Submission #658303

#	Time	Username	Problem	Language	Result	Execution time	Memory
658303		Zena_Hossam	Permutation (APIO22_perm)	C++17	10 / 100	1090 ms	880 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)
{
    vector<pair<ll,ll>>v;
    vector<int>s,x;
    long long l=1;
    for(ll i=0;i<1e18;i++)
    {
        v.push_back({l-1,i});
        l*=2;
        if(l-1>1e18)break;
    }
    ll p=k-2;k--;
    while(1)
    {
        pair<ll,ll>h={k,0};
        ll o=upper_bound(v.begin(),v.end(),h)-v.begin();
        while(v[o].first>k)o--;
        for(ll i=p-v[o].second+1;i<=p;i++){
            s.push_back(i);
        }
     //   cout<<v[o].first<<" "<<v[o].second<<" "<<k<<"\n";
        p-=v[o].second;
        k-=v[o].first;
        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:33:17: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |     for(ll i=0;i<x.size();i++)
      |                ~^~~~~~~~~
perm.cpp:37:17: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |     for(ll i=0;i<x.size();i++)
      |                ~^~~~~~~~~

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