C :

#include<stdio.h>
void main()
{
	int x,a,b,i,j,c=0;
	scanf("%d%d%d",&x,&a,&b);
	for(i=1;i<x/a;i++){
		j=(x-i*a)/b;
		if((x-i*a)%b==0&&i*a+j*b==x){
			c++;
		}
		
	}
	printf("%d",c);
}

C++ :

#include<iostream>
using namespace std;
int main(){ 
   int x,a,b,i,f=0;
   cin>>x>>a>>b;
   for(i = 1;i <= x / a;i++)
   { 
      if((x - i * a >= b) && (x - i * a) % b == 0 ){
      	f++;
	  }
   }
   cout<<f<<endl;
   return 0;
}

Pascal :

var x,a,b,s,i:longint;
begin
  s:=0;
  read(x,a,b);
  for i:=1 to (x-b)div a do
   if ((x-i*a) mod b=0) then s:=s+1;
  write(s);
end.

Java :

import java.util.Scanner;

public class Main{
	public static void main(String[] args) {
		Scanner scanner=new Scanner(System.in);
		String str=scanner.nextLine();
		String[] array=str.split(" ");
		int x=Integer.valueOf(array[0]);
		int a=Integer.valueOf(array[1]);
		int b=Integer.valueOf(array[2]);
		int n=0;
		for(int i=1;i<=x;i++){
			for(int j=1;j<=x;j++){
				if(i*a+j*b==x){
					n++;
				}
			}
		}
		System.out.println(n);
	}
}

Python :

n = input().split()
x = int(n[0])
a = int(n[1])
b = int(n[2])
c = 0
for i in range(1, x // a + 1):
    for j in range(1, x // b + 1):
        if a * i + b * j == x:
            c += 1
print(c)