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C++ || STL || standard template libraries

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                                       C++ STL  1.      Pair :  Syntax :      pair <int,char> p1;     it creates a pair {2,'c'} like this.           pair <int,int> p2;     it creates a pair {2,3} like this .  Basic Code :  #include <bits/stdc++.h> using namespace std; int main() {     // cout<<"hello world\n";     pair <int,int> p1 = {1,2};     cout<<p1.first<< " "<< p1.second<<endl;          pair <int, pair<int ,char>> p2 = {1,{2,'c'}};     cout<<p2.first<<" "<<p2.second.first<<" "<<p2.second.second<<endl;          pair <int,int> arr[] = {{2,3},{4,5},{6,7}};     cout...
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Find the second lowest grade in the nested list:

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Given the names and grades for each student in a class of   students, store them in a nested list and print the name(s) of any student(s) having the second lowest grade. Hacker Rank Solution:     if  __ name__  ==  '__main__' :      student_list  =  []      for  _  in   range ( int ( input ())):          name  =  input ()          score  =  float ( input ())          student_list . append ([ name , score ])      # print(student_list)          scores_list  =  sorted ( list ( set ([ student [ 1 ]   for   student   in   student_list ]))) # print(scores_list) second_lowest_grade  =  scores_list [ 1 ] student_second_lowest_grade  =  ...
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