C :

#include<stdio.h>
main()
{
	int a,b,c;
	scanf("%d",&a);
	if(a>10)
	{   b=375/120;
	    printf("%d",b+1);
    }
	else if(a>7)
	{  c=225/120;
	   printf("%d",c+1);
    }
	else if (a>3)
	printf("%d",120/75);
}

C++ :

#include <iostream>
using namespace std;

int main(){
	int n,m,p;
	cin>>n;
	if(n >= 10){
		m = 25 * 3 * 5;	
	}else if(n >= 7){
		m = 15 * 3 * 5;
	}else if(n >= 3){
		m = 5 * 3 * 5;	
	}
	if(m % 120 == 0){
		p = m / 120;
	}else{
		p = m / 120 + 1;
	}
	cout<<p<<endl;
	return 0;
}

Python :

n=int(input())
if 3<= n <=6:
    s=5*3*5
elif 7<= n <=10:
    s=15*3*5
elif n > 10 :
    s=25*3*5

if s % 120==0 :
    print(s//120)
else:
        print(s//120+1)