Submission #1077626

#	Time	Username	Problem	Language	Result	Execution time	Memory
1077626		s_tree	Mechanical Doll (IOI18_doll)	C++17	84 / 100	105 ms	19192 KiB

doll

#include "doll.h"
#include <bits/stdc++.h>
using namespace std;
const int N = 1e6;
vector<int> x(N), y(N), c(N);
vector<int> state(N);
int nodecnt=0, n, pw=1;
int build(int l, int r) {
	if(l >= r)return 0;
	if(r < pw - n) {
		return -1;
	}
	int mid = (l+r)/2;
	int cur = ++nodecnt;
	x[cur-1] = build(l, mid);
	y[cur-1] = build(mid+1, r);
	return -cur;
}
void ins(int i, int val) {
	assert(i!=0);
	if(state[-i]) {
		state[-i]^=1;
		if(y[-i-1] == 0) {
			y[-i-1] = val;
		}
		else {
			ins(y[-i-1], val);
		}
	}
	else {
		state[-i]^=1;
		if(x[-i-1] == 0) {
			x[-i-1] = val;
		}
		else {
			ins(x[-i-1], val);
		}
	}
}
void create_circuit(int M, std::vector<int> A) {
	pw = 1;
	n = A.size();
	c=vector<int>(M+1, -1);
	while(pw < n) {
		pw*=2;
	}
	build(0, pw-1);
	for(int i = 1;i<n;i++) {
		ins(-1, A[i]);
	}
	if(n%2 == 1)ins(-1,-1);
	ins(-1,0);
	c[0] = A[0];
	while(x.size()>nodecnt)x.pop_back();
	while(y.size()>nodecnt)y.pop_back();
	answer(c, x, y);
}

Compilation message (stderr)

doll.cpp: In function 'void create_circuit(int, std::vector<int>)':
doll.cpp:54:16: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   54 |  while(x.size()>nodecnt)x.pop_back();
      |        ~~~~~~~~^~~~~~~~
doll.cpp:55:16: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   55 |  while(y.size()>nodecnt)y.pop_back();
      |        ~~~~~~~~^~~~~~~~

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