 Why Add natural no. solution is not being accepted ?

Hey, i tried the math formula as well as for loop but when i submit it shows wrong answer can someone help me with this ? CODE:

import java.util.Scanner;

public class Main {

public static void main(String[] args) {
int n = input.nextInt();
int sum = (n*(n+1))/2;
System.out.println(sum);
}

}

Try this : declare sum variable as long (instead of int) because integer overflow may occur while multiplying n with (n+1)

Can you share the link to the problem ?

Nope. Tried that also not working not taking submission says wrong answer. same issue with sum is everywhere. Triangle with angle.
https://www.codechef.com/viewsolution/54591123

int a,b,c;
cin>>a>>b>>c;
if(a+b+c==180 && (a!=0 && b!=0 && c!=0)){
cout<<"YES";
}
else cout<<"NO";

Sum is Everywhere question (Contest Page | CodeChef ), you are using wrong formula in your code. (see below code in C++)

long long int n ; cin>>n;
long long int odd= n*n;
long long int even = n*(n+1);

cout<<odd<<" "<<even<<endl;

And whenever you post the doubt, share the problem link as well 1 Like

Hey it worked the problem indeed was of data type as you said before but i was taking only the result variable in long. All three of the questions had the same issue.

Thank you. P.S. New to this platform did not know how to share links. Will keep it in mind.

1 Like