Hi Coders,↵
↵
I recently solved the problem called "Permutations" on CSES Problem set. It is the [45th problem](https://cses.fi/problemset/task/1070/) in the list.↵
↵
I started by writing the solution in Java, because I'm more proficient in Java. Here is the solution that I have written. For some reasons, my Java solution failed some test with **TLE(Time Limit Exceeded)** for the following inputs : **11542**, **1000000**, **906819**, **898673**, **719525**, etc.↵
↵
~~~~~↵
import java.util.Scanner;↵
↵
public class Permutations {↵
public static void main(String[] args) {↵
Scanner sc = new Scanner(System.in);↵
int n = sc.nextInt();↵
↵
if (n == 1) {↵
System.out.println("1");↵
} else if (n < 4) {↵
System.out.println("NO SOLUTION");↵
} else if (n == 4) {↵
System.out.println("2 4 1 3");↵
} else {↵
for (int i = 1; i <= n; i += 2) {↵
System.out.print(i + " ");↵
}↵
for (int i = 2; i <= n; i += 2) {↵
System.out.print(i);↵
if (i + 2 <= n) {↵
System.out.print(" ");↵
} else {↵
System.out.println();↵
}↵
}↵
}↵
}↵
}↵
~~~~~↵
↵
Now, because I'm learning C++ to become really good at Competitive programming, I wrtethe following code in C++ to address the same problem. Here is my C++ code:↵
↵
~~~~~↵
#include <iostream>↵
↵
using namespace std;↵
↵
int main() {↵
int n;↵
cin >> n;↵
↵
if (n == 1) {↵
cout << 1 << endl;↵
} else if (n < 4) {↵
cout << "NO SOLUTION" << endl;↵
} else if (n == 4) { ↵
cout << "2 4 1 3" << "\n";↵
} else {↵
for (int i = 1; i <= n; i += 2) {↵
cout << i << " ";↵
}↵
for (int i = 2; i <= n; i += 2) {↵
cout << i;↵
if (i + 2 <= n) {↵
cout << " ";↵
} else {↵
cout << endl;↵
}↵
}↵
}↵
}↵
~~~~~↵
↵
At my surprise, all the tests passed with C++ code. Now I would like to understand the main reason behind why almost the same code passed all the tests in C++ and not in Java. I thought may I should have use the type long in Java, but I did not need that in C++.↵
↵
Is there something that I need to understand? Please your advice is welcome to make me understand what happened.↵
↵
↵
↵
I recently solved the problem called "Permutations" on CSES Problem set. It is the [
↵
I started by writing the solution in Java, because I'm more proficient in Java. Here is the solution that I have written. For some reasons, my Java solution failed some test with **TLE(Time Limit Exceeded)** for the following inputs : **11542**, **1000000**, **906819**, **898673**, **719525**, etc.↵
↵
~~~~~↵
import java.util.Scanner;↵
↵
public class Permutations {↵
public static void main(String[] args) {↵
Scanner sc = new Scanner(System.in);↵
int n = sc.nextInt();↵
↵
if (n == 1) {↵
System.out.println("1");↵
} else if (n < 4) {↵
System.out.println("NO SOLUTION");↵
} else if (n == 4) {↵
System.out.println("2 4 1 3");↵
} else {↵
for (int i = 1; i <= n; i += 2) {↵
System.out.print(i + " ");↵
}↵
for (int i = 2; i <= n; i += 2) {↵
System.out.print(i);↵
if (i + 2 <= n) {↵
System.out.print(" ");↵
} else {↵
System.out.println();↵
}↵
}↵
}↵
}↵
}↵
~~~~~↵
↵
Now, because I'm learning C++ to become really good at Competitive programming, I wrtethe following code in C++ to address the same problem. Here is my C++ code:↵
↵
~~~~~↵
#include <iostream>↵
↵
using namespace std;↵
↵
int main() {↵
int n;↵
cin >> n;↵
↵
if (n == 1) {↵
cout << 1 << endl;↵
} else if (n < 4) {↵
cout << "NO SOLUTION" << endl;↵
} else if (n == 4) { ↵
cout << "2 4 1 3" << "\n";↵
} else {↵
for (int i = 1; i <= n; i += 2) {↵
cout << i << " ";↵
}↵
for (int i = 2; i <= n; i += 2) {↵
cout << i;↵
if (i + 2 <= n) {↵
cout << " ";↵
} else {↵
cout << endl;↵
}↵
}↵
}↵
}↵
~~~~~↵
↵
At my surprise, all the tests passed with C++ code. Now I would like to understand the main reason behind why almost the same code passed all the tests in C++ and not in Java. I thought may I should have use the type long in Java, but I did not need that in C++.↵
↵
Is there something that I need to understand? Please your advice is welcome to make me understand what happened.↵
↵
↵
