Submission #117175

#	Time	Username	Problem	Language	Result	Execution time	Memory
117175		tjd229	Unscrambling a Messy Bug (IOI16_messy)	C++14	100 / 100	7 ms	512 KiB

messy

#include <vector>
#include <string>

#include "messy.h"
std::string o;
void push(int s,int e) {
	if (s == e) return;
	std::string x = o;
	for (int i = s; i <= e; ++i) --x[i];
	int m = (s + e) >> 1;
	for (int i = s; i <= m; ++i) {
		++x[i]; add_element(x);
		--x[i];
	}
	push(s, m); push(1+m,e);
}
void perm(int s,int e,std::vector<int> seat, std::vector<int> &p) {
	if (s == e) {
		p[seat[0]] = s;
		return;
	}
	std::string x= o;
	std::vector<int> l, r;
	for (auto i : seat) --x[i];
	for (auto i : seat) {
		++x[i];
		if (check_element(x)) l.push_back(i);
		else r.push_back(i);
		--x[i];
	}
	perm(s, (s + e) >> 1, l,p);
	perm(1 + ((s + e) >> 1), e, r,p);
}
std::vector<int> restore_permutation(int n, int w, int r) {
	o.resize(n);
	for (int i = 0; i < n; ++i) o[i]='1';
	std::vector<int> p(n,0);
	std::vector<int> seat(n, 0);
	for (int i = 0; i < n; ++i) seat[i] = i;
	push(0,n-1);
    compile_set();
	perm(0,n-1,seat,p);
	return p;
}

• Subtask 1: 20 / 20
• Subtask 2: 18 / 18
• Subtask 3: 11 / 11
• Subtask 4: 21 / 21
• Subtask 5: 30 / 30