[프로그래머스 Level 2] 2 x n 타일링

function solution(n) {
    const table = new Array(n-1);
    const modular = 1000000007;
 
    table[0] = 1;
    table[1] = 2;
 
    for(let i = 2; i <= n; i++){
        table[i] = (table[i-1] + table[i-2]) % modular;
    }
 
    return table[n-1]
}

function solution(n) {
    const modular = 1000000007;
 
    let a = 1;
    let b = 2;
    let temp;
 
    for (let i = 2; i < n; i++) {
        temp = (a + b) % modular;
        a = b;
        b = temp;
    }
 
    return b;
}