oj.uz

Submission #960730

# Submission time Handle Problem Language Result Execution time Memory
960730 2024-04-11T01:32:00 Z pcc Election Campaign (JOI15_election_campaign) C++17
100 / 100
 98 ms 38976 KB 
#include <bits/stdc++.h>
using namespace std;
 
#define ll int
#define pll pair<ll,ll>
#define pii pair<int,int>
#define fs first
#define sc second
#define tlll tuple<ll,ll,ll>
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("popcnt,sse4,avx2")
 
const int mxn = 1e5+10;
int N,Q;
 
vector<int> tree[mxn];
vector<pair<pii,int>> req[mxn];
 
namespace HLD{
	int idx[mxn],link_top[mxn],par[mxn],dep[mxn],bs[mxn],sz[mxn];
	ll bit[mxn];
	bitset<mxn> done;
	void modify(int p,ll v){
		done[p] = true;
		bit[p] = bit[p+1]+v;
		return;
		/*
		for(;p<mxn;p+=p&-p)bit[p] += v;
		return;
 
	   */
	}
	ll getval(int s,int e){
		if(!done[s])return bit[s+1]-bit[e+1];
		return bit[s]-bit[e+1];
		/*
		int re = 0;
		for(;e>0;e-= e&-e)re += bit[e];
		s--;
		for(;s>0;s-= s&-s)re -= bit[s];
		return re;
 
	   */
	}
	int cnt = 0;
	void dfs1(int now){
		sz[now] = 1;
		for(auto nxt:tree[now]){
			if(nxt == par[now])continue;
			par[nxt] = now;
			dep[nxt] = dep[now]+1;
			dfs1(nxt);
			sz[now] += sz[nxt];
			if(!bs[now]||sz[bs[now]]<sz[nxt])bs[now] = nxt;
		}
		return;
	}
	void dfs2(int now,int top){
		idx[now] = ++cnt;
		link_top[now] = top;
		if(bs[now])dfs2(bs[now],top);
		for(auto nxt:tree[now]){
			if(nxt == par[now]||nxt == bs[now])continue;
			dfs2(nxt,nxt);
		}
		return;
	}
	pll LCA(int a,int b){
		pll re = pll(0,0);
		int ta = link_top[a],tb = link_top[b];
		while(ta != tb){
			if(dep[ta]<dep[tb]){
				swap(a,b);
				swap(ta,tb);
			}
			re.sc += getval(idx[ta],idx[a]);
			a = par[ta];ta = link_top[a];
		}
		if(idx[a]>idx[b])swap(a,b);
		re.sc += getval(idx[a],idx[b]);
		re.fs = a;
		return re;
	}
}
 
namespace CALC{
	ll ans = 0;
	ll sum[mxn],dp[mxn];
	void dfs(int now){
		sort(tree[now].begin(),tree[now].end(),[](int a,int b){return HLD::idx[a]>HLD::idx[b];});
		for(auto nxt:tree[now]){
			if(nxt == HLD::par[now])continue;
			dfs(nxt);
			sum[now] += dp[nxt];
		}
		dp[now] = max(dp[now],sum[now]);
		for(auto &i:req[now]){
			auto [a,b] = i.fs;
			int w = i.sc;
			ll ts = sum[now]+HLD::LCA(a,b).sc+w;
			dp[now] = max(dp[now],ts);
		}
		HLD::modify(HLD::idx[now],sum[now]-dp[now]);
	}
	void GO(){
		dfs(1);
		cout<<dp[1]<<'\n';
		return;
	}
}
 
int main(){
	ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin>>N;
	for(int i = 1;i<N;i++){
		int a,b;
		cin>>a>>b;
		tree[a].push_back(b);
		tree[b].push_back(a);
	}
	HLD::dfs1(1);
	HLD::dfs2(1,1);
	cin>>Q;
	while(Q--){
		int a,b,c;
		cin>>a>>b>>c;
		int h = HLD::LCA(a,b).fs;
		req[h].push_back(make_pair(pii(a,b),c));
	}
	CALC::GO();
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 8280 KB Output is correct
2 Correct 2 ms 8284 KB Output is correct
3 Correct 2 ms 8284 KB Output is correct
4 Correct 2 ms 8540 KB Output is correct
5 Correct 35 ms 11796 KB Output is correct
6 Correct 47 ms 36604 KB Output is correct
7 Correct 51 ms 28188 KB Output is correct
8 Correct 43 ms 12492 KB Output is correct
9 Correct 43 ms 23124 KB Output is correct
10 Correct 33 ms 12220 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 8280 KB Output is correct
2 Correct 2 ms 8284 KB Output is correct
3 Correct 2 ms 8796 KB Output is correct
4 Correct 66 ms 38616 KB Output is correct
5 Correct 67 ms 38828 KB Output is correct
6 Correct 81 ms 38868 KB Output is correct
7 Correct 77 ms 38680 KB Output is correct
8 Correct 68 ms 38856 KB Output is correct
9 Correct 66 ms 38772 KB Output is correct
10 Correct 84 ms 38976 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 8280 KB Output is correct
2 Correct 2 ms 8284 KB Output is correct
3 Correct 2 ms 8796 KB Output is correct
4 Correct 66 ms 38616 KB Output is correct
5 Correct 67 ms 38828 KB Output is correct
6 Correct 81 ms 38868 KB Output is correct
7 Correct 77 ms 38680 KB Output is correct
8 Correct 68 ms 38856 KB Output is correct
9 Correct 66 ms 38772 KB Output is correct
10 Correct 84 ms 38976 KB Output is correct
11 Correct 7 ms 9304 KB Output is correct
12 Correct 74 ms 38716 KB Output is correct
13 Correct 70 ms 38620 KB Output is correct
14 Correct 72 ms 38864 KB Output is correct
15 Correct 73 ms 38740 KB Output is correct
16 Correct 87 ms 38736 KB Output is correct
17 Correct 71 ms 38740 KB Output is correct
18 Correct 77 ms 38816 KB Output is correct
19 Correct 66 ms 38740 KB Output is correct
20 Correct 66 ms 38740 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 91 ms 13292 KB Output is correct
2 Correct 72 ms 38616 KB Output is correct
3 Correct 79 ms 29264 KB Output is correct
4 Correct 59 ms 13792 KB Output is correct
5 Correct 80 ms 27380 KB Output is correct
6 Correct 58 ms 13776 KB Output is correct
7 Correct 76 ms 27020 KB Output is correct
8 Correct 69 ms 13648 KB Output is correct
9 Correct 64 ms 38740 KB Output is correct
10 Correct 69 ms 24140 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 8280 KB Output is correct
2 Correct 2 ms 8284 KB Output is correct
3 Correct 2 ms 8284 KB Output is correct
4 Correct 2 ms 8540 KB Output is correct
5 Correct 35 ms 11796 KB Output is correct
6 Correct 47 ms 36604 KB Output is correct
7 Correct 51 ms 28188 KB Output is correct
8 Correct 43 ms 12492 KB Output is correct
9 Correct 43 ms 23124 KB Output is correct
10 Correct 33 ms 12220 KB Output is correct
11 Correct 3 ms 8536 KB Output is correct
12 Correct 2 ms 8796 KB Output is correct
13 Correct 3 ms 8540 KB Output is correct
14 Correct 3 ms 8540 KB Output is correct
15 Correct 2 ms 8540 KB Output is correct
16 Correct 3 ms 8540 KB Output is correct
17 Correct 3 ms 8540 KB Output is correct
18 Correct 3 ms 8540 KB Output is correct
19 Correct 4 ms 8736 KB Output is correct
20 Correct 3 ms 8796 KB Output is correct

Subtask #6
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 8280 KB Output is correct
2 Correct 2 ms 8284 KB Output is correct
3 Correct 2 ms 8284 KB Output is correct
4 Correct 2 ms 8540 KB Output is correct
5 Correct 35 ms 11796 KB Output is correct
6 Correct 47 ms 36604 KB Output is correct
7 Correct 51 ms 28188 KB Output is correct
8 Correct 43 ms 12492 KB Output is correct
9 Correct 43 ms 23124 KB Output is correct
10 Correct 33 ms 12220 KB Output is correct
11 Correct 2 ms 8280 KB Output is correct
12 Correct 2 ms 8284 KB Output is correct
13 Correct 2 ms 8796 KB Output is correct
14 Correct 66 ms 38616 KB Output is correct
15 Correct 67 ms 38828 KB Output is correct
16 Correct 81 ms 38868 KB Output is correct
17 Correct 77 ms 38680 KB Output is correct
18 Correct 68 ms 38856 KB Output is correct
19 Correct 66 ms 38772 KB Output is correct
20 Correct 84 ms 38976 KB Output is correct
21 Correct 7 ms 9304 KB Output is correct
22 Correct 74 ms 38716 KB Output is correct
23 Correct 70 ms 38620 KB Output is correct
24 Correct 72 ms 38864 KB Output is correct
25 Correct 73 ms 38740 KB Output is correct
26 Correct 87 ms 38736 KB Output is correct
27 Correct 71 ms 38740 KB Output is correct
28 Correct 77 ms 38816 KB Output is correct
29 Correct 66 ms 38740 KB Output is correct
30 Correct 66 ms 38740 KB Output is correct
31 Correct 91 ms 13292 KB Output is correct
32 Correct 72 ms 38616 KB Output is correct
33 Correct 79 ms 29264 KB Output is correct
34 Correct 59 ms 13792 KB Output is correct
35 Correct 80 ms 27380 KB Output is correct
36 Correct 58 ms 13776 KB Output is correct
37 Correct 76 ms 27020 KB Output is correct
38 Correct 69 ms 13648 KB Output is correct
39 Correct 64 ms 38740 KB Output is correct
40 Correct 69 ms 24140 KB Output is correct
41 Correct 3 ms 8536 KB Output is correct
42 Correct 2 ms 8796 KB Output is correct
43 Correct 3 ms 8540 KB Output is correct
44 Correct 3 ms 8540 KB Output is correct
45 Correct 2 ms 8540 KB Output is correct
46 Correct 3 ms 8540 KB Output is correct
47 Correct 3 ms 8540 KB Output is correct
48 Correct 3 ms 8540 KB Output is correct
49 Correct 4 ms 8736 KB Output is correct
50 Correct 3 ms 8796 KB Output is correct
51 Correct 71 ms 13512 KB Output is correct
52 Correct 71 ms 38680 KB Output is correct
53 Correct 75 ms 24588 KB Output is correct
54 Correct 56 ms 13784 KB Output is correct
55 Correct 91 ms 13324 KB Output is correct
56 Correct 79 ms 38716 KB Output is correct
57 Correct 83 ms 25996 KB Output is correct
58 Correct 61 ms 13584 KB Output is correct
59 Correct 87 ms 13696 KB Output is correct
60 Correct 68 ms 38728 KB Output is correct
61 Correct 98 ms 26308 KB Output is correct
62 Correct 68 ms 13704 KB Output is correct
63 Correct 81 ms 13240 KB Output is correct
64 Correct 67 ms 38664 KB Output is correct
65 Correct 78 ms 26440 KB Output is correct
66 Correct 72 ms 13708 KB Output is correct
67 Correct 84 ms 13564 KB Output is correct
68 Correct 66 ms 38736 KB Output is correct
69 Correct 74 ms 22352 KB Output is correct
70 Correct 62 ms 13876 KB Output is correct