Get it, run it a few times, just ask

#include<iostream>
 #include<map> 
using namespace std; 
int main() 
{
    
     
map<char,int> mp; 
mp['a']=20;
mp['b']=30;
mp['c']=40;
printf("%d ",mp.size());
map<char,int>::iterator it=mp.find('c'); 
printf("%c %d\n",it->first,it->second);
 }