Game Of Piles Version 1 Solution Codechef

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Game of Piles Version 1 Solution Codechef

There are N piles where the i^th pile consists of A_i stones.

Chef and Chefina are playing a game taking alternate turns with Chef starting first.
In his/her turn, a player can choose any non-empty pile and remove exactly 1 stone from it.

The game ends when exactly 1 pile becomes empty. The player who made the last move wins.
Determine the winner if both players play optimally.

Input Format

The first line of input will contain a single integer T, denoting the number of test cases.
Each test case consists of multiple lines of input.
- The first line of each test case contains a single integer NN denoting the number of piles.
- Next line contains NN space-separated integers A₁,A₂,…,A_N – denoting the number of stones in each pile.

Output Format

For each test case, output CHEF if Chef wins the game, otherwise output CHEFINA.

Note that the output is case-insensitive i.e. CHEF, Chef, cHeF, and chef are all considered the same.

Constraints

1≤T≤1000
1≤N≤10⁵
1≤A_i≤10⁹
Sum of N over all test cases does not exceed 2⋅10⁵.

Sample Input 1

Sample Output 1

CHEFINA
CHEFINA
CHEF

Explanation

Test Case 1: No matter which stone Chef removes, Chefina will remove the remaining stone from the same pile and make it empty.

Test Case 2: Since there is only 1 pile containing 10 stones, the game will last exactly 10 moves with last move made by Chefina.

Test Case 3: Chef can remove 1 stone from the first pile and thus make it empty.

SOLUTION

Program: Game of Piles Version 1 Solution in Python

for i in range(int(input())):
    n=int(input())
    l=list(map(int,input().split()))
    k=0
    ec=0
    oc=0
    for i in l:
        if(i==1):
            print("CHEF")
            k=1
            break
        elif(i%2==0):
            ec+=1
        else:
            oc+=1
    if(k==0):
        if(oc%2==0):
            print("CHEFINA")
        else:
            print("CHEF")

Program: Game of Piles Version 1 Solution in C++

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

int main() {
	int t;
	cin>>t;
	for(int i=0;i<t;i++){
		int n;
		cin>>n;
        int arr[n];
        int minm = 3;
        int sum = 0;
        for(int k=0;k<n;k++){
            cin>>arr[k];
            minm = min(arr[k], minm);
            sum += arr[k] - 2;
        }
        if(minm == 1){
            cout<<"CHEF"<<endl;
            continue;
        }
        else{
            if(sum%2 == 0) cout<<"CHEFINA"<<endl;
            else cout<<"CHEF"<<endl;
        }
	}
	return 0;
}

Program: Game of Piles Version 1 Solution in Java

import java.util.*;
import java.lang.*;
import java.io.*;

class Codechef
{
	public static void main (String[] args) throws java.lang.Exception
	{
		Scanner sc=new Scanner(System.in);
		int t=sc.nextInt();
		while(t-->0){
		    int n=sc.nextInt();
		    int a[]=new int[n];
		    int sum=0,c=0;
		    for(int i=0;i<n;i++){
		        a[i]=sc.nextInt();
		       c=(a[i]==1)?++c:c;
		        sum+=a[i];
		    }
		    if(c>0) System.out.println("CHEF");
		    else{
		        if(sum%2==0) System.out.println("CHEFINA");
		        else System.out.println("CHEF");
		    }
		    
		}
	}
}

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