oj.uz

Submission #1035083

# Submission time Handle Problem Language Result Execution time Memory
1035083 2024-07-26T04:02:25 Z pcc Prize (CEOI22_prize) C++17
10 / 100
 3500 ms 767284 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;
		if(a == b)ans.push_back(pll(0,0));
		else{
			pii tans;
			tans.fs = 1ll*val1[a]+val1[b]-val1[t1.LCA(a,b)]*2ll;
			tans.sc = 1ll*val2[a]+val2[b]-val2[t2.LCA(a,b)]*2ll;
			ans.push_back(tans);
		}
	}
	for(auto &i:ans)cout<<i.fs<<' '<<i.sc<<'\n';
	cout<<endl;
	return 0;
}
//sig 13 = WA

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 1641 ms 220052 KB Output is correct
2 Correct 1635 ms 221232 KB Output is correct
3 Correct 894 ms 198336 KB Output is correct
4 Correct 878 ms 197484 KB Output is correct
5 Correct 891 ms 198820 KB Output is correct
6 Correct 1198 ms 201808 KB Output is correct
7 Correct 1184 ms 201800 KB Output is correct
8 Correct 1137 ms 201776 KB Output is correct
9 Correct 879 ms 198136 KB Output is correct
10 Correct 887 ms 198672 KB Output is correct
11 Correct 932 ms 197596 KB Output is correct
12 Correct 866 ms 198420 KB Output is correct

Subtask #2
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1729 ms 221316 KB Output is correct
2 Correct 1613 ms 219460 KB Output is correct
3 Runtime error 721 ms 190940 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 1284 ms 213916 KB Output is correct
2 Correct 1338 ms 214048 KB Output is correct
3 Runtime error 792 ms 384040 KB Execution killed with signal 6
4 Halted 0 ms 0 KB -

Subtask #4
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3320 ms 430024 KB Output is correct
2 Correct 3292 ms 430184 KB Output is correct
3 Runtime error 1758 ms 767284 KB Execution killed with signal 6
4 Halted 0 ms 0 KB -

Subtask #5
0 / 24.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3564 ms 436348 KB Time limit exceeded
2 Halted 0 ms 0 KB -