oj.uz

Submission #1035068

# Submission time Handle Problem Language Result Execution time Memory
1035068 2024-07-26T03:43:35 Z pcc Prize (CEOI22_prize) C++17
10 / 100
 3500 ms 436584 KB 
#include <bits/stdc++.h>
using namespace std;

#define pii pair<int,int>
#define fs first
#define sc second
#define ll long long
#define pll pair<ll,ll>
#define al4 array<ll,4>
#define ai4 array<int,4>

const int mxn = 1e6+10;
const int B = 20;

struct Tree{
	vector<vector<int>> par;
	vector<int> dfn;
	vector<pii> eul;
	vector<int> dep;
	vector<vector<int>> edges;
	int pt = 0;
	Tree(){}
	void init(int n){
		pt = 0;
		dfn.clear();
		eul = vector<pii>(n);
		dep = vector<int>(n);
		edges = vector<vector<int>>(n);
		par = vector<vector<int>>(n,vector<int>(B,0));
	}
	void add_edge(int a,int b){
		edges[a].push_back(b);
	}
	void dfs(int now = 1,int fa = 1){
		eul[now].fs = ++pt;
		dfn.push_back(now);
		par[now][0] = fa;
		for(int i = 1;i<B;i++)par[now][i] = par[par[now][i-1]][i-1];
		for(auto nxt:edges[now]){
			if(nxt == par[now][0])continue;
			par[nxt][0] = now;
			dep[nxt] = dep[now]+1;
			dfs(nxt,now);
		}
		eul[now].sc = pt;
	}
	int LCA(int a,int b){
		if(dep[a]<dep[b])swap(a,b);
		int d = dep[a]-dep[b];
		for(int i = B-1;i>=0;i--){
			if(d&(1<<i))a = par[a][i];
		}
		for(int i = B-1;i>=0;i--){
			if(par[a][i] != par[b][i])a = par[a][i],b = par[b][i];
		}
		return a==b?a:par[a][0];
	}
};

Tree t1,t2;
int rt1,rt2;
int N,K,Q,T;
int val1[mxn],val2[mxn];
vector<int> tar;

vector<pii> req;
vector<ai4> res;
vector<pii> ans;
int C = 0;
void ask(int a,int b){
	C++;
	assert(C<=K*2-2);
	cout<<"? "<<a<<' '<<b<<'\n';
	req.push_back(pii(a,b));
	res.push_back(ai4({0,0,0,0}));
	return;
}

int main(){
	ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	//cin.exceptions(cin.failbit);
	cin>>N>>K>>Q>>T;
	t1.init(N+1);t2.init(N+1);
	for(int i = 1;i<=N;i++){
		int p;
		cin>>p;
		if(p == -1)rt1 = i;
		else{
			t1.add_edge(p,i);
			t1.add_edge(i,p);
		}
	}
	for(int i = 1;i<=N;i++){
		int p;
		cin>>p;
		if(p == -1)rt2 = i;
		else{
			t2.add_edge(p,i);
			t2.add_edge(i,p);
		}
	}
	t1.dfs(rt1,rt1);t2.dfs(rt1,rt1);
	for(int i = 0;i<K;i++)tar.push_back(t1.dfn[i]);
	for(auto &i:tar)cout<<i<<' ';cout<<endl;
	int s = tar.size();
	sort(tar.begin(),tar.end(),[&](int a,int b){return t2.eul[a].fs<t2.eul[b].fs;});
	for(int i = 1;i<s;i++)tar.push_back(t2.LCA(tar[i],tar[i-1]));
	sort(tar.begin(),tar.end(),[&](int a,int b){return t2.eul[a].fs<t2.eul[b].fs;});
	tar.resize(unique(tar.begin(),tar.end())-tar.begin());
	assert(tar.size()<=K*2-1);
	for(auto &i:tar){
		if(i != rt1){
			ask(rt1,i);
		}
	}
	cout<<"!"<<endl;
	for(int i = 0;i<req.size();i++){
		auto [a,b] = req[i];
		for(auto &j:res[i])cin>>j;
		val1[b] = res[i][1];
		val2[b] = res[i][2]+res[i][3];
	}
	while(T--){
		int a,b;
		cin>>a>>b;
		pii tans;
		tans.fs = 1ll*val1[a]+val1[b]-val1[t1.LCA(a,b)]*2;
		tans.sc = 1ll*val2[a]+val2[b]-val2[t2.LCA(a,b)]*2;
		ans.push_back(tans);
	}
	for(auto &i:ans)cout<<i.fs<<' '<<i.sc<<'\n';
	cout<<endl;
	return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:104:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  104 |  for(auto &i:tar)cout<<i<<' ';cout<<endl;
      |  ^~~
Main.cpp:104:31: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
  104 |  for(auto &i:tar)cout<<i<<' ';cout<<endl;
      |                               ^~~~
In file included from /usr/include/c++/10/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:33,
                 from Main.cpp:1:
Main.cpp:110:19: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  110 |  assert(tar.size()<=K*2-1);
      |         ~~~~~~~~~~^~~~~~~
Main.cpp:117:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  117 |  for(int i = 0;i<req.size();i++){
      |                ~^~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2228 ms 219912 KB Output is correct
2 Correct 2051 ms 221232 KB Output is correct
3 Correct 1039 ms 198088 KB Output is correct
4 Correct 948 ms 197520 KB Output is correct
5 Correct 865 ms 198688 KB Output is correct
6 Correct 1183 ms 201816 KB Output is correct
7 Correct 1268 ms 201796 KB Output is correct
8 Correct 1177 ms 201588 KB Output is correct
9 Correct 890 ms 198116 KB Output is correct
10 Correct 880 ms 198684 KB Output is correct
11 Correct 886 ms 197436 KB Output is correct
12 Correct 897 ms 198452 KB Output is correct

Subtask #2
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1787 ms 221164 KB Output is correct
2 Correct 1715 ms 220040 KB Output is correct
3 Runtime error 741 ms 191068 KB Execution killed with signal 13
4 Halted 0 ms 0 KB -

Subtask #3
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1248 ms 214100 KB Output is correct
2 Correct 1342 ms 214048 KB Output is correct
3 Runtime error 651 ms 192160 KB Execution killed with signal 13
4 Halted 0 ms 0 KB -

Subtask #4
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3379 ms 430020 KB Output is correct
2 Correct 3465 ms 430640 KB Output is correct
3 Runtime error 1644 ms 386612 KB Execution killed with signal 13
4 Halted 0 ms 0 KB -

Subtask #5
0 / 24.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3533 ms 436584 KB Time limit exceeded
2 Halted 0 ms 0 KB -