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답안 #536811

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
536811 2022-03-14T05:12:31 Z pavement Election Campaign (JOI15_election_campaign) C++17
100 / 100
 304 ms 46228 KB 
#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;
#ifdef _WIN32
#define getchar_unlocked _getchar_nolock
#endif
#define int long long
#define mp make_pair
#define mt make_tuple
#define pb push_back
#define ppb pop_back
#define eb emplace_back
#define g0(a) get<0>(a)
#define g1(a) get<1>(a)
#define g2(a) get<2>(a)
#define g3(a) get<3>(a)
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
typedef double db;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> ii;
typedef tuple<int, int, int> iii;
typedef tuple<int, int, int, int> iiii;
typedef tree<ii, null_type, less<ii>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;

int N, M, idx, a[100005], b[100005], c[100005], sz[100005], pre[100005], ft1[100005], ft2[100005], anc[100005][25], dep[100005];
vector<int> adj[100005], vec[100005];

int dfs(int n, int e = -1) {
	anc[n][0] = e;
	pre[n] = ++idx;
	for (int i = 1; i <= 20; i++)
		if (anc[n][i - 1] != -1)
			anc[n][i] = anc[anc[n][i - 1]][i - 1];
	for (auto u : adj[n])
		if (u != e) {
			dep[u] = dep[n] + 1;
			sz[n] += dfs(u, n);
		}
	return ++sz[n];
}

int lca(int u, int v) {
	if (dep[u] < dep[v]) swap(u, v);
	for (int i = 20; i >= 0; i--)
		if (dep[u] - (1 << i) >= dep[v]) u = anc[u][i];
	if (u == v) return u;
	for (int i = 20; i >= 0; i--)
		if (anc[u][i] != anc[v][i]) {
			u = anc[u][i];
			v = anc[v][i];
		}
	return anc[u][0];
}

inline int ls(int x) { return x & -x; }

void upd1(int l, int r, int v) {
	for (; l <= N; l += ls(l)) ft1[l] += v;
	for (r++; r <= N; r += ls(r)) ft1[r] -= v;
}

void upd2(int l, int r, int v) {
	for (; l <= N; l += ls(l)) ft2[l] += v;
	for (r++; r <= N; r += ls(r)) ft2[r] -= v;
}

int qry1(int p) {
	p = pre[p];
	int r = 0;
	for (; p; p -= ls(p)) r += ft1[p];
	return r;
}

int qry2(int p) {
	p = pre[p];
	int r = 0;
	for (; p; p -= ls(p)) r += ft2[p];
	return r;
}

int dp(int n, int e = -1) {
	int ret = 0;
	for (auto u : adj[n])
		if (u != e) ret += dp(u, n);
	upd1(pre[n], pre[n] + sz[n] - 1, ret);
	for (auto i : vec[n])
		ret = max(ret, qry1(a[i]) + qry1(b[i]) - qry1(n) - (qry2(a[i]) + qry2(b[i]) - qry2(n)) + c[i]);
	upd2(pre[n], pre[n] + sz[n] - 1, ret);
	return ret;
}

main() {
	memset(anc, -1, sizeof anc);
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin >> N;
	for (int i = 1, u, v; i < N; i++) {
		cin >> u >> v;
		adj[u].pb(v);
		adj[v].pb(u);
	}
	dfs(1);
	cin >> M;
	for (int i = 1; i <= M; i++) {
		cin >> a[i] >> b[i] >> c[i];
		vec[lca(a[i], b[i])].pb(i);
	}
	cout << dp(1) << '\n';
}

Compilation message

election_campaign.cpp:95:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   95 | main() {
      | ^~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 24532 KB Output is correct
2 Correct 11 ms 24532 KB Output is correct
3 Correct 12 ms 24532 KB Output is correct
4 Correct 13 ms 24616 KB Output is correct
5 Correct 119 ms 33560 KB Output is correct
6 Correct 60 ms 40564 KB Output is correct
7 Correct 104 ms 38272 KB Output is correct
8 Correct 82 ms 33668 KB Output is correct
9 Correct 135 ms 36716 KB Output is correct
10 Correct 78 ms 33692 KB Output is correct

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 24612 KB Output is correct
2 Correct 12 ms 24640 KB Output is correct
3 Correct 12 ms 24748 KB Output is correct
4 Correct 173 ms 45836 KB Output is correct
5 Correct 173 ms 45828 KB Output is correct
6 Correct 132 ms 45892 KB Output is correct
7 Correct 185 ms 45836 KB Output is correct
8 Correct 175 ms 45716 KB Output is correct
9 Correct 125 ms 46028 KB Output is correct
10 Correct 150 ms 45840 KB Output is correct

Subtask #3
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 24612 KB Output is correct
2 Correct 12 ms 24640 KB Output is correct
3 Correct 12 ms 24748 KB Output is correct
4 Correct 173 ms 45836 KB Output is correct
5 Correct 173 ms 45828 KB Output is correct
6 Correct 132 ms 45892 KB Output is correct
7 Correct 185 ms 45836 KB Output is correct
8 Correct 175 ms 45716 KB Output is correct
9 Correct 125 ms 46028 KB Output is correct
10 Correct 150 ms 45840 KB Output is correct
11 Correct 22 ms 25900 KB Output is correct
12 Correct 177 ms 46076 KB Output is correct
13 Correct 187 ms 46120 KB Output is correct
14 Correct 153 ms 46080 KB Output is correct
15 Correct 168 ms 46116 KB Output is correct
16 Correct 130 ms 46168 KB Output is correct
17 Correct 205 ms 46108 KB Output is correct
18 Correct 149 ms 46056 KB Output is correct
19 Correct 145 ms 46112 KB Output is correct
20 Correct 199 ms 46228 KB Output is correct

Subtask #4
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 175 ms 38188 KB Output is correct
2 Correct 141 ms 45872 KB Output is correct
3 Correct 300 ms 43192 KB Output is correct
4 Correct 135 ms 38372 KB Output is correct
5 Correct 254 ms 42664 KB Output is correct
6 Correct 128 ms 38304 KB Output is correct
7 Correct 304 ms 42580 KB Output is correct
8 Correct 211 ms 38460 KB Output is correct
9 Correct 149 ms 45892 KB Output is correct
10 Correct 257 ms 41484 KB Output is correct

Subtask #5
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 24532 KB Output is correct
2 Correct 11 ms 24532 KB Output is correct
3 Correct 12 ms 24532 KB Output is correct
4 Correct 13 ms 24616 KB Output is correct
5 Correct 119 ms 33560 KB Output is correct
6 Correct 60 ms 40564 KB Output is correct
7 Correct 104 ms 38272 KB Output is correct
8 Correct 82 ms 33668 KB Output is correct
9 Correct 135 ms 36716 KB Output is correct
10 Correct 78 ms 33692 KB Output is correct
11 Correct 12 ms 24660 KB Output is correct
12 Correct 13 ms 24740 KB Output is correct
13 Correct 13 ms 24756 KB Output is correct
14 Correct 13 ms 24756 KB Output is correct
15 Correct 13 ms 24712 KB Output is correct
16 Correct 12 ms 24752 KB Output is correct
17 Correct 13 ms 24648 KB Output is correct
18 Correct 12 ms 24788 KB Output is correct
19 Correct 12 ms 24660 KB Output is correct
20 Correct 13 ms 24772 KB Output is correct

Subtask #6
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 24532 KB Output is correct
2 Correct 11 ms 24532 KB Output is correct
3 Correct 12 ms 24532 KB Output is correct
4 Correct 13 ms 24616 KB Output is correct
5 Correct 119 ms 33560 KB Output is correct
6 Correct 60 ms 40564 KB Output is correct
7 Correct 104 ms 38272 KB Output is correct
8 Correct 82 ms 33668 KB Output is correct
9 Correct 135 ms 36716 KB Output is correct
10 Correct 78 ms 33692 KB Output is correct
11 Correct 11 ms 24612 KB Output is correct
12 Correct 12 ms 24640 KB Output is correct
13 Correct 12 ms 24748 KB Output is correct
14 Correct 173 ms 45836 KB Output is correct
15 Correct 173 ms 45828 KB Output is correct
16 Correct 132 ms 45892 KB Output is correct
17 Correct 185 ms 45836 KB Output is correct
18 Correct 175 ms 45716 KB Output is correct
19 Correct 125 ms 46028 KB Output is correct
20 Correct 150 ms 45840 KB Output is correct
21 Correct 22 ms 25900 KB Output is correct
22 Correct 177 ms 46076 KB Output is correct
23 Correct 187 ms 46120 KB Output is correct
24 Correct 153 ms 46080 KB Output is correct
25 Correct 168 ms 46116 KB Output is correct
26 Correct 130 ms 46168 KB Output is correct
27 Correct 205 ms 46108 KB Output is correct
28 Correct 149 ms 46056 KB Output is correct
29 Correct 145 ms 46112 KB Output is correct
30 Correct 199 ms 46228 KB Output is correct
31 Correct 175 ms 38188 KB Output is correct
32 Correct 141 ms 45872 KB Output is correct
33 Correct 300 ms 43192 KB Output is correct
34 Correct 135 ms 38372 KB Output is correct
35 Correct 254 ms 42664 KB Output is correct
36 Correct 128 ms 38304 KB Output is correct
37 Correct 304 ms 42580 KB Output is correct
38 Correct 211 ms 38460 KB Output is correct
39 Correct 149 ms 45892 KB Output is correct
40 Correct 257 ms 41484 KB Output is correct
41 Correct 12 ms 24660 KB Output is correct
42 Correct 13 ms 24740 KB Output is correct
43 Correct 13 ms 24756 KB Output is correct
44 Correct 13 ms 24756 KB Output is correct
45 Correct 13 ms 24712 KB Output is correct
46 Correct 12 ms 24752 KB Output is correct
47 Correct 13 ms 24648 KB Output is correct
48 Correct 12 ms 24788 KB Output is correct
49 Correct 12 ms 24660 KB Output is correct
50 Correct 13 ms 24772 KB Output is correct
51 Correct 223 ms 38708 KB Output is correct
52 Correct 181 ms 46132 KB Output is correct
53 Correct 301 ms 42016 KB Output is correct
54 Correct 136 ms 38584 KB Output is correct
55 Correct 191 ms 38480 KB Output is correct
56 Correct 155 ms 46020 KB Output is correct
57 Correct 232 ms 42508 KB Output is correct
58 Correct 158 ms 38524 KB Output is correct
59 Correct 212 ms 38656 KB Output is correct
60 Correct 182 ms 46048 KB Output is correct
61 Correct 278 ms 42572 KB Output is correct
62 Correct 137 ms 38500 KB Output is correct
63 Correct 204 ms 38412 KB Output is correct
64 Correct 198 ms 46060 KB Output is correct
65 Correct 266 ms 42368 KB Output is correct
66 Correct 161 ms 38688 KB Output is correct
67 Correct 175 ms 38356 KB Output is correct
68 Correct 176 ms 46004 KB Output is correct
69 Correct 229 ms 41420 KB Output is correct
70 Correct 138 ms 38740 KB Output is correct