#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <random>
// ------------------------------------------------------------
// Function: generateNumber
// Purpose: Create one 3-digit string with distinct digits,
// drawn from a shared pool. Leading zeros preserved.
// ------------------------------------------------------------
std::string generateNumber(std::vector<char>& availableDigits, int length = 3) {
static std::random_device rd;
static std::mt19937 gen(rd());
// Shuffle available digits
std::shuffle(availableDigits.begin(), availableDigits.end(), gen);
// Pick first 'length' digits
std::string chosen(availableDigits.begin(), availableDigits.begin() + length);
// Remove chosen digits from pool
for (char d : chosen) {
availableDigits.erase(std::remove(availableDigits.begin(), availableDigits.end(), d),
availableDigits.end());
}
return chosen; // keep as string to preserve leading zeros
}
// ------------------------------------------------------------
// Function: generateThreeDistinctDigitNumbers
// Purpose: Produce three 3-digit numbers with distinct digits
// and no digit repeated across all numbers.
// ------------------------------------------------------------
std::tuple<std::string, std::string, std::string> generateThreeDistinctDigitNumbers() {
std::vector<char> digits = {'0','1','2','3','4','5','6','7','8','9'};
std::string n1 = generateNumber(digits);
std::string n2 = generateNumber(digits);
std::string n3 = generateNumber(digits);
return {n1, n2, n3};
}
// ------------------------------------------------------------
// Main execution
// ------------------------------------------------------------
int main() {
// Run the generator 5 times
for (int i = 0; i < 5; ++i) {
auto [a, b, c] = generateThreeDistinctDigitNumbers();
std::cout << a << ", " << b << ", " << c << "\n";
}
}
/*
run:
491, 026, 753
729, 436, 105
614, 529, 830
137, 580, 469
250, 639, 814
*/
