Lasting Impression

Problem

Read an input string and print its last character.

26. Lasting impression, Comet 64

Solution 1

Characters in a string are indexed starting from 0. If n is the number of characters in a string, the last character has index n - 1. We read a string, determine the number of characters n, calculate the index

k := n - 1

of the last character, and print the last character.

str = input;       // Read the input string.
int = str.length;  // Number of characters in string.
int--;             // Index of the last character.
char = str[int];   // The last character.
output = char;     // Print the last character.

Solution 2

Similar to Solution 1. However, the index of the last character can be calculated in one instruction, instead of two. This solution is optimal, according to the game.

str = input;           // Read the input string.
int = str.length - 1;  // Index of the last character.
char = str[int];       // The last character.
output = char;         // Print the last character.