public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int M = sc.nextInt();
int N = sc.nextInt();
int a[][] = new int[M + 1][N + 1];
int dp[][] = new int[M + 1][N + 1];
for (int i = 1; i <= M; i++) {
for (int j = 1; j <= N; j++) {
a[i][j] = sc.nextInt();
if (a[i][j] == 0) a[i][j] = -9999999;
}
}
for (int i = 1; i <= M; i++) {
for (int j = 1; j <= N; j++) {
dp[i][j] = dp[i - 1][j] + dp[i][j - 1] - dp[i - 1][j - 1] + a[i][j];
}
}
int max = -100000000;
for (int i = 1; i <= M; i++) {
for (int j = 1; j <= N; j++) {
for (int k = 1; k <= M; k++) {
if (i + k > M) break;
else if (j + k > N) break;
int temp = dp[i + k][j + k] - dp[i - 1][j + k] - dp[i + k][j - 1] + dp[i - 1][j - 1];
max = Math.max(max, temp);
}
}
}
System.out.println(max);
}
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("Length of logs array:");
int length = scanner.nextInt();
System.out.print("The array:");
int[] logs = new int[length];
for (int i = 0; i < length; i++) {
logs[i] = scanner.nextInt();
}
cut(logs);
}
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner in = new Scanner(System.in);
Hashtable numbers = new Hashtable();
N = in.nextInt();
K = in.nextLong();
long[] arr = new long[N];
for (int i = 0; i < N; i++) {
arr[i] = in.nextLong();
numbers.put(Long.toString(arr[i]), arr[i]);
}
result = 0;
for (int i = 0; i < N; i++) {
long tmp = 0, tmp2 = 0;
tmp = arr[i] + K;
try {
tmp2 = (Long) numbers.get(Long.toString(tmp));
result++;
} catch (Exception ex) {
}
}
System.out.println(result);
}
public void solve() {
Scanner s = new Scanner(System.in);
while (s.hasNext()) {
int n = s.nextInt();
System.out.println(ci(n + 1));
}
}
public static void main(String[] args) throws IOException {
Scanner scanner = new Scanner(new BufferedInputStream(System.in));
int num[][] = {
{0, 2, 3, 5, 6, 7, 8, 9},
{2, 3, 4, 5, 6, 8, 9},
{0, 2, 3, 5, 6, 8, 9},
{0, 4, 5, 6, 8, 9},
{0, 1, 2, 3, 4, 7, 8, 9},
{0, 2, 6, 8},
{0, 1, 3, 4, 5, 6, 7, 8, 9}
};
while (scanner.hasNextInt()) {
int a = scanner.nextInt();
String b = scanner.next();
if (a == 0) break;
String data[][] = new String[5 + (a - 1) * 2][(3 + (a - 1)) * b.length()];
for (int i = 0; i < 5 + (a - 1) * 2; i++)
for (int j = 0; j < (3 + (a - 1)) * b.length(); j++) data[i][j] = " ";
for (int i = 0; i < b.length(); i++) {
for (int j = 0; j < 3; j++) {
for (int k = 0; k < num[j].length; k++) {
if ((int) b.charAt(i) - 48 == num[j][k]) {
for (int h = 0; h < a; h++) data[(a + 1) * j][1 + i * (a + 2) + h] = "-";
}
}
}
for (int j = 3; j < 5; j++) {
for (int k = 0; k < num[j].length; k++) {
if ((int) b.charAt(i) - 48 == num[j][k]) {
for (int h = 0; h < a; h++) data[1 + h][(j - 3) * (a + 1) + (i * (a + 2))] = "|";
}
}
}
for (int j = 5; j < 7; j++) {
for (int k = 0; k < num[j].length; k++) {
if ((int) b.charAt(i) - 48 == num[j][k]) {
for (int h = 0; h < a; h++) data[a + 2 + h][(j - 5) * (a + 1) + (i * (a + 2))] = "|";
}
}
}
}
StringBuffer sb = new StringBuffer("");
for (int i = 0; i < 5 + (a - 1) * 2; i++) {
for (int j = 0; j < (3 + (a - 1)) * b.length(); j++) {
if ((j - (a + 1)) % (a + 2) == 0 && (j + 1) != (3 + (a - 1)) * b.length())
sb.append(data[i][j] + " ");
else sb.append(data[i][j]);
}
sb.append("\n");
}
System.out.println(sb);
}
}
public static void main(String arg[])
{
Scanner d=new Scanner(System.in);
int n=d.nextInt();
int count=0;
int arr[]=new int[n+1];
for(int i=0;i<n;i++)
arr[i]=d.nextInt();
for(int i=0;i<n-1;i++)
{
for(int j=i+1;j<n;j++)
{
if(a[i)>a[j])
count++;
}
}
if(count>0)
System.out.println("Values not sorted");
else
System.out.println("Sorted");
}
public static void main(String args[]) {
int T;
String s;
Scanner in = new Scanner(System.in);
T = in.nextInt();
for (int i = 0; i < T; i++) {
s = in.next();
// toReverse(s);
reverse(s);
System.out.println();
}
}
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
String line = System.getProperty("line.separator");
scan.useDelimiter(line);
int cases = scan.nextInt();
for (int x = 0; x < cases; x++) {
String[] get = scan.next().split(" ");
System.out.println(Integer.parseInt(get[0]) % Integer.parseInt(get[1]));
}
}
public static void main(String[] args) throws IOException {
Scanner scanner = new Scanner(new BufferedInputStream(System.in));
while (scanner.hasNextInt()) {
int a = scanner.nextInt();
if (a == 0) break;
while (a / 10 != 0) {
int sum = 0;
while (a / 10 != 0) {
sum = sum + a % 10;
a = a / 10;
}
a = a + sum;
}
System.out.println(a);
}
}
public static void main(String[] args) throws IOException {
Scanner scanner = new Scanner(new BufferedInputStream(System.in));
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
int n = 1;
while (scanner.hasNextInt()) {
int a = scanner.nextInt();
int b = scanner.nextInt();
if (a == 0) break;
BigInteger sum = BigInteger.ZERO;
BigInteger bb = BigInteger.valueOf(b);
for (int i = 0; i < a; i++) sum = sum.add(scanner.nextBigInteger());
System.out.println(
"Bill #" + n + " costs " + sum + ": each friend should pay " + sum.divide(bb) + "\n");
n++;
}
}
public static void main(String[] args) throws IOException {
Scanner scanner = new Scanner(new BufferedInputStream(System.in));
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
int num;
while ((num = scanner.nextInt()) != 0) {
ArrayList<String> all = new ArrayList<String>();
for (int i = 0; i < num; i++) {
all.add(scanner.next());
}
Collections.sort(all, comptr);
StringBuilder sb = new StringBuilder("");
for (String s : all) {
sb.append(s);
}
System.out.println(sb);
}
}
public static void main(String[] args) throws IOException {
Scanner scanner = new Scanner(new BufferedInputStream(System.in));
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
while (scanner.hasNextInt()) {
int n = scanner.nextInt();
int k = scanner.nextInt();
BigInteger sum = BigInteger.ONE;
for (int i = n; i > n - k; i--) {
sum = sum.multiply(BigInteger.valueOf(i));
}
for (int i = 2; i <= k; i++) {
sum = sum.divide(BigInteger.valueOf(i));
}
System.out.println(sum.toString().length());
}
}
public static void main(String[] args) throws java.lang.Exception {
Scanner cin = new Scanner(System.in);
while (cin.hasNext()) {
int input = cin.nextInt();
for (int a = 0; a < input + 1; a++) {
if (a > 0) {
String number = cin.nextLine();
String[] numberArray = number.split(" ");
int max = 0;
for (int b = 0; b < numberArray.length; b++) {
if (Integer.valueOf(numberArray[b]) > max) {
max = Integer.valueOf(numberArray[b]);
}
}
System.out.println("Case " + a + ": " + max);
} else {
String data = cin.nextLine();
}
}
}
}
public static void main(String[] args) {
//// I shall master R programming
Scanner s = new Scanner(System.in);
System.out.println("Enter no of transactions");
int p = s.nextInt();
String[] data = new String[p + 1];
int arr[] = new int[10];
for (int i = 0; i <= 9; i++) {
arr[i] = 0;
}
// s.delimiter();
for (int i = 1; i <= p; i++) {
String gh;
gh = s.nextLine();
data[i] = gh;
char[] buff = new char[10];
buff = gh.toCharArray();
for (int j = 0; j < buff.length; j++) {
int fg = (int) buff[j] - 48;
arr[fg]++;
}
}
System.out.println("Enter Min_support");
int minsup = s.nextInt();
for (int j = 1; j <= 9; j++) {
if (arr[j] < minsup) {
arr[j] = -1;
}
}
for (int j = 1; j <= p; j++) {
char[] buff = new char[10];
buff = data[j].toCharArray();
String fin = "";
for (int h = 0; h < buff.length; h++) {
int fg = ((int) buff[h]) - 48;
if (arr[fg] != -1) {
fin += buff[h];
}
}
data[j] = fin;
data[j] = sort(data[j], arr);
}
/////////// BAsic Stuff done////////////////////////////////////
///// FP TREE CONSTRUCTION
trie tr = new trie();
for (int j = 1; j <= p; j++) {
tr.insert(data[j]);
}
tr.show(minsup);
//// FP TREE Construction Done\\\\\\
//// Now FP TREE Itemset Generation\\\\
// trie x=new trie();
int max = 5;
int[] mark = new int[max + 1];
int[] yoyo = new int[max + 1];
for (int i = 0; i <= max; i++) {
yoyo[i] = i + 1;
mark[i] = 0;
}
int end = (int) Math.pow(2, max);
for (int i = 1; i < end; i++) {
mark = bringme(i, max);
String up = "", down = "";
for (int j = 0; j < max; j++) {
if (mark[j] == 1) down += yoyo[j];
}
makeCondFP(tr, down, data, p, minsup);
}
}
/**
* Evaluates a mathematical expression and returns the result
*
* @param expression String
* @return boolean
*/
public int parse(String expression) throws NoSuchElementException {
Scanner scan = new Scanner(expression);
Stack<Integer> stack1 = new Stack<Integer>();
int num1;
int num2;
while (scan.hasNext()) {
try {
if (scan.hasNextInt()) {
int num = scan.nextInt();
stack1.push(num);
// System.out.println("push "+ num);
} else {
// String str = scan.nextChar();
// System.out.println("scan "+ scan.next());
String str = scan.next();
if (str.equals("+")) {
num1 = stack1.pop();
// System.out.println("num1 = "+ num1);
num2 = stack1.pop();
// System.out.println("num1 = "+ num2);
stack1.push(num1 + num2);
}
if (str.equals("-")) {
num1 = stack1.pop();
num2 = stack1.pop();
stack1.push(num2 - num1);
}
if (str.equals("/")) {
num1 = stack1.pop();
num2 = stack1.pop();
stack1.push(num2 / num1);
}
if (str.equals("*")) {
num1 = stack1.pop();
num2 = stack1.pop();
stack1.push(num1 * num2);
}
if (str.equals("%")) {
num1 = stack1.pop();
num2 = stack1.pop();
stack1.push(num2 % num1);
}
if (str.equals("&")) {
num1 = stack1.pop();
num2 = stack1.pop();
stack1.push(num1 & num2);
}
if (str.equals("^")) {
num1 = stack1.pop();
num2 = stack1.pop();
stack1.push(num1 ^ num2);
}
if (str.equals("|")) {
num1 = stack1.pop();
num2 = stack1.pop();
stack1.push(num1 | num2);
}
if (str.equals("~")) {
num1 = stack1.pop();
stack1.push(~num1);
}
}
} catch (NoSuchElementException e) {
System.out.println("empty stacfgdgdfgk");
}
}
// int result = stack1.pop();
// System.out.println(result);
return stack1.pop();
}