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main.cs
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using System;
using System.Linq;
using System.IO;
using System.Text;
using System.Collections;
using System.Collections.Generic;
class Solution {
static void Main(string[] args) {
int numElems = int.Parse(Console.ReadLine());
int numFiles = int.Parse(Console.ReadLine());
Dictionary<string, string> map = new Dictionary<string, string>();
for (int i = 0; i < numElems; i++) {
string[] inputs = Console.ReadLine().Split(' ');
string ext = inputs[0];
string mt = inputs[1];
map.Add(ext.ToLower(), mt);
}
for (int i = 0; i < numFiles; i++) {
string fname = Console.ReadLine();
string ext = Path.GetExtension(fname).ToLower();
if (ext.Length > 1) {
ext = ext.Substring(1);
}
string mime = "";
Console.Error.WriteLine(ext);
if (map.TryGetValue(ext, out mime)) {
Console.WriteLine(mime);
} else {
Console.WriteLine("UNKNOWN");
}
}
// To debug: Console.Error.WriteLine("Debug messages...");
}
}