Minimum Number of Moves to Seat Everyone
Problem Statement - link #
There are n seats and n students in a room. You are given an array seats of length n, where seats[i] is the position of the ith seat. You are also given the array students of length n, where students[j] is the position of the jth student.
You may perform the following move any number of times:
- Increase or decrease the position of the
ithstudent by1(i.e., moving the ith student from positionxtox + 1orx - 1) Return the minimum number of moves required to move each student to a seat such that no two students are in the same seat.
Note that there may be multiple seats or students in the same position at the beginning.
Examples #
Example 1:
Input: seats = [3,1,5], students = [2,7,4]
Output: 4
Explanation: The students are moved as follows:
- The first student is moved from from position 2 to position 1 using 1 move.
- The second student is moved from from position 7 to position 5 using 2 moves.
- The third student is moved from from position 4 to position 3 using 1 move.
In total, 1 + 2 + 1 = 4 moves were used.
Example 2:
Input: seats = [2,2,6,6], students = [1,3,2,6]
Output: 4
Explanation: The students are moved as follows:
- The first student is moved from from position 1 to position 2 using 1 move.
- The second student is moved from from position 3 to position 6 using 3 moves.
- The third student is not moved.
- The fourth student is not moved.
In total, 1 + 3 + 0 + 0 = 4 moves were used.
Example 3:
Input: seats = [4,1,5,9], students = [1,3,2,6]
Output: 7
Explanation: The students are moved as follows:
- The first student is not moved.
- The second student is moved from from position 3 to position 4 using 1 move.
- The third student is moved from from position 2 to position 5 using 3 moves.
- The fourth student is moved from from position 6 to position 9 using 3 moves.
In total, 0 + 1 + 3 + 3 = 7 moves were used.
Constraints #
n == seats.length == students.length1 <= n <= 1001 <= seats[i], students[j] <= 100
Solutions #
class Solution {
public:
int minMovesToSeat(vector<int>& seats, vector<int>& students) {
sort(seats.begin(), seats.end());
sort(students.begin(), students.end());
int res = 0;
for(int i=0; i<seats.size(); i++)
res += abs(seats[i]-students[i]);
return res;
}
};