032.cpp File Reference

Find the sum of all numbers that can be written as pandigital products. More...

#include <set>
#include "032_perm032.h"
#include "032_times_minus.h"

Go to the source code of this file.

Functions
unsigned	sum (set< int > &numbers)
int	main ()

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Detailed Description

Find the sum of all numbers that can be written as pandigital products.

We shall say that an n-digit number is pandigital if it makes use of all the digits 1 to n exactly once; for example, the 5-digit number, 15234, is 1 through 5 pandigital.

The product 7254 is unusual, as the identity, 39 x 186 = 7254, containing multiplicand, multiplier, and product is 1 through 9 pandigital.

Find the sum of all products whose multiplicand/multiplier/product identity can be written as a 1 through 9 pandigital.** HINT: Some products can be obtained in more than one way so be sure to only include it once in your sum.

Definition in file 032.cpp.