ProjectEuler 009题

题目：

A Pythagorean triplet is a set of three natural numbers, a b c, for which,

a² + b² = c²

For example, 3² + 4² = 9 + 16 = 25 = 5².

There exists exactly one Pythagorean triplet for which a + b + c = 1000.
Find the product abc.

代码：

 1 #include<iostream>
 2 using namespace std;
 3
 4 int main() {
 5
 6     for(int i = 1; i < 333; i++){
 7         for(int j = 1; j <= 999; j++)
 8             for(int k = 1; k <= 999; k++){
 9                 if((i*i + j*j) == (k*k) && (i+j+k) == 1000)
10                     cout << i << " " << j << " " << k << endl;
11             }
12     }
13
14     system("pause");
15     return 0;
16 }