Submission #1311496

#	Time	Username	Problem	Language	Result	Execution time	Memory
1311496		settop	Permutation (APIO22_perm)	C++20	0 / 100	1 ms	336 KiB

perm

#include<bits/stdc++.h>
//#include "perm.h"

using namespace std;
#define ll long long
#define fall(i,a,b) for(int i=a;i<=b;i++)
#define rfall(i,a,b) for(int i=a;i>=b;i--)
#define sz(x) (int)x.size()
#define pb push_back

vector<int> construct_permutation(long long k){
	bool ok=0;
	int msb;
	vector<int> ans;
	for(int i=60;i>0;i--){
		if(!ok && !(k & (1LL<<i))) continue;
		if(!ok){
			ok=1;
			msb=i;
			if((k & (1LL<<(i-1)))) ans={1,0}; //resposta 3
			else ans={0};
			i--;
			continue;
		}
	
		int mask=0;
		if((k&(1LL<<i))) mask+=2;
		if((k&(1LL<<(i-1)))) mask++;

		if(!mask){
			int x=sz(ans);
			ans.pb(x); ans.pb(x+1);
		}
		else if(mask==1){
			for(auto &x:ans) x++;
			int x=sz(ans);
			ans.pb(x+1); ans.pb(x+2); ans.pb(0);
		}
		else if(mask==2){
			for(auto &u:ans) u++;
			int x=sz(ans); 
			ans.pb(x+1); ans.pb(0); ans.pb(x+2);
		}
		else{
			int p0=300,p1=300;
			fall(i,0,sz(ans)-1){
				if(ans[i]==0) p0=i;
				if(ans[i]==1) p1=i;
			}

			if(p0>p1){
				for(auto &u:ans) if(u>=2) u++;
				int x=sz(ans);
				ans.pb(x+1); ans.pb(x+2); ans.pb(2);
			}
			else{
				for(auto &u:ans){
					if(u>=2) u++;
					u++;
				}
				int x=sz(ans);
				ans.pb(x+2); ans.pb(x+3); ans.pb(2); ans.pb(0);
			}
		}
		i--;
	}

	if(msb%2==0){
		if(k%2==0){
			int x=sz(ans); ans.pb(x);
		}
		else{
			for(auto &u:ans) u++;
			int x=sz(ans); ans.pb(x+1); ans.pb(0);
		}
	}

	return ans;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 90