Search - Dictionary

Search III

Your task is to write a program of a simple dictionary which implements the following instructions:

• insert str: insert a string str in to the dictionary
• find str: if the distionary contains str, then print 'yes', otherwise print 'no'

Input

In the first line n, the number of instructions is given. In the following n lines, n instructions are given in the above mentioned format.

Output

Print yes or no for each find instruction in a line.

Constraints

• A string consists of 'A', 'C', 'G', or 'T'
• 1 ≤ length of a string ≤ 12
• n ≤ 1000000

Sample Input 1

5
insert A
insert T
insert C
find G
find A

Sample Output 1

no
yes

Sample Input 2

13
insert AAA
insert AAC
insert AGA
insert AGG
insert TTT
find AAA
find CCC
find CCC
insert CCC
find CCC
insert T
find TTT
find T

Sample Output 2

yes
no
no
yes
yes
yes

#include <iostream>
#include <map>
#include <string>
using namespace std;

int main()
{
	map<string, bool> T;
	int n;
	string com, str;
	cin >> n;
	for(int i = 0; i < n; ++ i)
	{
		cin >> com >> str;
		if(com[0] == 'i')
		{
			T[str] = true;
		}
		else if(com[0] == 'f')
		{
			if(T[str])	cout << "yes" << endl;
			else	cout << "no" << endl;
		}
	}
	
	return 0;
}