C++ :

#include<bits/stdc++.h>
using namespace std;
int a[20]={80,50,60,80,120,60,55,30,20,40,85,100,90,35,70,65,80,150,200,100};
int main(){
	int n,res=0;
	cin>>n;
	for(int i=0;i<20;i++){
		if (a[i]<=n) res++;
	}
	cout<<res;
	return 0;
}

Python :

# coding=utf-8
a=[80,50,60,80,120,60,55,30,20,40,85,100,90,35,70,65,80,150,200,100]
x=int(input())
b=0
for i in a:
    if i<=x:
        b=b+1
print(b)