oj.uz

답안 #1099834

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1099834 2024-10-12T05:32:32 Z model_code 트리 (IOI24_tree) C++17
31 / 100
 2000 ms 68552 KB 
// time_limit/yiping-qnlog2n-hld.cpp

// Complexity: O(qnlog^2 n)
// One can change the 'map' in 'DS' into other DS to obtain a complexity of O(qnlog n)
#include<bits/stdc++.h>
#include"tree.h"
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
const int MAXN = 3e5 + 5;
const int inf = 0x3f3f3f3f;

struct Segment_Tree
{
	int mn[MAXN<<2], tag[MAXN<<2], n;
	#define ls(u) ((u)<<1)
	#define rs(u) ((u)<<1|1)
	#define lson(u) ls(u),l,mid
	#define rson(u) rs(u),mid+1,r
	inline void push_up(int u)
	{
		mn[u] = min(mn[ls(u)], mn[rs(u)]) + tag[u];
	}
	void build(int u,int l,int r)
	{
		mn[u] = 0; tag[u] = 0;
		if(l == r) return;
		int mid = (l+r)>>1;
		build(lson(u)); build(rson(u));
	}
	void add(int u,int l,int r,int ql,int qr,int k)
	{
		if(ql<=l && r<=qr){ tag[u] += k; mn[u] += k; return;}
		int mid = (l+r)>>1;
		if(ql<=mid) add(lson(u),ql,qr,k);
		if(mid<qr) add(rson(u),ql,qr,k);
		push_up(u);
	}
	int query(int u,int l,int r,int ql,int qr)
	{
		if(ql<=l && r<=qr) return mn[u];
		int mid = (l+r)>>1;
		if(ql<=mid && mid<qr) return min(query(lson(u),ql,qr), query(rson(u),ql,qr)) + tag[u];
		else return (ql<=mid? query(lson(u),ql,qr): query(rson(u),ql,qr)) + tag[u];
	}
	void init(int _n){ n = _n; build(1,1,n);}
	void add(int ql,int qr,int k){ if(ql<=qr) add(1,1,n,ql,qr,k);}
	int query(int ql,int qr){ return ql<=qr? query(1,1,n,ql,qr): inf;}
}tree;

int n;
vector<int> g[MAXN];
int anc[MAXN], wei[MAXN];

int siz[MAXN], dep[MAXN], son[MAXN];
void dfs_tree(int u,int fa)
{
	siz[u] = 1; son[u] = 0;
	for(int v: g[u]) if(v != fa)
	{
		dep[v] = dep[u] + 1;
		dfs_tree(v,u);
		siz[u] += siz[v];
		if(siz[v] > siz[son[u]]) son[u] = v;
	}
}

int dfn[MAXN], seq[MAXN], top[MAXN], curdfn;
void dfs_dfn(int u,int fa,int tp)
{
	top[u] = tp;
	dfn[u] = ++curdfn; seq[curdfn] = u;
	if(son[u]) dfs_dfn(son[u], u, tp);
	for(int v: g[u]) if(v != fa && v != son[u])
		dfs_dfn(v, u, v);
}

int getmin_path(int u,int v)// v is anc of u
{
	int res = inf;
	while(dep[top[u]] > dep[v])
		res = min(res, tree.query(dfn[top[u]], dfn[u])), u = anc[top[u]];
	res = min(res, tree.query(dfn[v] + 1, dfn[u]));
	return res;
}
void add_path(int u,int v,int k)// v is anc of u
{
	while(dep[top[u]] > dep[v])
		tree.add(dfn[top[u]], dfn[u], k), u = anc[top[u]];
	tree.add(dfn[v] + 1, dfn[u], k);
}

ll sum[MAXN];
set<pii> h[MAXN];

ll query(int ql,int qr)
{
	ll ans = 0;
	tree.init(n);
	for(int u=n; u>=1; --u)
	{
		h[u].clear();
		if(g[u].size() == 0)
		{
			ans += (ll)ql * wei[u];
			sum[u] = ql;
			h[u].emplace(wei[u], u);
			continue;
		}
		
		sum[u] = 0;
		h[u].emplace(wei[u], u);
		for(int v: g[u])
		{
			sum[u] += sum[v];
			if(h[u].size() < h[v].size())
				h[u].swap(h[v]);
			for(auto t: h[v])
				h[u].insert(t);
			h[v].clear();
		}
		
		while(sum[u] > qr)
		{
			auto v = h[u].begin() -> second;
			if(v == u)
			{
				ans += (sum[u] - qr) * wei[u];
				sum[u] = qr;
				break;
			}
			
			ll t = getmin_path(v, u);
			ll k = min(t, sum[u] - qr);
			
			if(k == 0)
			{
				h[u].erase(h[u].begin());
				continue;
			}
			
			ans += k * wei[v];
			add_path(v, u, -k);
			sum[u] -= k;
			
			if(t == k)
			{
				h[u].erase(h[u].begin());
			}
		}
		
		tree.add(dfn[u], dfn[u], sum[u] - ql);
	}
	
	return ans;
}

void init(vector<int> _anc, vector<int> _wei)
{
	n = (int)_anc.size();
	for(int i=1; i<=n; ++i)
		g[i].clear();
	for(int i=1; i<=n; ++i)
	{
		anc[i] = _anc[i-1] + 1;
		wei[i] = _wei[i-1];
		if(i > 1)
			g[anc[i]].emplace_back(i);
	}
	
	curdfn = 0; dep[1] = 0;
	dfs_tree(1,0);
	dfs_dfn(1,0,1);
}

Subtask #0
0.0 / 0.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 21596 KB Output is correct

Subtask #1
0.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 581 ms 68020 KB Output is correct
2 Correct 541 ms 67916 KB Output is correct
3 Correct 925 ms 62432 KB Output is correct
4 Correct 1795 ms 63472 KB Output is correct
5 Correct 1848 ms 63824 KB Output is correct
6 Correct 1402 ms 60460 KB Output is correct
7 Execution timed out 2043 ms 61764 KB Time limit exceeded
8 Halted 0 ms 0 KB -

Subtask #2
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 15 ms 21852 KB Output is correct
2 Correct 17 ms 21852 KB Output is correct
3 Correct 15 ms 21848 KB Output is correct
4 Correct 16 ms 21848 KB Output is correct
5 Correct 15 ms 21852 KB Output is correct
6 Correct 24 ms 21852 KB Output is correct
7 Correct 16 ms 21852 KB Output is correct
8 Correct 13 ms 21836 KB Output is correct

Subtask #3
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 15 ms 21852 KB Output is correct
2 Correct 17 ms 21852 KB Output is correct
3 Correct 15 ms 21848 KB Output is correct
4 Correct 16 ms 21848 KB Output is correct
5 Correct 15 ms 21852 KB Output is correct
6 Correct 24 ms 21852 KB Output is correct
7 Correct 16 ms 21852 KB Output is correct
8 Correct 13 ms 21836 KB Output is correct
9 Correct 216 ms 32896 KB Output is correct
10 Correct 200 ms 34368 KB Output is correct
11 Correct 229 ms 32312 KB Output is correct
12 Correct 287 ms 35196 KB Output is correct
13 Correct 218 ms 29308 KB Output is correct
14 Correct 221 ms 28716 KB Output is correct
15 Correct 337 ms 27004 KB Output is correct
16 Correct 341 ms 29308 KB Output is correct
17 Correct 274 ms 27004 KB Output is correct
18 Correct 330 ms 29676 KB Output is correct
19 Correct 410 ms 28024 KB Output is correct
20 Correct 450 ms 29184 KB Output is correct
21 Correct 270 ms 26768 KB Output is correct
22 Correct 277 ms 29588 KB Output is correct

Subtask #4
0.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 2037 ms 68552 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 2037 ms 68552 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 2009 ms 59692 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0.0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 21596 KB Output is correct
2 Correct 581 ms 68020 KB Output is correct
3 Correct 541 ms 67916 KB Output is correct
4 Correct 925 ms 62432 KB Output is correct
5 Correct 1795 ms 63472 KB Output is correct
6 Correct 1848 ms 63824 KB Output is correct
7 Correct 1402 ms 60460 KB Output is correct
8 Execution timed out 2043 ms 61764 KB Time limit exceeded
9 Halted 0 ms 0 KB -