add: tutorial 4

Author: abhishekjiitr

Diff for: Tutorial 4/1.cpp

@@ -0,0 +1,102 @@
+#include <iostream>
+#include <stdio.h>
+#include <set>
+
+using namespace std;
+
+char alphabet[256];
+set<int> final_states;
+
+bool isFinal(unsigned int num)
+{
+	unsigned int check=1;
+	for(int j=0 ; j < 32 ; j++)
+	{
+		if ( num & check )
+			if ( final_states.find(j) != final_states.end() )
+				return true;
+		check <<= 1;
+	}
+	return false;
+}
+
+unsigned int addstate(unsigned int state, int pos)
+{
+	int x=1;
+	for(int i=0; i<pos-1; i++)
+		x = x << 1;
+	return state | x;
+}
+
+int main()
+{
+	freopen("input.in", "r", stdin);
+	int asize;
+	cin >> asize;
+	cout << asize<<endl;
+	char myalphabet;
+	for(int i=0 ; i<asize ; i++)
+		{
+			cin >> myalphabet;
+			alphabet[myalphabet] = 1;
+			cout << myalphabet << endl;
+		}
+	int n;
+	cin >> n;
+	int total_states = 1 << n;
+	int table[total_states][asize];
+	cout << n << " " << total_states;
+	for (unsigned int i=0 ; i<n ; i++ )
+	{
+		for (int j=0 ; j< 256 ; j++ )
+		{
+			if ( not alphabet[j] )
+				continue;
+
+			int to_states;
+			cin >> to_states;
+			unsigned int state = 0;
+			for (int k=0 ; k<to_states ; k++)
+			{
+				int mystate;
+				cin >> mystate;
+				state = addstate(state, mystate);
+			}
+			table[1<<i][j] = state;
+		}
+	}
+
+	for (unsigned int i=0 ; i< 1<<n ; i++)
+	{	
+		unsigned int current = i;
+
+		for (int j=0 ; j<256 ; j++ )
+		{
+			if ( not alphabet[j] )
+				continue;
+			int check=1;
+			for(int k=0 ; k<32 ; k++)
+			{
+				if ( check & current )
+				{
+					unsigned int reachable = table[k][j];
+					table[current][j] |= reachable;
+				}
+				check <<= 1;
+			}
+		}
+	}
+
+	int final_size;
+	cin >> final_size;
+	for(int i=0 ; i<final_size ; i++)
+	{
+		int fstate;
+		cin >> fstate;
+		final_states.insert(fstate);
+	}
+
+	string s;
+	cin >> s;
+	
+}

Diff for: Tutorial 4/input.in

@@ -0,0 +1,16 @@
+2
+a b
+
+4
+2 1 2
+0
+2 1 2
+0
+0
+2 1 3
+2 1 2 
+0
+
+2
+0 3
+ab