Submission #1023318

#	Time	Username	Problem	Language	Result	Execution time	Memory
1023318		vjudge1	Unscrambling a Messy Bug (IOI16_messy)	C++17	100 / 100	2 ms	632 KiB

messy

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

void add_element(std::string x);
bool check_element(std::string x);
void compile_set();

int n;
int i, j;
vector<int> ans;

string get(int l, int r){
	string s = string(n, '0');
	for(int i = l; i <= r; i++) s[i] = '1';
	return s;
}

void calc1(int l = 0, int r = n - 1){
	if(l == r) return;
	int mid = (l + r) >> 1;
	string s = get(l, r);
	for(int i = l; i <= mid; i++){
		s[i] = '0';
		add_element(s);
		s[i] = '1';
	}
	calc1(l, mid); 
	calc1(mid+1, r);
}

void calc2(vector<int> v, int l = 0, int r = n - 1){
	if(l == r) ans[v.back()] = l;
	else{
		int mid = (l + r) >> 1;
		vector<int> vl, vr;
		string s(n, '0');
		for(int i: v) s[i] = '1';
		for(int i: v){
			s[i] = '0';
			if(check_element(s)) vl.push_back(i);
			else vr.push_back(i); s[i] = '1';
		}
		calc2(vl, l, mid); 
		calc2(vr, mid+1, r);
	}
}

vector<int> restore_permutation(int N, int w, int r){
	n = N;
	ans = vector<int>(n, 0);
	vector<int> v;
	for(int i = 0; i < n; i++){
		v.push_back(i);
	}
	calc1();
	compile_set();
	calc2(v);
	return ans;
}

Compilation message (stderr)

messy.cpp: In function 'void calc2(std::vector<int>, int, int)':
messy.cpp:41:4: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
   41 |    else vr.push_back(i); s[i] = '1';
      |    ^~~~
messy.cpp:41:26: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'else'
   41 |    else vr.push_back(i); s[i] = '1';
      |                          ^

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