oj.uz

답안 #960715

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
960715 2024-04-11T01:08:00 Z pcc Election Campaign (JOI15_election_campaign) C++17
100 / 100
 89 ms 32108 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,rt;
 
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(rt);
		cout<<dp[rt]<<'\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);
	}
  rt = (N+1)>>1;
	HLD::dfs1(rt);
	HLD::dfs2(rt,rt);
	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 3 ms 8284 KB Output is correct
4 Correct 3 ms 8540 KB Output is correct
5 Correct 40 ms 13016 KB Output is correct
6 Correct 37 ms 25424 KB Output is correct
7 Correct 43 ms 25424 KB Output is correct
8 Correct 30 ms 13396 KB Output is correct
9 Correct 51 ms 25684 KB Output is correct
10 Correct 30 ms 13396 KB Output is correct

Subtask #2
5.0 / 5.0

# 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 3 ms 8536 KB Output is correct
4 Correct 62 ms 28672 KB Output is correct
5 Correct 60 ms 28708 KB Output is correct
6 Correct 63 ms 28768 KB Output is correct
7 Correct 60 ms 28752 KB Output is correct
8 Correct 71 ms 28672 KB Output is correct
9 Correct 58 ms 28664 KB Output is correct
10 Correct 59 ms 28536 KB Output is correct

Subtask #3
5.0 / 5.0

# 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 3 ms 8536 KB Output is correct
4 Correct 62 ms 28672 KB Output is correct
5 Correct 60 ms 28708 KB Output is correct
6 Correct 63 ms 28768 KB Output is correct
7 Correct 60 ms 28752 KB Output is correct
8 Correct 71 ms 28672 KB Output is correct
9 Correct 58 ms 28664 KB Output is correct
10 Correct 59 ms 28536 KB Output is correct
11 Correct 7 ms 9308 KB Output is correct
12 Correct 61 ms 29012 KB Output is correct
13 Correct 59 ms 29012 KB Output is correct
14 Correct 65 ms 29008 KB Output is correct
15 Correct 61 ms 29012 KB Output is correct
16 Correct 64 ms 28996 KB Output is correct
17 Correct 79 ms 28940 KB Output is correct
18 Correct 64 ms 28956 KB Output is correct
19 Correct 66 ms 28864 KB Output is correct
20 Correct 63 ms 29012 KB Output is correct

Subtask #4
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 76 ms 13508 KB Output is correct
2 Correct 60 ms 28760 KB Output is correct
3 Correct 68 ms 25352 KB Output is correct
4 Correct 58 ms 16252 KB Output is correct
5 Correct 79 ms 32108 KB Output is correct
6 Correct 53 ms 16196 KB Output is correct
7 Correct 79 ms 31568 KB Output is correct
8 Correct 68 ms 15940 KB Output is correct
9 Correct 65 ms 28744 KB Output is correct
10 Correct 77 ms 31656 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 3 ms 8284 KB Output is correct
4 Correct 3 ms 8540 KB Output is correct
5 Correct 40 ms 13016 KB Output is correct
6 Correct 37 ms 25424 KB Output is correct
7 Correct 43 ms 25424 KB Output is correct
8 Correct 30 ms 13396 KB Output is correct
9 Correct 51 ms 25684 KB Output is correct
10 Correct 30 ms 13396 KB Output is correct
11 Correct 3 ms 8536 KB Output is correct
12 Correct 2 ms 8536 KB Output is correct
13 Correct 3 ms 8540 KB Output is correct
14 Correct 3 ms 8540 KB Output is correct
15 Correct 3 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 8536 KB Output is correct
19 Correct 2 ms 8540 KB Output is correct
20 Correct 3 ms 8540 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 3 ms 8284 KB Output is correct
4 Correct 3 ms 8540 KB Output is correct
5 Correct 40 ms 13016 KB Output is correct
6 Correct 37 ms 25424 KB Output is correct
7 Correct 43 ms 25424 KB Output is correct
8 Correct 30 ms 13396 KB Output is correct
9 Correct 51 ms 25684 KB Output is correct
10 Correct 30 ms 13396 KB Output is correct
11 Correct 2 ms 8284 KB Output is correct
12 Correct 2 ms 8284 KB Output is correct
13 Correct 3 ms 8536 KB Output is correct
14 Correct 62 ms 28672 KB Output is correct
15 Correct 60 ms 28708 KB Output is correct
16 Correct 63 ms 28768 KB Output is correct
17 Correct 60 ms 28752 KB Output is correct
18 Correct 71 ms 28672 KB Output is correct
19 Correct 58 ms 28664 KB Output is correct
20 Correct 59 ms 28536 KB Output is correct
21 Correct 7 ms 9308 KB Output is correct
22 Correct 61 ms 29012 KB Output is correct
23 Correct 59 ms 29012 KB Output is correct
24 Correct 65 ms 29008 KB Output is correct
25 Correct 61 ms 29012 KB Output is correct
26 Correct 64 ms 28996 KB Output is correct
27 Correct 79 ms 28940 KB Output is correct
28 Correct 64 ms 28956 KB Output is correct
29 Correct 66 ms 28864 KB Output is correct
30 Correct 63 ms 29012 KB Output is correct
31 Correct 76 ms 13508 KB Output is correct
32 Correct 60 ms 28760 KB Output is correct
33 Correct 68 ms 25352 KB Output is correct
34 Correct 58 ms 16252 KB Output is correct
35 Correct 79 ms 32108 KB Output is correct
36 Correct 53 ms 16196 KB Output is correct
37 Correct 79 ms 31568 KB Output is correct
38 Correct 68 ms 15940 KB Output is correct
39 Correct 65 ms 28744 KB Output is correct
40 Correct 77 ms 31656 KB Output is correct
41 Correct 3 ms 8536 KB Output is correct
42 Correct 2 ms 8536 KB Output is correct
43 Correct 3 ms 8540 KB Output is correct
44 Correct 3 ms 8540 KB Output is correct
45 Correct 3 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 8536 KB Output is correct
49 Correct 2 ms 8540 KB Output is correct
50 Correct 3 ms 8540 KB Output is correct
51 Correct 88 ms 16684 KB Output is correct
52 Correct 61 ms 28944 KB Output is correct
53 Correct 79 ms 27148 KB Output is correct
54 Correct 54 ms 16536 KB Output is correct
55 Correct 81 ms 16296 KB Output is correct
56 Correct 64 ms 28852 KB Output is correct
57 Correct 72 ms 26248 KB Output is correct
58 Correct 60 ms 16396 KB Output is correct
59 Correct 72 ms 16460 KB Output is correct
60 Correct 60 ms 29032 KB Output is correct
61 Correct 74 ms 29808 KB Output is correct
62 Correct 55 ms 16724 KB Output is correct
63 Correct 74 ms 16140 KB Output is correct
64 Correct 66 ms 29020 KB Output is correct
65 Correct 79 ms 24628 KB Output is correct
66 Correct 53 ms 16524 KB Output is correct
67 Correct 80 ms 15932 KB Output is correct
68 Correct 65 ms 29012 KB Output is correct
69 Correct 89 ms 29216 KB Output is correct
70 Correct 60 ms 16372 KB Output is correct