Submission #658324

#	Time	Username	Problem	Language	Result	Execution time	Memory
658324		Zena_Hossam	Permutation (APIO22_perm)	C++17	10 / 100	2 ms	340 KiB

perm

#include<bits/stdc++.h>
#include "perm.h"
//#include "grader.cpp"
#define  ll long long
using namespace std;
std::vector<int> construct_permutation(long long k)
{
    ll p=k-2;k--;
    vector<int>s,x;
    while(1)
    {
        ll l=0,r=60,p1,h;
        while(l<=r)
        {
            ll mid=(l+r)/2;
            p1=(1<<mid)-1;
            if(k>=p1)
            {
                h=mid;
                l=mid+1;
            }
            else r=mid-1;
        }
        for(ll i=p-h+1;i<=p;i++){
            s.push_back(i);
        }
     //   cout<<v[o].first<<" "<<v[o].second<<" "<<k<<"\n";
        p-=h;
        k-=((1<<h)-1);
        if(k<=0)break;
    }x=s;
    sort(x.begin(),x.end());
    map<ll,ll>m;
    for(ll i=0;i<x.size();i++)
    {
        m[x[i]]=i;
    }
    for(ll i=0;i<x.size();i++)
    {
        s[i]=m[s[i]];
    }
    return s;
}

Compilation message (stderr)

perm.cpp: In function 'std::vector<int> construct_permutation(long long int)':
perm.cpp:34:17: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |     for(ll i=0;i<x.size();i++)
      |                ~^~~~~~~~~
perm.cpp:38:17: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |     for(ll i=0;i<x.size();i++)
      |                ~^~~~~~~~~
perm.cpp:29:15: warning: 'h' may be used uninitialized in this function [-Wmaybe-uninitialized]
   29 |         k-=((1<<h)-1);
      |             ~~^~~~

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