Submission #605423

#	Time	Username	Problem	Language	Result	Execution time	Memory
605423		AugustinasJucas	Permutation (APIO22_perm)	C++17	91.33 / 100	2 ms	384 KiB

perm

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

using namespace std;

vector<int> construct_permutation(long long k) {
    vector<int> init;
    int ind = 0;
    long long liko = 0;
    for(int i = 0; i < 64; i++) {
        long long bus = (1ll << i);
        if(bus > k) {
            // desim i-1 tu.
            for(int j = 0; j < i-1; j++) init.push_back(ind++);
            liko = k - (1ll << (i-1));
            break;
        }
    }
 //   cout << "liko = " << liko << ", popcnt = " << __builtin_popcount(liko) << endl;
    vector<int> ret;
    ind += __builtin_popcountll(liko) - 1;
    for(int i = 0; i < init.size(); i++) {
        if((1ll << i) & liko) {
            ret.push_back(ind);
            ind--;
        }
        ret.push_back(init[i]);
    }
   // cout << "ret = "; for(auto x : ret) cout << x << " ";
    //cout << endl;
    return ret;
}

Compilation message (stderr)

perm.cpp: In function 'std::vector<int> construct_permutation(long long int)':
perm.cpp:22:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |     for(int i = 0; i < init.size(); i++) {
      |                    ~~^~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 81.333333333 / 90