g1401_1500.s1476_subrectangle_queries.SubrectangleQueries Maven / Gradle / Ivy

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package g1401_1500.s1476_subrectangle_queries;

// #Medium #Array #Matrix #Design #2022_04_04_Time_20_ms_(97.61%)_Space_44.6_MB_(95.87%)

/**
 * 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:
 *
 * 1. `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)`.
 *
 * 2. `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`
**/
public class SubrectangleQueries {
    private final int[][] rectangle;

    public SubrectangleQueries(int[][] rectangle) {
        this.rectangle = rectangle;
    }

    public void updateSubrectangle(int row1, int col1, int row2, int col2, int newValue) {
        for (int i = row1; i <= row2; i++) {
            for (int j = col1; j <= col2; j++) {
                rectangle[i][j] = newValue;
            }
        }
    }

    public int getValue(int row, int col) {
        return rectangle[row][col];
    }
}