1476 - Subrectangle Queries\.

Medium

Implement the class SubrectangleQueries which receives a rows x cols rectangle as a matrix of integers in the constructor and supports two methods:

• updateSubrectangle(int row1, int col1, int row2, int col2, int newValue)

• Updates all values with newValue in the subrectangle whose upper left coordinate is (row1,col1) and bottom right coordinate is (row2,col2).

• getValue(int row, int col)

• Returns the current value of the coordinate (row,col) from the rectangle.

Example 1:

Input "SubrectangleQueries","getValue","updateSubrectangle","getValue","getValue","updateSubrectangle","getValue","getValue" [[[1,2,1,4,3,4,3,2,1,1,1,1]],0,2,0,0,3,2,5,0,2,3,1,3,0,3,2,10,3,1,0,2]

Output: null,1,null,5,5,null,10,5

Explanation: SubrectangleQueries subrectangleQueries = new SubrectangleQueries([1,2,1,4,3,4,3,2,1,1,1,1]); // The initial rectangle (4x3) looks like: // 1 2 1 // 4 3 4 // 3 2 1 // 1 1 1 subrectangleQueries.getValue(0, 2); // return 1 subrectangleQueries.updateSubrectangle(0, 0, 3, 2, 5); // After this update the rectangle looks like: // 5 5 5 // 5 5 5 // 5 5 5 // 5 5 5 subrectangleQueries.getValue(0, 2); // return 5 subrectangleQueries.getValue(3, 1); // return 5 subrectangleQueries.updateSubrectangle(3, 0, 3, 2, 10); // After this update the rectangle looks like: // 5 5 5 // 5 5 5 // 5 5 5 // 10 10 10 subrectangleQueries.getValue(3, 1); // return 10 subrectangleQueries.getValue(0, 2); // return 5

Example 2:

Input "SubrectangleQueries","getValue","updateSubrectangle","getValue","getValue","updateSubrectangle","getValue" [[[1,1,1,2,2,2,3,3,3]],0,0,0,0,2,2,100,0,0,2,2,1,1,2,2,20,2,2]

Output: null,1,null,100,100,null,20

Explanation: SubrectangleQueries subrectangleQueries = new SubrectangleQueries([1,1,1,2,2,2,3,3,3]); subrectangleQueries.getValue(0, 0); // return 1 subrectangleQueries.updateSubrectangle(0, 0, 2, 2, 100); subrectangleQueries.getValue(0, 0); // return 100 subrectangleQueries.getValue(2, 2); // return 100 subrectangleQueries.updateSubrectangle(1, 1, 2, 2, 20); subrectangleQueries.getValue(2, 2); // return 20

Constraints:

• There will be at most 500 operations considering both methods: updateSubrectangle and getValue.

• 1 <= rows, cols <= 100

• rows == rectangle.length

• cols == rectangle[i].length

• 0 <= row1 <= row2 < rows

• 0 <= col1 <= col2 < cols

• 1 <= newValue, rectangle[i][j] <= 10^9

• 0 <= row < rows

• 0 <= col < cols