hdu1334-Perfect Cubes

http://acm.hdu.edu.cn/showproblem.php?pid=1334

题意;求200以内所有满足a^ 3 == b^ 3 + c ^ 3 +d ^ 3

#include<iostream>

#include<cstdio>

#include<cstring>

#include<cmath>

#include<algorithm>

#include<bitset>

#include<iomanip>

using namespace std;

int main()

{

	int a , b , c , d ;

	for( int a = 2 ; a <= 200 ; ++a )

		for( int b = 2 ; b <= a; ++ b )

			for( int c = b + 1 ; c <= a ; ++c )

				for( int d = c + 1 ; d <= a ;++d )

					if( a * a * a == b * b * b + c * c * c + d * d *d )

					{

						printf( "Cube = %d, Triple = (%d,%d,%d)\n" , a , b , c , d ) ;

					}

	return 0 ;

}

#include<iostream>

#include<cstdio>

#include<cstring>

#include<cmath>

#include<algorithm>

#include<bitset>

#include<iomanip>

using namespace std;

int main()

{

	int a , b , c , d ;

	int num[ 201 ] ;

	for( int i = 1 ; i <= 200 ; ++i )

	{

		num[ i ] = i * i * i ;

	}

	for( a = 6 ; a <= 200 ; ++a )

	{

		for( b = 2 ; b <= a ; ++b )

		{

			int x  =  num[ a ] - num[ b ] ;

			for( c = b + 1 ; c <= a ; ++c)

			{

				int y = x - num[ c ];

				for( d = c + 1 ; d <= a ; ++d )

				{

					if( num[ d ] == y )

						printf( "Cube = %d, Triple = (%d,%d,%d)\n" , a , b , c , d ) ;

				}

			}

		}

	}

	return 0 ;

}