Submission #1117572

#	Time	Username	Problem	Language	Result	Execution time	Memory
1117572		erering	Permutation (APIO22_perm)	C++17	0 / 100	1 ms	336 KiB

perm

#include <bits/stdc++.h>
#include "perm.h"
using namespace std;
//#define int long long
#define endl '\n'
#define pb push_back
//const int MOD=819276405795233,MAXN=1e6+5,inf=1e9+5;
bool flag=1;
vector<int> construct_permutation(long long k)
{
    deque<int> dq;
    int cnt=-1,x=1,r=1;
    if(flag)r=0;
    flag=0;
    while (x-r <= k) {
        x *= 2;
        cnt++;
    }
    x-=r;
    x /= 2;
   // cout<<k<<' '<<cnt<<' '<<x<<endl;
    for (int i = cnt-1; i >= 0; i--)dq.push_front(i);
    k -= x;
    vector<int> v;
    if(k>0)v=construct_permutation(k);
    for(int i=0;i<v.size();i++)v[i]+=dq.size();
    for(int i=0;i<dq.size();i++)v.pb(dq[i]);
    return v;
}
/*signed main()
{
    vector<int> v=construct_permutation(14);
    for(auto i:v)cout<<i<<' ';

}*/

Compilation message (stderr)

perm.cpp: In function 'std::vector<int> construct_permutation(long long int)':
perm.cpp:26:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |     for(int i=0;i<v.size();i++)v[i]+=dq.size();
      |                 ~^~~~~~~~~
perm.cpp:27:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::deque<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |     for(int i=0;i<dq.size();i++)v.pb(dq[i]);
      |                 ~^~~~~~~~~~

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