5 6
6 7
7 8
5
7 5 4
5 8 9
4 3 9
1 3 3
2 8 11

10
10 6
2 7
1 9
9 8
3 8
6 4
7 8
5 4
4 8
7
1 3 1
4 10 1
2 8 1
5 3 1
3 7 1
8 5 1
1 9 1

20
17 10
11 4
8 3
3 16
1 14
15 18
5 4
6 18
10 18
19 4
16 7
2 13
4 12
12 20
9 20
18 13
20 14
14 7
13 7
15
19 9 2341
13 8 6974
8 3 3339
15 17 6515
10 13 4370
1 7 8376
18 2 9272
6 7 4595
1 20 505
10 9 308
6 19 8937
2 15 5072
5 4 4217
2 4 4170
19 12 8204

*/

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8172 KB Output is correct
2 Correct 6 ms 8172 KB Output is correct
3 Correct 6 ms 8172 KB Output is correct
4 Correct 7 ms 8300 KB Output is correct
5 Correct 100 ms 20588 KB Output is correct
6 Correct 81 ms 42348 KB Output is correct
7 Correct 96 ms 34028 KB Output is correct
8 Correct 60 ms 15468 KB Output is correct
9 Correct 98 ms 30464 KB Output is correct
10 Correct 62 ms 15440 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8172 KB Output is correct
2 Correct 7 ms 8172 KB Output is correct
3 Correct 7 ms 8556 KB Output is correct
4 Correct 179 ms 45548 KB Output is correct
5 Correct 192 ms 45528 KB Output is correct
6 Correct 153 ms 45676 KB Output is correct
7 Correct 175 ms 45568 KB Output is correct
8 Correct 176 ms 45548 KB Output is correct
9 Correct 158 ms 45568 KB Output is correct
10 Correct 180 ms 45548 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8172 KB Output is correct
2 Correct 7 ms 8172 KB Output is correct
3 Correct 7 ms 8556 KB Output is correct
4 Correct 179 ms 45548 KB Output is correct
5 Correct 192 ms 45528 KB Output is correct
6 Correct 153 ms 45676 KB Output is correct
7 Correct 175 ms 45568 KB Output is correct
8 Correct 176 ms 45548 KB Output is correct
9 Correct 158 ms 45568 KB Output is correct
10 Correct 180 ms 45548 KB Output is correct
11 Correct 19 ms 9324 KB Output is correct
12 Correct 178 ms 45932 KB Output is correct
13 Correct 179 ms 45804 KB Output is correct
14 Correct 161 ms 45932 KB Output is correct
15 Correct 188 ms 45804 KB Output is correct
16 Correct 158 ms 45896 KB Output is correct
17 Correct 174 ms 45804 KB Output is correct
18 Correct 171 ms 45804 KB Output is correct
19 Correct 157 ms 45824 KB Output is correct
20 Correct 173 ms 45804 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 212 ms 23288 KB Output is correct
2 Correct 154 ms 45560 KB Output is correct
3 Correct 249 ms 36716 KB Output is correct
4 Correct 107 ms 18340 KB Output is correct
5 Correct 196 ms 35436 KB Output is correct
6 Correct 113 ms 18272 KB Output is correct
7 Correct 226 ms 34984 KB Output is correct
8 Correct 181 ms 23532 KB Output is correct
9 Correct 153 ms 45548 KB Output is correct
10 Correct 247 ms 33060 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8172 KB Output is correct
2 Correct 6 ms 8172 KB Output is correct
3 Correct 6 ms 8172 KB Output is correct
4 Correct 7 ms 8300 KB Output is correct
5 Correct 100 ms 20588 KB Output is correct
6 Correct 81 ms 42348 KB Output is correct
7 Correct 96 ms 34028 KB Output is correct
8 Correct 60 ms 15468 KB Output is correct
9 Correct 98 ms 30464 KB Output is correct
10 Correct 62 ms 15440 KB Output is correct
11 Correct 8 ms 8300 KB Output is correct
12 Correct 8 ms 8556 KB Output is correct
13 Correct 8 ms 8428 KB Output is correct
14 Correct 7 ms 8300 KB Output is correct
15 Correct 8 ms 8300 KB Output is correct
16 Correct 7 ms 8428 KB Output is correct
17 Correct 7 ms 8300 KB Output is correct
18 Correct 7 ms 8556 KB Output is correct
19 Correct 7 ms 8300 KB Output is correct
20 Correct 8 ms 8556 KB Output is correct

Subtask #6
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8172 KB Output is correct
2 Correct 6 ms 8172 KB Output is correct
3 Correct 6 ms 8172 KB Output is correct
4 Correct 7 ms 8300 KB Output is correct
5 Correct 100 ms 20588 KB Output is correct
6 Correct 81 ms 42348 KB Output is correct
7 Correct 96 ms 34028 KB Output is correct
8 Correct 60 ms 15468 KB Output is correct
9 Correct 98 ms 30464 KB Output is correct
10 Correct 62 ms 15440 KB Output is correct
11 Correct 6 ms 8172 KB Output is correct
12 Correct 7 ms 8172 KB Output is correct
13 Correct 7 ms 8556 KB Output is correct
14 Correct 179 ms 45548 KB Output is correct
15 Correct 192 ms 45528 KB Output is correct
16 Correct 153 ms 45676 KB Output is correct
17 Correct 175 ms 45568 KB Output is correct
18 Correct 176 ms 45548 KB Output is correct
19 Correct 158 ms 45568 KB Output is correct
20 Correct 180 ms 45548 KB Output is correct
21 Correct 19 ms 9324 KB Output is correct
22 Correct 178 ms 45932 KB Output is correct
23 Correct 179 ms 45804 KB Output is correct
24 Correct 161 ms 45932 KB Output is correct
25 Correct 188 ms 45804 KB Output is correct
26 Correct 158 ms 45896 KB Output is correct
27 Correct 174 ms 45804 KB Output is correct
28 Correct 171 ms 45804 KB Output is correct
29 Correct 157 ms 45824 KB Output is correct
30 Correct 173 ms 45804 KB Output is correct
31 Correct 212 ms 23288 KB Output is correct
32 Correct 154 ms 45560 KB Output is correct
33 Correct 249 ms 36716 KB Output is correct
34 Correct 107 ms 18340 KB Output is correct
35 Correct 196 ms 35436 KB Output is correct
36 Correct 113 ms 18272 KB Output is correct
37 Correct 226 ms 34984 KB Output is correct
38 Correct 181 ms 23532 KB Output is correct
39 Correct 153 ms 45548 KB Output is correct
40 Correct 247 ms 33060 KB Output is correct
41 Correct 8 ms 8300 KB Output is correct
42 Correct 8 ms 8556 KB Output is correct
43 Correct 8 ms 8428 KB Output is correct
44 Correct 7 ms 8300 KB Output is correct
45 Correct 8 ms 8300 KB Output is correct
46 Correct 7 ms 8428 KB Output is correct
47 Correct 7 ms 8300 KB Output is correct
48 Correct 7 ms 8556 KB Output is correct
49 Correct 7 ms 8300 KB Output is correct
50 Correct 8 ms 8556 KB Output is correct
51 Correct 180 ms 23916 KB Output is correct
52 Correct 176 ms 45932 KB Output is correct
53 Correct 255 ms 33704 KB Output is correct
54 Correct 110 ms 18600 KB Output is correct
55 Correct 227 ms 23716 KB Output is correct
56 Correct 174 ms 45804 KB Output is correct
57 Correct 191 ms 34668 KB Output is correct
58 Correct 114 ms 18468 KB Output is correct
59 Correct 177 ms 24044 KB Output is correct
60 Correct 194 ms 45932 KB Output is correct
61 Correct 205 ms 35052 KB Output is correct
62 Correct 108 ms 18248 KB Output is correct
63 Correct 211 ms 23384 KB Output is correct
64 Correct 175 ms 45804 KB Output is correct
65 Correct 233 ms 34852 KB Output is correct
66 Correct 106 ms 18600 KB Output is correct
67 Correct 216 ms 23520 KB Output is correct
68 Correct 176 ms 45828 KB Output is correct
69 Correct 203 ms 32364 KB Output is correct
70 Correct 113 ms 18640 KB Output is correct