CanRotationAchieveArray.java

public class CanRotationAchieveArray {
    public static void main(String[] args) {
        //the problem asks if we can achieve the given array after rotating the original array any number of times
        int[][] a = {{0,0,0},{0,1,0},{1,1,1}};
        int[][] b = {{1,1,1},{0,1,0},{0,0,0}};
        System.out.println(findRotation(a,b));
    }
    public static boolean findRotation(int[][] a, int[][] b) {
        int n=a.length;
        int c90=0,c180=0,c270=0,c0=0;
        for(int i=0;i<n;i++)
        {
            for(int j=0;j<n;j++)
            {
                if(b[i][j]==a[n-j-1][i])
                    c90++;
                if(b[i][j]==a[n-i-1][n-j-1])
                    c180++;
                if(b[i][j]==a[j][n-i-1])
                    c270++;
                if(b[i][j]==a[i][j])
                    c0++;
            }
        }
        if(c90==n*n||c270==n*n||c180==n*n||c0==n*n) {
            return true;
        }
        else {
            return false;
        }

    }
}