oj.uz

Submission #342579

# Submission time Handle Problem Language Result Execution time Memory
342579 2021-01-02T11:49:46 Z maskoff Election Campaign (JOI15_election_campaign) C++14
100 / 100
 375 ms 76652 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 = 1e6 + 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 30 ms 47596 KB Output is correct
2 Correct 30 ms 47596 KB Output is correct
3 Correct 31 ms 47596 KB Output is correct
4 Correct 30 ms 47724 KB Output is correct
5 Correct 166 ms 63852 KB Output is correct
6 Correct 85 ms 73068 KB Output is correct
7 Correct 184 ms 69864 KB Output is correct
8 Correct 141 ms 63468 KB Output is correct
9 Correct 170 ms 68076 KB Output is correct
10 Correct 130 ms 63468 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 47596 KB Output is correct
2 Correct 30 ms 47596 KB Output is correct
3 Correct 33 ms 47852 KB Output is correct
4 Correct 158 ms 76552 KB Output is correct
5 Correct 155 ms 76524 KB Output is correct
6 Correct 159 ms 76472 KB Output is correct
7 Correct 173 ms 76396 KB Output is correct
8 Correct 152 ms 76464 KB Output is correct
9 Correct 144 ms 76652 KB Output is correct
10 Correct 145 ms 76396 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 47596 KB Output is correct
2 Correct 30 ms 47596 KB Output is correct
3 Correct 33 ms 47852 KB Output is correct
4 Correct 158 ms 76552 KB Output is correct
5 Correct 155 ms 76524 KB Output is correct
6 Correct 159 ms 76472 KB Output is correct
7 Correct 173 ms 76396 KB Output is correct
8 Correct 152 ms 76464 KB Output is correct
9 Correct 144 ms 76652 KB Output is correct
10 Correct 145 ms 76396 KB Output is correct
11 Correct 39 ms 48620 KB Output is correct
12 Correct 157 ms 76524 KB Output is correct
13 Correct 154 ms 76396 KB Output is correct
14 Correct 152 ms 76524 KB Output is correct
15 Correct 155 ms 76396 KB Output is correct
16 Correct 150 ms 76524 KB Output is correct
17 Correct 153 ms 76520 KB Output is correct
18 Correct 154 ms 76396 KB Output is correct
19 Correct 149 ms 76512 KB Output is correct
20 Correct 151 ms 76408 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 292 ms 66792 KB Output is correct
2 Correct 158 ms 76500 KB Output is correct
3 Correct 332 ms 72848 KB Output is correct
4 Correct 229 ms 66280 KB Output is correct
5 Correct 278 ms 72300 KB Output is correct
6 Correct 231 ms 66408 KB Output is correct
7 Correct 366 ms 71916 KB Output is correct
8 Correct 309 ms 67052 KB Output is correct
9 Correct 148 ms 76652 KB Output is correct
10 Correct 313 ms 70944 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 47596 KB Output is correct
2 Correct 30 ms 47596 KB Output is correct
3 Correct 31 ms 47596 KB Output is correct
4 Correct 30 ms 47724 KB Output is correct
5 Correct 166 ms 63852 KB Output is correct
6 Correct 85 ms 73068 KB Output is correct
7 Correct 184 ms 69864 KB Output is correct
8 Correct 141 ms 63468 KB Output is correct
9 Correct 170 ms 68076 KB Output is correct
10 Correct 130 ms 63468 KB Output is correct
11 Correct 32 ms 47852 KB Output is correct
12 Correct 33 ms 47852 KB Output is correct
13 Correct 33 ms 47852 KB Output is correct
14 Correct 34 ms 47796 KB Output is correct
15 Correct 32 ms 47852 KB Output is correct
16 Correct 31 ms 47852 KB Output is correct
17 Correct 32 ms 47852 KB Output is correct
18 Correct 32 ms 47852 KB Output is correct
19 Correct 32 ms 47852 KB Output is correct
20 Correct 31 ms 47852 KB Output is correct

Subtask #6
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 47596 KB Output is correct
2 Correct 30 ms 47596 KB Output is correct
3 Correct 31 ms 47596 KB Output is correct
4 Correct 30 ms 47724 KB Output is correct
5 Correct 166 ms 63852 KB Output is correct
6 Correct 85 ms 73068 KB Output is correct
7 Correct 184 ms 69864 KB Output is correct
8 Correct 141 ms 63468 KB Output is correct
9 Correct 170 ms 68076 KB Output is correct
10 Correct 130 ms 63468 KB Output is correct
11 Correct 30 ms 47596 KB Output is correct
12 Correct 30 ms 47596 KB Output is correct
13 Correct 33 ms 47852 KB Output is correct
14 Correct 158 ms 76552 KB Output is correct
15 Correct 155 ms 76524 KB Output is correct
16 Correct 159 ms 76472 KB Output is correct
17 Correct 173 ms 76396 KB Output is correct
18 Correct 152 ms 76464 KB Output is correct
19 Correct 144 ms 76652 KB Output is correct
20 Correct 145 ms 76396 KB Output is correct
21 Correct 39 ms 48620 KB Output is correct
22 Correct 157 ms 76524 KB Output is correct
23 Correct 154 ms 76396 KB Output is correct
24 Correct 152 ms 76524 KB Output is correct
25 Correct 155 ms 76396 KB Output is correct
26 Correct 150 ms 76524 KB Output is correct
27 Correct 153 ms 76520 KB Output is correct
28 Correct 154 ms 76396 KB Output is correct
29 Correct 149 ms 76512 KB Output is correct
30 Correct 151 ms 76408 KB Output is correct
31 Correct 292 ms 66792 KB Output is correct
32 Correct 158 ms 76500 KB Output is correct
33 Correct 332 ms 72848 KB Output is correct
34 Correct 229 ms 66280 KB Output is correct
35 Correct 278 ms 72300 KB Output is correct
36 Correct 231 ms 66408 KB Output is correct
37 Correct 366 ms 71916 KB Output is correct
38 Correct 309 ms 67052 KB Output is correct
39 Correct 148 ms 76652 KB Output is correct
40 Correct 313 ms 70944 KB Output is correct
41 Correct 32 ms 47852 KB Output is correct
42 Correct 33 ms 47852 KB Output is correct
43 Correct 33 ms 47852 KB Output is correct
44 Correct 34 ms 47796 KB Output is correct
45 Correct 32 ms 47852 KB Output is correct
46 Correct 31 ms 47852 KB Output is correct
47 Correct 32 ms 47852 KB Output is correct
48 Correct 32 ms 47852 KB Output is correct
49 Correct 32 ms 47852 KB Output is correct
50 Correct 31 ms 47852 KB Output is correct
51 Correct 287 ms 67120 KB Output is correct
52 Correct 161 ms 76524 KB Output is correct
53 Correct 357 ms 71016 KB Output is correct
54 Correct 216 ms 66200 KB Output is correct
55 Correct 291 ms 66664 KB Output is correct
56 Correct 170 ms 76524 KB Output is correct
57 Correct 300 ms 71788 KB Output is correct
58 Correct 286 ms 66312 KB Output is correct
59 Correct 283 ms 67052 KB Output is correct
60 Correct 152 ms 76396 KB Output is correct
61 Correct 303 ms 71904 KB Output is correct
62 Correct 255 ms 66348 KB Output is correct
63 Correct 281 ms 66688 KB Output is correct
64 Correct 155 ms 76396 KB Output is correct
65 Correct 355 ms 71752 KB Output is correct
66 Correct 237 ms 66312 KB Output is correct
67 Correct 269 ms 66792 KB Output is correct
68 Correct 161 ms 76524 KB Output is correct
69 Correct 375 ms 70380 KB Output is correct
70 Correct 258 ms 66408 KB Output is correct