oj.uz

Submission #342578

# Submission time Handle Problem Language Result Execution time Memory
342578 2021-01-02T11:49:02 Z maskoff Election Campaign (JOI15_election_campaign) C++14
100 / 100
 303 ms 46316 KB 
#include <bits/stdc++.h>
          
#define fi first
#define se second
#define pp pop_back
#define ll long long
#define pb push_back
#define ld long double
#define debug cout << "OK\n";
#define all(x) x.begin(), x.end() 
#define mp make_pair 
using namespace std;        
 
const ll N = 3e5 + 200;
const ll mod = 1e9 + 7;
const ll mod2 = 998244353;
const ll pe = mod2; 
const ll pe2 = 570210983;
const ld eps = 1e-6; 
 
 
/*
Rucode: jaqVYNrpMj
JUDGE_ID: 295965SY
dl:160532
*/
void data() {
} 

int n, m, timer;
int tin[N], tout[N], up[25][N];
ll dp[N], dp2[N], l[N], r[N], w[N];
vector<int> g[N], g2[N];
struct fenw
{
	ll f[N * 2];
	void upd(int pos, ll val)
	{
		for (int i = pos; i <= N; i = (i | (i + 1)))
			f[i] += val;
	}
	ll sum(int pos)
	{
		ll res = 0;
		for (int i = pos; i >= 1; i = (i & (i + 1)) - 1)
			res += f[i];
		return res;
	}
	ll get(int l, int r)
	{
		if (l > r)
			return 0;
		return sum(r) - sum(l - 1);
	}
} tr, tr2;
void dfs(int v, int p)
{
	tin[v] = ++timer;
	up[0][v] = max(p, 1);
	for (int i = 1; i <= 18; i++)
	{
		up[i][v] = up[i - 1][up[i - 1][v]];
	}
	for (int i = 0; i < g[v].size(); i++)
	{
		int to = g[v][i];
		if (to == p)
			continue;
		dfs(to, v);
	}
	tout[v] = ++timer;
}
bool upper(int a, int b)
{
	return (tin[a] <= tin[b] && tout[b] <= tout[a]);
}
int lca(int a, int b)
{
	if (upper(a, b))
		return a;
	if (upper(b, a))
		return b;
	for (int i = 18; i >= 0; i--)
	{
		if (!upper(up[i][a], b))
			a = up[i][a];
	}
	return up[0][a];
}    
void dfs2(int v, int p)
{
	for (int i = 0; i < g[v].size(); i++)
	{
		int to = g[v][i];
		if (to == p)
			continue;
		dfs2(to, v);
	   	dp[v] += dp2[to];
	}
	dp2[v] = dp[v];
	for (int i = 0; i < g2[v].size(); i++)
	{
		int pos = g2[v][i];
		int a = l[pos], b = r[pos];
		dp2[v] = max(dp2[v] , dp[v] + tr.get(tin[v], tin[a]) + tr.get(tin[v], tin[b]) 
					 				- tr2.get(tin[v], tin[a]) - tr2.get(tin[v], tin[b]) + w[pos]); 
	}
	tr.upd(tin[v], dp[v]);
	tr.upd(tout[v], -dp[v]);
	tr2.upd(tin[v], dp2[v]);
	tr2.upd(tout[v], -dp2[v]);
}
main()
{
	data();
	ios_base::sync_with_stdio(0),
	cin.tie(0),cout.tie(0);
	cin >> n;
	for (int i = 1; i < n; i++)
	{
		int u, v;
		cin >> u >> v;
		g[u].pb(v), g[v].pb(u);
	}
	dfs(1, 0);
	cin >> m;
	for (int i = 1; i <= m; i++)
	{
		cin >> l[i] >> r[i] >> w[i];
		int lc = lca(l[i], r[i]);
		g2[lc].pb(i);
	}
	dfs2(1, 0);
	cout << dp2[1];
}

Compilation message

election_campaign.cpp: In function 'void dfs(int, int)':
election_campaign.cpp:64:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   64 |  for (int i = 0; i < g[v].size(); i++)
      |                  ~~^~~~~~~~~~~~~
election_campaign.cpp: In function 'void dfs2(int, int)':
election_campaign.cpp:92:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   92 |  for (int i = 0; i < g[v].size(); i++)
      |                  ~~^~~~~~~~~~~~~
election_campaign.cpp:101:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  101 |  for (int i = 0; i < g2[v].size(); i++)
      |                  ~~^~~~~~~~~~~~~~
election_campaign.cpp: At global scope:
election_campaign.cpp:113:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  113 | main()
      |      ^

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 14700 KB Output is correct
2 Correct 10 ms 14700 KB Output is correct
3 Correct 10 ms 14700 KB Output is correct
4 Correct 11 ms 14956 KB Output is correct
5 Correct 149 ms 30956 KB Output is correct
6 Correct 66 ms 41196 KB Output is correct
7 Correct 155 ms 37996 KB Output is correct
8 Correct 105 ms 31596 KB Output is correct
9 Correct 146 ms 36224 KB Output is correct
10 Correct 109 ms 31616 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 14828 KB Output is correct
2 Correct 10 ms 14700 KB Output is correct
3 Correct 12 ms 14956 KB Output is correct
4 Correct 140 ms 43500 KB Output is correct
5 Correct 122 ms 43500 KB Output is correct
6 Correct 124 ms 43628 KB Output is correct
7 Correct 123 ms 43500 KB Output is correct
8 Correct 124 ms 43628 KB Output is correct
9 Correct 128 ms 43560 KB Output is correct
10 Correct 133 ms 43500 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 14828 KB Output is correct
2 Correct 10 ms 14700 KB Output is correct
3 Correct 12 ms 14956 KB Output is correct
4 Correct 140 ms 43500 KB Output is correct
5 Correct 122 ms 43500 KB Output is correct
6 Correct 124 ms 43628 KB Output is correct
7 Correct 123 ms 43500 KB Output is correct
8 Correct 124 ms 43628 KB Output is correct
9 Correct 128 ms 43560 KB Output is correct
10 Correct 133 ms 43500 KB Output is correct
11 Correct 19 ms 15724 KB Output is correct
12 Correct 129 ms 43500 KB Output is correct
13 Correct 138 ms 43488 KB Output is correct
14 Correct 131 ms 43628 KB Output is correct
15 Correct 125 ms 43628 KB Output is correct
16 Correct 123 ms 43500 KB Output is correct
17 Correct 135 ms 43500 KB Output is correct
18 Correct 128 ms 43500 KB Output is correct
19 Correct 125 ms 43500 KB Output is correct
20 Correct 127 ms 43500 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 265 ms 33768 KB Output is correct
2 Correct 124 ms 46060 KB Output is correct
3 Correct 297 ms 42348 KB Output is correct
4 Correct 204 ms 35816 KB Output is correct
5 Correct 248 ms 41836 KB Output is correct
6 Correct 268 ms 36072 KB Output is correct
7 Correct 290 ms 41644 KB Output is correct
8 Correct 243 ms 36588 KB Output is correct
9 Correct 121 ms 46080 KB Output is correct
10 Correct 299 ms 40568 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 14700 KB Output is correct
2 Correct 10 ms 14700 KB Output is correct
3 Correct 10 ms 14700 KB Output is correct
4 Correct 11 ms 14956 KB Output is correct
5 Correct 149 ms 30956 KB Output is correct
6 Correct 66 ms 41196 KB Output is correct
7 Correct 155 ms 37996 KB Output is correct
8 Correct 105 ms 31596 KB Output is correct
9 Correct 146 ms 36224 KB Output is correct
10 Correct 109 ms 31616 KB Output is correct
11 Correct 11 ms 14956 KB Output is correct
12 Correct 11 ms 14956 KB Output is correct
13 Correct 10 ms 14956 KB Output is correct
14 Correct 11 ms 14956 KB Output is correct
15 Correct 11 ms 14956 KB Output is correct
16 Correct 11 ms 14956 KB Output is correct
17 Correct 11 ms 14956 KB Output is correct
18 Correct 13 ms 14956 KB Output is correct
19 Correct 11 ms 14956 KB Output is correct
20 Correct 11 ms 14956 KB Output is correct

Subtask #6
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 14700 KB Output is correct
2 Correct 10 ms 14700 KB Output is correct
3 Correct 10 ms 14700 KB Output is correct
4 Correct 11 ms 14956 KB Output is correct
5 Correct 149 ms 30956 KB Output is correct
6 Correct 66 ms 41196 KB Output is correct
7 Correct 155 ms 37996 KB Output is correct
8 Correct 105 ms 31596 KB Output is correct
9 Correct 146 ms 36224 KB Output is correct
10 Correct 109 ms 31616 KB Output is correct
11 Correct 12 ms 14828 KB Output is correct
12 Correct 10 ms 14700 KB Output is correct
13 Correct 12 ms 14956 KB Output is correct
14 Correct 140 ms 43500 KB Output is correct
15 Correct 122 ms 43500 KB Output is correct
16 Correct 124 ms 43628 KB Output is correct
17 Correct 123 ms 43500 KB Output is correct
18 Correct 124 ms 43628 KB Output is correct
19 Correct 128 ms 43560 KB Output is correct
20 Correct 133 ms 43500 KB Output is correct
21 Correct 19 ms 15724 KB Output is correct
22 Correct 129 ms 43500 KB Output is correct
23 Correct 138 ms 43488 KB Output is correct
24 Correct 131 ms 43628 KB Output is correct
25 Correct 125 ms 43628 KB Output is correct
26 Correct 123 ms 43500 KB Output is correct
27 Correct 135 ms 43500 KB Output is correct
28 Correct 128 ms 43500 KB Output is correct
29 Correct 125 ms 43500 KB Output is correct
30 Correct 127 ms 43500 KB Output is correct
31 Correct 265 ms 33768 KB Output is correct
32 Correct 124 ms 46060 KB Output is correct
33 Correct 297 ms 42348 KB Output is correct
34 Correct 204 ms 35816 KB Output is correct
35 Correct 248 ms 41836 KB Output is correct
36 Correct 268 ms 36072 KB Output is correct
37 Correct 290 ms 41644 KB Output is correct
38 Correct 243 ms 36588 KB Output is correct
39 Correct 121 ms 46080 KB Output is correct
40 Correct 299 ms 40568 KB Output is correct
41 Correct 11 ms 14956 KB Output is correct
42 Correct 11 ms 14956 KB Output is correct
43 Correct 10 ms 14956 KB Output is correct
44 Correct 11 ms 14956 KB Output is correct
45 Correct 11 ms 14956 KB Output is correct
46 Correct 11 ms 14956 KB Output is correct
47 Correct 11 ms 14956 KB Output is correct
48 Correct 13 ms 14956 KB Output is correct
49 Correct 11 ms 14956 KB Output is correct
50 Correct 11 ms 14956 KB Output is correct
51 Correct 257 ms 36984 KB Output is correct
52 Correct 129 ms 46316 KB Output is correct
53 Correct 295 ms 40808 KB Output is correct
54 Correct 173 ms 36076 KB Output is correct
55 Correct 257 ms 36456 KB Output is correct
56 Correct 131 ms 46316 KB Output is correct
57 Correct 265 ms 41612 KB Output is correct
58 Correct 216 ms 36076 KB Output is correct
59 Correct 279 ms 36972 KB Output is correct
60 Correct 128 ms 46316 KB Output is correct
61 Correct 259 ms 41804 KB Output is correct
62 Correct 217 ms 36276 KB Output is correct
63 Correct 246 ms 36484 KB Output is correct
64 Correct 127 ms 46316 KB Output is correct
65 Correct 303 ms 41576 KB Output is correct
66 Correct 214 ms 36204 KB Output is correct
67 Correct 261 ms 36656 KB Output is correct
68 Correct 127 ms 46316 KB Output is correct
69 Correct 244 ms 40304 KB Output is correct
70 Correct 208 ms 36332 KB Output is correct