#include <iostream>
#include <string>
#include <unordered_map>
#include <vector>
// 7H15 M3554G3 is written in leet speak, where numbers resemble letters.
// place each leetspeak character with its matching letter
// (7 -> T, 1 -> I, 5 -> S, 3 -> E) and build a new string
// 7H15 -> THIS | M3554G3 -> MESSAGE
// Your brain can interpret distorted or number‑substituted letters
// surprisingly well because it recognizes the overall word
// shapes and patterns, not just individual characters.
// ------------------------------------------------------------
// Convert a single leet character into a normal alphabet letter
// ------------------------------------------------------------
char decodeChar(char c) {
static std::unordered_map<char, char> table = {
{'7', 'T'},
{'1', 'I'},
{'5', 'S'},
{'3', 'E'},
{'4', 'A'},
{'0', 'O'}
};
if (table.count(c))
return table[c];
return c; // keep letters like H, M, G, etc.
}
// ------------------------------------------------------------
// Convert an entire string from leet speak to normal text
// ------------------------------------------------------------
std::string decodeLeet(const std::string& s) {
std::string out;
out.reserve(s.size());
for (char c : s)
out.push_back(decodeChar(c));
return out;
}
int main() {
// Test lines provided by the user
std::vector<std::string> lines = {
"7H15 M3554G3",
"53RV35 7O PR0V3",
"H0W 0UR M1ND5 C4N",
"D0 4M4Z1NG 7H1NG5!",
"1MPR3551V3 7H1NG5!",
"1N 7H3 B3G1NN1NG",
"17 WA5 H4RD BU7",
"N0W, Y0UR M1ND 1S",
"R34D1NG 17",
"4U70M471C4LLY."
};
// Decode and print each line
for (const auto& line : lines)
std::cout << decodeLeet(line) << std::endl;
}
/*
run:
THIS MESSAGE
SERVES TO PROVE
HOW OUR MINDS CAN
DO AMAZING THINGS!
IMPRESSIVE THINGS!
IN THE BEGINNING
IT WAS HARD BUT
NOW, YOUR MIND IS
READING IT
AUTOMATICALLY.
*/
