lambda
#include <algorithm>
#include <functional>
#include <iostream>
#include<string>
#include<vector>
#include <algorithm>
using namespace std;
void construct(vector<int>&v,int k) {
auto compare = [](int k) { return [k](int i, int j) {
return i+k < j+j;
}; };
int n{}; //
for (k = 1; k <= n; k *= 2) {
sort(v.begin(), v.end(), compare(k));
}
}
int main(){
vector<int>v(5);
for(int i=0;i<5;i++){
v[i]=i;
}
int k=0;
construct(v,k);
}
