queue reconstruction by height
#include <bits/stdc++.h>
using namespace std;
void print_vector(vector<vector<auto> > v){
cout << "[";
for(int i = 0; i<v.size(); i++){
cout << "[";
for(int j = 0; j <v[i].size(); j++){
cout << v[i][j] << ", ";
}
cout << "],";
}
cout << "]"<<endl;
}
bool cmp(vector <int> a, vector <int> b){
if(a[0] == b[0])return a[1] > b[1];
return a[0] < b[0];
}
class Solution {
public:
vector<vector<int>> reconstructQueue(vector<vector<int>>& p) {
sort(p.begin(), p.end(), cmp);
vector < vector <int> > ans;
for(int i = p.size()-1; i>=0; i--){
ans.insert(ans.begin() + p[i][1], p[i]);
}
return ans;
}
};
main(){
Solution ob;
vector<vector<int>> v = {{7,0}, {4,4}, {7,1}, {5,0}, {6,1}, {5,2}};
print_vector(ob.reconstructQueue(v));
}