C. Registration system1300 / 哈希

Posted 2021-11-11 幽殇默

https://codeforces.com/problemset/problem/4/C

#include<bits/stdc++.h>
using namespace std;
unordered_map<string,int>mp;
int main(void)
{
	int n; cin>>n;
	for(int i=0;i<n;i++)
	{
		string s; cin>>s;
		if(mp.count(s)==0) cout<<"OK"<<endl,mp[s]++;
		else printf("%s%d\\n",s.c_str(),mp[s]),mp[s]++;
	}
	return 0;
}