Submission #1281285

#	Time	Username	Problem	Language	Result	Execution time	Memory
1281285		WH8	Mechanical Doll (IOI18_doll)	C++20	37 / 100	83 ms	14744 KiB

doll

#include "doll.h"
#include <bits/stdc++.h>
using namespace std;

void create_circuit(int M, vector<int> A) {
	int n = A.size();
	vector<int> C(M + 1);
	C[0] = -1;
	for (int i = 1; i <= M; ++i) {
		C[i] = -1;
	}
	int tar=1;
	while(tar < (int)A.size()+1){
		tar*=2;
	}
	while((int)A.size()<tar-1){
		A.push_back(-1);
	}
	A.push_back(0);
	int nw=1;
	vector<int> X(2*n, 1e9), Y(2*n, 1e9);
	auto dfs=[&](auto && dfs, int s, int e, vector<int> v)->int {
		vector<int> l, r;
		int m=(s+e)/2;
		assert((int)v.size()==e-s+1);
		if(s==e){
			return A[v[0]];
		}
		for(int i=0;i<(int)v.size();i++){
			if(i%2==0)l.push_back(v[i]);
			else r.push_back(v[i]);
		}
		int cn=nw;
		nw++;
		X[cn]=dfs(dfs, s, m, l);
		Y[cn]=dfs(dfs, m+1, e, r);
		return -cn;
	};
	vector<int> temp(A.size());
	iota(temp.begin(),temp.end(),0);
	dfs(dfs, 0, (int)temp.size()-1, temp);
	vector<int> ansx, ansy;
	for(int i=1;i<nw;i++){
		ansx.push_back(X[i]);
		ansy.push_back(Y[i]);
	}
	answer(C, ansx, ansy);
}
/*
4 4
1 2 1 3
*/

• Subtask 1: 0 / 2
• Subtask 2: 0 / 4
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 9 / 18
• Subtask 6: 28 / 56