question
Find three ways to modify the code below to print exactly 20 '-' characters by changing or inserting one character.

int i, n = 20;
for (i = 0; i < n; i--)
{
   print("-");
}

For this question be sure to check out the hint before the answer!
Here are a few common incorrect solutions.

Changing "n = 20" to "n = -20" will not work
Changing "i--" to "i++" doesn't satisfy the one character condition
Changing "i = 0" to "i = 40" will not work
Changing "i < n" to "i < -n" will not work

Don't view the answer before you have three modifications!
Here are three solutions - if you come up with one not listed here, email me to add it!

First solution - change "i < n" to "-i < n":
int i, n = 20;
for (i = 0; -i < n; i--)
{
   print("-");
}

Second solution - Change "i < n" to "i + n":
int i, n = 20;
for (i = 0; i + n; i--)
{
   print("-");
}

Third solution - Change "i--" to "n--":
int i, n = 20;
for (i = 0; i < n; n--)
{
   print("-");
}