oj.uz

답안 #960521

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
960521 2024-04-10T15:04:02 Z pcc Election Campaign (JOI15_election_campaign) C++17
100 / 100
 91 ms 38868 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;
	}
	int LCA1(int a,int b){
		int ta = link_top[a],tb = link_top[b];
		while(ta != tb){
			if(dep[ta]<dep[tb]){
				swap(a,b);
				swap(ta,tb);
			}
			a = par[ta];ta = link_top[a];
		}
		return (idx[a]<idx[b]?a:b);
	}
	int LCA(int a,int b){
		int re = 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 += getval(idx[ta],idx[a]);
			a = par[ta];ta = link_top[a];
		}
		if(idx[a]>idx[b])swap(a,b);
		re += getval(idx[a],idx[b]);
		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)+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::LCA1(a,b);
		req[h].push_back(make_pair(pii(a,b),c));
	}
	CALC::GO();
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 8284 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 11956 KB Output is correct
6 Correct 43 ms 36624 KB Output is correct
7 Correct 47 ms 28200 KB Output is correct
8 Correct 34 ms 12124 KB Output is correct
9 Correct 42 ms 23212 KB Output is correct
10 Correct 31 ms 12124 KB Output is correct

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 8280 KB Output is correct
2 Correct 2 ms 8280 KB Output is correct
3 Correct 2 ms 8796 KB Output is correct
4 Correct 67 ms 38820 KB Output is correct
5 Correct 68 ms 38820 KB Output is correct
6 Correct 64 ms 38740 KB Output is correct
7 Correct 67 ms 38740 KB Output is correct
8 Correct 66 ms 38736 KB Output is correct
9 Correct 73 ms 38736 KB Output is correct
10 Correct 83 ms 38784 KB Output is correct

Subtask #3
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 8280 KB Output is correct
2 Correct 2 ms 8280 KB Output is correct
3 Correct 2 ms 8796 KB Output is correct
4 Correct 67 ms 38820 KB Output is correct
5 Correct 68 ms 38820 KB Output is correct
6 Correct 64 ms 38740 KB Output is correct
7 Correct 67 ms 38740 KB Output is correct
8 Correct 66 ms 38736 KB Output is correct
9 Correct 73 ms 38736 KB Output is correct
10 Correct 83 ms 38784 KB Output is correct
11 Correct 7 ms 9304 KB Output is correct
12 Correct 68 ms 38676 KB Output is correct
13 Correct 74 ms 38740 KB Output is correct
14 Correct 70 ms 38684 KB Output is correct
15 Correct 75 ms 38868 KB Output is correct
16 Correct 69 ms 38740 KB Output is correct
17 Correct 71 ms 38828 KB Output is correct
18 Correct 69 ms 38736 KB Output is correct
19 Correct 65 ms 38740 KB Output is correct
20 Correct 66 ms 38740 KB Output is correct

Subtask #4
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 73 ms 13204 KB Output is correct
2 Correct 70 ms 38700 KB Output is correct
3 Correct 91 ms 29264 KB Output is correct
4 Correct 52 ms 13872 KB Output is correct
5 Correct 72 ms 27476 KB Output is correct
6 Correct 57 ms 13768 KB Output is correct
7 Correct 74 ms 26948 KB Output is correct
8 Correct 83 ms 13648 KB Output is correct
9 Correct 76 ms 38736 KB Output is correct
10 Correct 83 ms 24108 KB Output is correct

Subtask #5
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 8284 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 11956 KB Output is correct
6 Correct 43 ms 36624 KB Output is correct
7 Correct 47 ms 28200 KB Output is correct
8 Correct 34 ms 12124 KB Output is correct
9 Correct 42 ms 23212 KB Output is correct
10 Correct 31 ms 12124 KB Output is correct
11 Correct 3 ms 8540 KB Output is correct
12 Correct 3 ms 8796 KB Output is correct
13 Correct 3 ms 8536 KB Output is correct
14 Correct 2 ms 8540 KB Output is correct
15 Correct 2 ms 8540 KB Output is correct
16 Correct 3 ms 8792 KB Output is correct
17 Correct 3 ms 8540 KB Output is correct
18 Correct 3 ms 8540 KB Output is correct
19 Correct 2 ms 8536 KB Output is correct
20 Correct 3 ms 8796 KB Output is correct

Subtask #6
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 8284 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 11956 KB Output is correct
6 Correct 43 ms 36624 KB Output is correct
7 Correct 47 ms 28200 KB Output is correct
8 Correct 34 ms 12124 KB Output is correct
9 Correct 42 ms 23212 KB Output is correct
10 Correct 31 ms 12124 KB Output is correct
11 Correct 2 ms 8280 KB Output is correct
12 Correct 2 ms 8280 KB Output is correct
13 Correct 2 ms 8796 KB Output is correct
14 Correct 67 ms 38820 KB Output is correct
15 Correct 68 ms 38820 KB Output is correct
16 Correct 64 ms 38740 KB Output is correct
17 Correct 67 ms 38740 KB Output is correct
18 Correct 66 ms 38736 KB Output is correct
19 Correct 73 ms 38736 KB Output is correct
20 Correct 83 ms 38784 KB Output is correct
21 Correct 7 ms 9304 KB Output is correct
22 Correct 68 ms 38676 KB Output is correct
23 Correct 74 ms 38740 KB Output is correct
24 Correct 70 ms 38684 KB Output is correct
25 Correct 75 ms 38868 KB Output is correct
26 Correct 69 ms 38740 KB Output is correct
27 Correct 71 ms 38828 KB Output is correct
28 Correct 69 ms 38736 KB Output is correct
29 Correct 65 ms 38740 KB Output is correct
30 Correct 66 ms 38740 KB Output is correct
31 Correct 73 ms 13204 KB Output is correct
32 Correct 70 ms 38700 KB Output is correct
33 Correct 91 ms 29264 KB Output is correct
34 Correct 52 ms 13872 KB Output is correct
35 Correct 72 ms 27476 KB Output is correct
36 Correct 57 ms 13768 KB Output is correct
37 Correct 74 ms 26948 KB Output is correct
38 Correct 83 ms 13648 KB Output is correct
39 Correct 76 ms 38736 KB Output is correct
40 Correct 83 ms 24108 KB Output is correct
41 Correct 3 ms 8540 KB Output is correct
42 Correct 3 ms 8796 KB Output is correct
43 Correct 3 ms 8536 KB Output is correct
44 Correct 2 ms 8540 KB Output is correct
45 Correct 2 ms 8540 KB Output is correct
46 Correct 3 ms 8792 KB Output is correct
47 Correct 3 ms 8540 KB Output is correct
48 Correct 3 ms 8540 KB Output is correct
49 Correct 2 ms 8536 KB Output is correct
50 Correct 3 ms 8796 KB Output is correct
51 Correct 87 ms 13656 KB Output is correct
52 Correct 83 ms 38736 KB Output is correct
53 Correct 80 ms 24384 KB Output is correct
54 Correct 59 ms 13604 KB Output is correct
55 Correct 76 ms 13496 KB Output is correct
56 Correct 72 ms 38800 KB Output is correct
57 Correct 81 ms 25960 KB Output is correct
58 Correct 53 ms 13696 KB Output is correct
59 Correct 81 ms 13672 KB Output is correct
60 Correct 78 ms 38768 KB Output is correct
61 Correct 80 ms 26356 KB Output is correct
62 Correct 63 ms 13748 KB Output is correct
63 Correct 81 ms 13304 KB Output is correct
64 Correct 76 ms 38716 KB Output is correct
65 Correct 78 ms 26508 KB Output is correct
66 Correct 56 ms 13708 KB Output is correct
67 Correct 86 ms 13508 KB Output is correct
68 Correct 66 ms 38684 KB Output is correct
69 Correct 69 ms 22352 KB Output is correct
70 Correct 52 ms 13948 KB Output is correct