Submission #605435

#	Time	Username	Problem	Language	Result	Execution time	Memory
605435		AugustinasJucas	Permutation (APIO22_perm)	C++17	10 / 100	1078 ms	1348 KiB

perm

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

using namespace std;

vector<int> construct_permutation(long long k) {
    vector<int> RET(3000, 0);
    long long K = k;
    for(int H = 0; H < k-1; H++){
        k = K - H;
        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 + H;
        for(int i = 0; i < H; i++) {
            ret.push_back(ind--);
        }
        for(int i = 0; i < init.size(); i++) {
            if((1ll << i) & liko) {
                ret.push_back(ind);
                ind--;
            }
            ret.push_back(init[i]);
        }
        if(ret.size() < RET.size()) {
            RET = ret;
        }
       // 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:29:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |         for(int i = 0; i < init.size(); i++) {
      |                        ~~^~~~~~~~~~~~~

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