Solution.ts

function canFormArray(arr: number[], pieces: number[][]): boolean {
    const n = arr.length;
    let i = 0;
    while (i < n) {
        const target = arr[i];
        const items = pieces.find(v => v[0] === target);
        if (items == null) {
            return false;
        }
        for (const item of items) {
            if (item !== arr[i]) {
                return false;
            }
            i++;
        }
    }
    return true;
}