C :

  #include<stdio.h>
void main()
{
int a,b,c,L;
int count=0;
scanf("%d",&L);
for(a=1;a<=L-2;a++)
{
    for(b=1;b<=L-a-1;b++)
    {
		c=L-a-b;
        if(a+b>c && a+c>b && b+c>a)
		{
			if(a==b && a==c)
				continue;
			else if(a==b || a==c || b==c)
				count=count+2;
			else
			count++;
			
		}
    }
}
count=count/6;
printf("%d\n",count);
}

C++ :

#include<iostream>
using namespace std;

int main(){
	
	int l;
	cin>>l;
	int i,j,k;
	int s;
	s=0; 
	
	
	for(i=1;i<=l/3;i++){
		for(j=i;j<=l/2;j++){
			k=l-i-j;
			if((k==j && j!=i) || k>j){
				if(i+j>k && i+k>j && j+k>i){
						s++;
				}
			
			}
		}
	} 
	
	cout<<s<<endl;
}

Pascal :

var i,j,k,l,t,m,n:longint;
begin
  readln(l);t:=0;
  m:=l div 3; n:=l div 2;
  for i:=1 to m do
   for j:=i to n do
      begin
        k:=l-i-j;
        if ((k=j) and (j<>i)) or (k>j) then
          if (i+j>k) and  (j+k>i) and (k+i>j)  then  inc(t);


     end;
   writeln(t);
end.

Java :

import java.util.*;
public class Main{
	public static void main(String args[]){
		Scanner sc = new Scanner(System.in);
		int L = sc.nextInt();
		int s = 0;
		for(int a = 2;a<L;a++){
			for(int b = 1;b<=a;b++){
				for(int c = 1;c<=b;c++){
					if(b+c>a&&a-c<b&&a+b+c==L){
						if(a==b&&b==c){}
						else{
							s++;
						}
					}
				}
			}
		}
		System.out.println(s);
		
	}
}

Python :

L=int(input())
count=0
for i in range(1,L-1):
    for j in range(i,L-i):
        k=L-i-j
        if (k>=j and i+j>k and i+k>j and j+k>i):
            if (i==j and i==k):
                continue
            else:
                count=count+1
print(count)