C :

#include<stdio.h>

void main(){
    int a[11];
    int n,i,c=0,b=0;
    scanf("%d",&n);
    
    for(i=0;i<n;i++){
        scanf("%d",&a[i]);
    }
    
    for(i=0;i<n;i++){
        if(a[i]>=90){
            c++;
        }
        if(a[i]<60){
            b++;
        }
    }
    
    if(b==0){
        if(c>=5){
            printf("%d",1);
        }else if(c==3||c==4){
            printf("%d",2);
        }else if(c==2){
            printf("%d",3);
        }
    }else{
        printf("%s","no");
    }
}

C++ :

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

int main(){
	int a[1000],n,i,x = 0,d = 0;
	cin>>n;
	for(i = 0;i < n;i++){
		cin>>a[i];
		if(a[i] >= 90){
			x++;
		}else if(a[i] < 60){
			d++;
		}
	}
	
	if(d == 0){
		if(x == 5){
			cout<<1<<endl;
		}else if(x == 3|| x == 4){
			cout<<2<<endl;
		}else if(x == 2){
			cout<<3<<endl;
		}
	}else{
		cout<<"no"<<endl;
	}
}

Python :

n=int(input())
s1=list(map(int,input().split()))
alen=len([item for item in s1 if item<60])
blen=len([item for item in s1 if item>=90])

if alen>0:
    print("no")
else:
    if blen>=5:
        print("1")
    elif blen>=3:
        print("2")
    elif blen==2:
        print("3")
    else:
        pass