oj.uz

Submission #960513

# Submission time Handle Problem Language Result Execution time Memory
960513 2024-04-10T14:47:50 Z pcc Election Campaign (JOI15_election_campaign) C++17
30 / 100
 1000 ms 40344 KB 
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#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];
	void modify(int p,ll v){
		for(;p<mxn;p+=p&-p)bit[p] += v;
		return;
	}
	ll getval(int s,int e){
		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);
			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){
		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 2 ms 7516 KB Output is correct
2 Correct 2 ms 7652 KB Output is correct
3 Correct 3 ms 7516 KB Output is correct
4 Correct 2 ms 7516 KB Output is correct
5 Correct 35 ms 13136 KB Output is correct
6 Correct 45 ms 37768 KB Output is correct
7 Correct 58 ms 29248 KB Output is correct
8 Correct 28 ms 12636 KB Output is correct
9 Correct 52 ms 21300 KB Output is correct
10 Correct 27 ms 12636 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 7512 KB Output is correct
2 Correct 2 ms 7516 KB Output is correct
3 Correct 2 ms 7772 KB Output is correct
4 Correct 75 ms 39868 KB Output is correct
5 Correct 69 ms 40020 KB Output is correct
6 Correct 83 ms 39920 KB Output is correct
7 Correct 75 ms 40016 KB Output is correct
8 Correct 69 ms 39864 KB Output is correct
9 Correct 79 ms 39964 KB Output is correct
10 Correct 78 ms 39760 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 7512 KB Output is correct
2 Correct 2 ms 7516 KB Output is correct
3 Correct 2 ms 7772 KB Output is correct
4 Correct 75 ms 39868 KB Output is correct
5 Correct 69 ms 40020 KB Output is correct
6 Correct 83 ms 39920 KB Output is correct
7 Correct 75 ms 40016 KB Output is correct
8 Correct 69 ms 39864 KB Output is correct
9 Correct 79 ms 39964 KB Output is correct
10 Correct 78 ms 39760 KB Output is correct
11 Correct 9 ms 8284 KB Output is correct
12 Correct 77 ms 39888 KB Output is correct
13 Correct 80 ms 39904 KB Output is correct
14 Correct 73 ms 40016 KB Output is correct
15 Correct 78 ms 40132 KB Output is correct
16 Correct 80 ms 39944 KB Output is correct
17 Correct 79 ms 39972 KB Output is correct
18 Correct 73 ms 39924 KB Output is correct
19 Correct 81 ms 40004 KB Output is correct
20 Correct 81 ms 40344 KB Output is correct

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 207 ms 14604 KB Output is correct
2 Correct 83 ms 40028 KB Output is correct
3 Execution timed out 1070 ms 22504 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 7516 KB Output is correct
2 Correct 2 ms 7652 KB Output is correct
3 Correct 3 ms 7516 KB Output is correct
4 Correct 2 ms 7516 KB Output is correct
5 Correct 35 ms 13136 KB Output is correct
6 Correct 45 ms 37768 KB Output is correct
7 Correct 58 ms 29248 KB Output is correct
8 Correct 28 ms 12636 KB Output is correct
9 Correct 52 ms 21300 KB Output is correct
10 Correct 27 ms 12636 KB Output is correct
11 Correct 3 ms 7516 KB Output is correct
12 Correct 2 ms 7772 KB Output is correct
13 Correct 2 ms 7772 KB Output is correct
14 Correct 2 ms 7516 KB Output is correct
15 Correct 3 ms 7600 KB Output is correct
16 Correct 2 ms 7772 KB Output is correct
17 Correct 2 ms 7756 KB Output is correct
18 Correct 3 ms 7772 KB Output is correct
19 Correct 2 ms 7516 KB Output is correct
20 Correct 3 ms 7768 KB Output is correct

Subtask #6
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 7516 KB Output is correct
2 Correct 2 ms 7652 KB Output is correct
3 Correct 3 ms 7516 KB Output is correct
4 Correct 2 ms 7516 KB Output is correct
5 Correct 35 ms 13136 KB Output is correct
6 Correct 45 ms 37768 KB Output is correct
7 Correct 58 ms 29248 KB Output is correct
8 Correct 28 ms 12636 KB Output is correct
9 Correct 52 ms 21300 KB Output is correct
10 Correct 27 ms 12636 KB Output is correct
11 Correct 2 ms 7512 KB Output is correct
12 Correct 2 ms 7516 KB Output is correct
13 Correct 2 ms 7772 KB Output is correct
14 Correct 75 ms 39868 KB Output is correct
15 Correct 69 ms 40020 KB Output is correct
16 Correct 83 ms 39920 KB Output is correct
17 Correct 75 ms 40016 KB Output is correct
18 Correct 69 ms 39864 KB Output is correct
19 Correct 79 ms 39964 KB Output is correct
20 Correct 78 ms 39760 KB Output is correct
21 Correct 9 ms 8284 KB Output is correct
22 Correct 77 ms 39888 KB Output is correct
23 Correct 80 ms 39904 KB Output is correct
24 Correct 73 ms 40016 KB Output is correct
25 Correct 78 ms 40132 KB Output is correct
26 Correct 80 ms 39944 KB Output is correct
27 Correct 79 ms 39972 KB Output is correct
28 Correct 73 ms 39924 KB Output is correct
29 Correct 81 ms 40004 KB Output is correct
30 Correct 81 ms 40344 KB Output is correct
31 Correct 207 ms 14604 KB Output is correct
32 Correct 83 ms 40028 KB Output is correct
33 Execution timed out 1070 ms 22504 KB Time limit exceeded
34 Halted 0 ms 0 KB -