4C. Registration System - Codeforces Solution C++

➤  Problem Link : 4C. Registration System 

✅ C++ Solution :

 
#include<bits/stdc++.h>
using namespace std;

int main()
{
	unordered_map<string,int> um;
	int n;
	string s;
	cin>>n;
	while(n--)
	{
		cin>>s;
		if(um.find(s)==um.end())
		{
			um.insert(make_pair(s,0));
			cout<<"OK\n";
		}
		else
		{
			um[s]++;
			cout<<s<<um[s]<<"\n";
		}
	}
}

 

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About Utkarsh Gupta

I am a Member Technical at D.E. Shaw India Pvt. Ltd. CodingWithArt is a blog where you find tricks and solutions to challenging coding and development problems. I aim to build a universal tech platform for every enthusiast out there.