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Female co passenger hack

The female co-passenger hack. I came across this trick on the internet. When you need to book a ticket on IRCTC (Indian Railways), book two seats instea of one, and cancel one after some days. One in your name and one in fake Female name to get a girls in the compartment. The IRCTC algorithm works that way.
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C library function - qsort()

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Description               The C library function void qsort(void *base, size_t nitems, size_t size, int (*compar)(const void *, const void*)) sorts an array. Parameters base -- This is the pointer to the first element of the array to be sorted. nitems -- This is the number of elements in the array pointed by base. size -- This is the size in bytes of each element in the array. compar -- This is the function that compares two elements. Return Value This function does not return any value Code   #include <stdio.h> #include <stdlib.h> int values [] = { 88 , 56 , 100 , 2 , 25 }; int cmpfunc ( const void * a , const void * b ) { return ( *( int *) a - *( int *) b ); } int main () { int n ; printf ( "Before sorting the list is: \n" ); for ( n = 0 ; n < 5 ; n ++ ) { printf ( "%d " , values [ n ]); } qsort (...
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Wildcard Pattern Matching (DP)

Given a text and a wildcard pattern, implement wildcard pattern matching algorithm that finds if wildcard pattern is matched with text. The matching should cover the entire text (not partial text). The wildcard pattern can include the characters ‘?’ and ‘*’ ‘?’ – matches any single character ‘*’ – Matches any sequence of characters (including the empty sequence) Text = "baaabab", Pattern = “*****ba*****ab", output : true Pattern = "baaa?ab", output : true Pattern = "ba*a?", output : true Pattern = "a*ab", output : false Each occurrence of ‘?’ character in wildcard pattern can be replaced with any other character and each occurrence of ‘*’ with a sequence of characters such that the wildcard pattern becomes identical to the input string after replacement. Let’s consider any character in the pattern. Case 1: The character is ‘*’ Here two cases arise We can ignore ‘*’ character and move to next character in the Pattern. ‘*’ cha...
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