CodeChef OCT17 : Problem Code: PERFCONT
Problem:
Chef wants to organize a contest. Predicting difficulty levels of the
problems can be a daunting task. Chef wants his contests to be balanced
in terms of difficulty levels of the problems.
Assume a contest had total P participants. A problem that was solved
by at least half of the participants (i.e. P / 2 (integer division))
is said to be cakewalk difficulty. A problem solved by at max P / 10
(integer division) participants is categorized to be a hard
difficulty.
Chef wants the contest to be balanced. According to him, a balanced
contest must have exactly 1 cakewalk and exactly 2 hard problems. You
are given the description of N problems and the number of
participants solving those problems. Can you tell whether the contest
was balanced or not?
Input
The first line of the input contains an integer T denoting the
number of test cases.
The first line of each test case contains two space separated integers,
N, P denoting the number of problems, number of participants
respectively.
The second line contains N space separated integers, i-th of
which denotes number of participants solving the i-th problem.
Output⌗
For each test case, output “yes” or “no” (without quotes) denoting whether the contest is balanced or not.
Constraints
- 1 ≤ T, N ≤ 500
- 1 ≤ P ≤ 108
- 1 ≤ Number of participants solving a problem ≤ P
Subtasks
- Subtask #1 (40 points): P is a multiple of 10
- Subtask #2 (60 points): Original constraints
Example
Input
6
3 100
10 1 100
3 100
11 1 100
3 100
10 1 10
3 100
10 1 50
4 100
50 50 50 50
4 100
1 1 1 1
Output
yes
no
no
yes
no
no
Explanation
Example case 1.: The problems are of hard, hard and cakewalk
difficulty. There is 1 cakewalk and 2 hard problems, so the contest is
balanced.
Example case 2.: The second problem is hard and the third is
cakewalk. There is 1 cakewalk and 1 hard problem, so the contest is not
balanced.
Example case 3.: All the three problems are hard. So the contest is
not balanced.
Example case 4.: The problems are of hard, hard, cakewalk
difficulty. The contest is balanced.
Example case 5.: All the problems are cakewalk. The contest is not
balanced.
Example case 6.: All the problems are hard. The contest is not
balanced.
Solution:
#include <iostream>
using namespace std;
int main() {
int t;
cin>>t;
while(t--)
{
int n, p,temp;
cin>>n>>p;
int cake=0,hard=0;
while(n--)
{
cin>>temp;
if(temp >= p/2) cake++;
else if(temp<= p/10) hard++;
}
if(hard==2 and cake==1)
cout<<"yes"<<endl;
else cout<<"no"<<endl;
}
return 0;
}