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main.js — NiceCode
// Calculating Fibonacci sequence with memoization
function fibonacci(n, memo = {}) {
if (n in memo) return memo[n];
if (n <= 2) return 1;
memo[n] = fibonacci(n - 1, memo) + fibonacci(n - 2, memo);
return memo[n];
}
// ✨ AI Suggestion: Add type checking for input 'n'
if (typeof n !== 'number' || n < 1) throw new Error('Invalid input');

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