Project Euler：Problem 52 Permuted multiples

标签：c++   project euler   

It can be seen that the number, 125874, and its double, 251748, contain exactly the same digits, but in a different order.

Find the smallest positive integer, x, such that 2x, 3x, 4x, 5x, and 6x, contain the same digits.

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

map<int, int> cd(int n)
{
	map<int, int>mp;
	while (n)
	{
		mp[n%10]++;
		n /= 10;
	}
	return mp;
}

bool ok(int n)
{
	int num = n;
	if (cd(n) == cd(2 * n))
	{
		if (cd(n) == cd(3 * n))
		{
			if (cd(n) == cd(4 * n))
			{
				if (cd(n) == cd(5 * n))
				{
					if (cd(n) == cd(6 * n))
						return true;
				}
			}
		}
	}
	return false;
}

int main()
{
	for (int i = 1; i < 1000000; i++)
	{
		if (ok(i))
		{
			cout << i << endl;
			break;
		}
	}
	system("pause");
	return 0;
}

Project Euler：Problem 52 Permuted multiples

标签：c++   project euler   

原文地址：http://blog.csdn.net/youb11/article/details/46714283