| # | Title | Solutions | Video | Difficulty | Tag

|------|----------------|------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------|-------------|-------------

| 2319|[Check if Matrix Is X-Matrix](https://leetcode.com/problems/check-if-matrix-is-x-matrix/)|[Java](../master/src/main/java/com/fishercoder/solutions/_2319.java)|| Easy||

| 2315|[Count Asterisks](https://leetcode.com/problems/count-asterisks/)|[Java](../master/src/main/java/com/fishercoder/solutions/_2315.java)|| Easy||

| 2309|[Greatest English Letter in Upper and Lower Case](https://leetcode.com/problems/greatest-english-letter-in-upper-and-lower-case/)|[Java](../master/src/main/java/com/fishercoder/solutions/_2309.java)|| Easy||

| 2303|[Calculate Amount Paid in Taxes](https://leetcode.com/problems/calculate-amount-paid-in-taxes/)|[Java](../master/src/main/java/com/fishercoder/solutions/_2303.java)|| Easy||

packagecom.fishercoder.solutions;

publicclass_2319 {

publicstaticclassSolution1 {

publicbooleancheckXMatrix(int[][]grid) {

intm =grid.length;

boolean[][]checked =newboolean[m][m];

for (inti =0;i <m;i++) {

if (grid[i][i] ==0) {

returnfalse;

}else {

checked[i][i] =true;

}

}

for (inti =0,j =m -1;i <m &&j >=0;i++,j--) {

if (grid[i][j] ==0) {

returnfalse;

}else {

checked[i][j] =true;

}

}

for (inti =0;i <m;i++) {

for (intj =0;j <m;j++) {

if (!checked[i][j] &&grid[i][j] !=0) {

returnfalse;

}

}

}

returntrue;

}

}

}