Submission #744847

#	Time	Username	Problem	Language	Result	Execution time	Memory
744847		merlynn	Permutation (APIO22_perm)	C++17	Compilation error	0 ms	0 KiB

perm

#include <bits/stdc++.h>
using namespace std;

vector<int32_t> construct_permutation(long long k) {
	string bn="";
	while(k)
	{
		bn+=k%2+'0';
		k/=2;
	}
	reverse(bn.begin(),bn.end());
	vector<int32_t> ret;
	int cur=0;
	for(int i=1;i<bn.size();i++)
	{
		ret.push_back(cur++);
		if(bn[i]=='1')
			ret.insert(ret.begin(),cur++);
	}
	return ret;
}

int main(){
    return 0;
}

Compilation message (stderr)

perm.cpp: In function 'std::vector<int> construct_permutation(long long int)':
perm.cpp:14:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |  for(int i=1;i<bn.size();i++)
      |              ~^~~~~~~~~~
/usr/bin/ld: /tmp/ccT7fM5Z.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccZsKs3Z.o:perm.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status