//The sum of the squares of the first ten natural numbers is,
//12 + 22 + ... + 102 = 385
//The square of the sum of the first ten natural numbers is,
//(1 + 2 + ... + 10)2 = 552 = 3025
//Hence the difference between the sum of the squares of the first ten natural numbers and the square of the sum is 3025 − 385 = 2640.
//Find the difference between the sum of the squares of the first one hundred natural numbers and the square of the sum.
static void Main(string[] args)
{
int num1 = 0;
int num2 = 0;
int num3 = 0;
int num4 = 0;
for (int i = 1; i < 101; i++)
{
num1 += i * i;
num2 += i;
}
num3 = num2 * num2;
num4 = num3 - num1;
Console.WriteLine(num1);
Console.WriteLine(num3);
Console.WriteLine(num4);
}
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