Jak zainicjować tablicę 2D w Javie?
int[][] a = {
{1, 2, 3},
{4, 5, 6, 9},
{7},
};
SAMER SAEID
int[][] a = {
{1, 2, 3},
{4, 5, 6, 9},
{7},
};const testMatrix = [
[1, 1, 1, 0, 0],
[1, 1, 1, 0, 1],
[0, 1, 0, 0, 1],
[0, 0, 0, 1, 1]
];
const directions = [
[-1, 0], //up
[0, 1], //right
[1, 0], //down
[0, -1] //left
]
const numberOfIslands = function(matrix) {
if(matrix.length === 0) return 0;
let islandCount = 0;
for(let row = 0; row < matrix.length; row++) {
for(let col = 0; col < matrix[0].length; col++) {
if(matrix[row][col] === 1) {
islandCount++;
matrix[row][col] = 0;
const queue = [];
queue.push([row, col]);
while(queue.length) {
const currentPos = queue.shift();
const currentRow = currentPos[0];
const currentCol = currentPos[1];
for(let i = 0; i < directions.length; i++) {
const currentDir = directions[i];
const nextRow = currentRow + currentDir[0];
const nextCol = currentCol + currentDir[1];
if(nextRow < 0 || nextRow >= matrix.length || nextCol < 0 || nextCol >= matrix[0].length) continue;
if(matrix[nextRow][nextCol] === 1) {
queue.push([nextRow, nextCol]);
matrix[nextRow][nextCol] = 0;
}
}
}
}
}
}
return islandCount;
}