C++ STL Set 2 (pair).cpp

//{ Driver Code Starts
#include <bits/stdc++.h>
using namespace std;

void add_pair(vector<pair<string, pair<int, int>>> &A, string str, int x, int y);
int get_size(vector<pair<string, pair<int, int>>> &A);
void print_values(vector<pair<string, pair<int, int>>> &A);
void sort_pair(vector<pair<string, pair<int, int>>> &A);

int main()
{
    // your code goes here
    int t;
    cin >> t;
    while (t--)
    {
        vector<pair<string, pair<int, int>>> A;
        int q;
        cin >> q;
        while (q--)
        {
            char c;
            cin >> c;
            if (c == 'a')
            {
                string name;
                cin >> name;
                int x, y;
                cin >> x >> y;
                add_pair(A, name, x, y);
            }
            if (c == 'b')
            {
                cout << get_size(A) << " ";
            }
            if (c == 'c')
            {
                print_values(A);
            }
            if (c == 'd')
            {
                sort_pair(A);
            }
        }
        cout << endl;
    }
    return 0;
}
// } Driver Code Ends

/* Inserts a pair  <string,   pair<x, y> > >    into the vector A */
void add_pair(vector<pair<string, pair<int, int>>> &A, string str, int x, int y)
{
    A.push_back({str, {x, y}});
}

/* Returns the size of the vector A */
int get_size(vector<pair<string, pair<int, int>>> &A)
{
    return A.size();
}

/* Prints space separated values of vector A */
void print_values(vector<pair<string, pair<int, int>>> &A)
{
    for (auto it : A)
    {
        cout << it.first << " " << it.second.first << " " << it.second.second << " ";
    }
}

bool cmp(pair<string, pair<int, int>> &p1, pair<string, pair<int, int>> &p2)
{
    return p1.second < p2.second;
}
/* Sorts the vector A based on value x and y*/
void sort_pair(vector<pair<string, pair<int, int>>> &A)
{
    sort(A.begin(), A.end(), cmp);
}