public static void main(String[] args){

}

public List<List<String>> solveNQueens(int n) {

int[][] chessport = new int[n][n];

List<List<String>> result = new ArrayList<>();

List<int[][]> tem = new ArrayList<>();

for(int[][] a : tem) {

for(int i = 0; i < n ; i++) {

StringBuffer stringBuffer = new StringBuffer();

for(int j = 0; j < n; j++) {

if(a[i][j] == 0) stringBuffer.append(".");

else if(a[i][j] == 1) stringBuffer.append("Q");

}

stringBuffer.toString();

}

}

return result;

}