C :

#include <stdio.h>
int main()
{
	int x,i=0,sum=0,n=0;
	scanf ("%d  %d",&x,&n);
	sum=n;
	for (i=0;i<n;i++,x++)
	{
	 if (x%6==0)
	 {
	 	sum--;
	 	
	 }
	 if (x%7==0)
	 {
	    x=0;
	    sum--;
     }
	} 
	printf("%d\n",sum*250);
	 return 0;
}

C++ :

#include <bits/stdc++.h>
using namespace std;

int main(){
	long long x,n,r = 0,i;
	cin>>x>>n;
	for(i = x;i <= x + n - 1;i++){
		if(i % 7 != 6 && i % 7 != 0){
			r = r + 250;
		}
	}
	cout<<r<<endl;
}

Java :

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		int[] a=new int[8]; 
		for(int q=0;q<7;q++) {
			a[q]=0;
		}
		Scanner sc = new Scanner(System.in);
		int x=sc.nextInt(),n=sc.nextInt();
		int count=0,sum=0;
		for(int b=x;b<=8;b++) {
			
			if(b==8) {
				b=0;
				continue;
			}
			count++;
			if(b!=6&&b!=7) {
			a[b]=a[b]+250;
			}
			
			if(count==n) {
				
				break;
			}
			

		}
		for(int q=1;q<=5;q++) {
			sum=sum+a[q];
		}
		System.out.print(sum);
		
	}

}

Python :

import math
import sys
x,y=list(map(int,input().split()))
s=0
ii=x
for i in range(x,x+y):
    if ii==6 or ii==7:
        pass
    else:
        s=s+250
    ii=ii+1
    if ii>7:
        ii=1
print(s)