2017 JUST Programming Contest 3.0 K. Malek and Summer Semester

K. Malek and Summer Semester

time limit per test

1.0 s

memory limit per test

256 MB

input

standard input

output

standard output

Malek registered n courses for the summer semester. Malek has a success rate m,
which means he has to succeed at least in ceil(n × m)courses out of the n courses,
in order to consider the summer semester as a successful semester. Malek is considered successful in the ithcourse,
if his grade on this course was greater than or equal to 50.

ceil(x) is the smallest integer greater than or equal to x.
For example, ceil(0.95) = 1, ceil(4) = 4,
and ceil(7.001) = 8.

Malek will give you his grades in the n courses, and your task is to tell him whether the summer semester was a successful semester
or not.

Input

The first line contains an integer T (1 ≤ T ≤ 100),
where T is the number of test cases.

The first line of each test case contains an integer n and a real number m (1 ≤ n ≤ 100) (0 < m < 1),
where n is the number of courses, and m is
the required success rate.

The second line contains n integers a1, a2, ..., an (0 ≤ ai ≤ 100),
where ai is
the grade of the ith course.

The success rate m is given with exactly two digits after the decimal point.

Output

For each test case, print a single line containing "YES" (without quotes), if the summer semester was a successful semester for Malek. Otherwise, print "NO"
(without quotes).

Example

input

2
5 0.60
45 46 48 48 50
5 0.75
100 99 98 97 100

output

NO
YES

#include<iostream>
#include<cstdio>
#include<cmath>
using namespace std;
#define ll long long
const int maxn=100005;
int a[105];
int main()
{
//    freopen("in.txt","r",stdin);
    int T,n;
    double m;
    scanf("%d",&T);
    while(T--)
    {
        scanf("%d%lf",&n,&m);
        double guo=n*m;
        int guo1=ceil(guo);
        for(int i=0;i<n;i++)
            scanf("%d",&a[i]);
        int ans=0;
        for(int i=0;i<n;i++)
        {
            if(a[i]>=50)
                ans++;
        }
        if(ans>=guo1)
            cout<<"YES"<<endl;
        else
            cout<<"NO"<<endl;
    }
}