First Fit Room - Amazon Top Interview Questions

Problem Statement :

You are given a list of integers rooms and an integer target. Return the first integer in rooms that's target or larger. If there is no solution, return -1.


0 ≤ n ≤ 100,000 where n is the length of rooms

Example 1


rooms = [15, 10, 30, 50, 25]
target = 20




30 is the first room that's at least as large as 20.

Example 2


rooms = [15, 10, 30, 50, 25]
target = 51



There's no room that's at least 51.

Solution :


                        Solution in C++ :

int solve(vector<int>& rooms, int target) {
    auto it = find_if(rooms.begin(), rooms.end(), [&](int value) { return value >= target; });
    return it == rooms.end() ? -1 : *it;

                        Solution in Java :

import java.util.*;

class Solution {
    public int solve(int[] rooms, int target) {
        for (int r : rooms) {
            if (r >= target)
                return r;
        return -1;

                        Solution in Python : 
class Solution:
    def solve(self, rooms, target):
        return next((x for x in rooms if x >= target), -1)

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