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Find the winner of a game where scores are given as a binary string

  • Last Updated : 27 Dec, 2018

Given a binary string representing the scores of a Volleyball match. The task is to find the winner of the match according to below conditions:

  • In volleyball, the two teams play with each other and the team which scores 15 points first will be the winner except the case when both teams have reached to 14 points.
  • In the case when both teams have reached 14 points then the team maintaining a lead of two points will be the winner.

In the given binary string, 0 means GEEK’s team lose a point and 1 means GEEK’s team win a point. You have to find whether GEEK’s team had won or lost the match.


Examples:

Input : score[] = 01011111111110110101
Output : GEEK's won

Input : score[] = 010101010101010101010101010100
Output : GEEK's lost

Case I : When one of the team scores 15 points first and the second team has scored less than 15 points. Then traverse the given binary string and store the count of zero’s and one’s. After that if you get the count of one to be 15 and the count of zero less than 15 then GEEK’s won and on the other hand if you get count of zero to be 15 and count of one less than 15 then GEEK’s lost.



Case II : When both of the team scores 14 points then reset count of both to zero and for each zero or one increment their count and simultaneously check if abs(count[0] – count[1]) is equal to 2, if this happens then it means any one of the team had scored two more points than its opponent and will be the winner. You can than find the winner on the value of count[0] and count[1].

Below is the implementation of the above approach:

C++




// Cpp program for predicting winner
#include <bits/stdc++.h>
using namespace std;
  
// function for winner prediction
void predictWinner(string score, int n)
{
  
    int count[2] = { 0 }, i;
    for (i = 0; i < score.size(); i++) {
  
        // increase count
        count[score[i] - '0']++; 
  
        // check losing condition
        if (count[0] == n && count[1] < n - 1) {
            cout << "GEEKS lost";
            return;
        }
  
        // check winning condition
        if (count[1] == n && count[0] < n - 1) {
            cout << "GEEKS won";
            return;
        }
  
        // check tie on n-1 point
        if (count[0] == n - 1 && count[1] ==
                                   n - 1) {
            count[0] = 0;
            count[1] = 0;
            break;
        }
    }
  
    for (i++; i < score.size(); i++) {
  
        // increase count
        count[score[i] - '0']++; 
  
        // check for 2 point lead
        if (abs(count[0] - count[1]) == 2) {
  
            // condition of lost
            if (count[0] > count[1])
                cout << "GEEKS lost";
  
            // condition of win
            else
                cout << "GEEKS won";
  
            return;
        }
    }
}
  
// driver program
int main()
{
    string score = "1001010101111011101111";
    int n = 15;
    predictWinner(score, n);
    return 0;
}

Java




// Java program for 
// predicting winner
import java.io.*;
import java.util.*;
import java.lang.*;
  
class GFG
{
// function for 
// winner prediction
static void predictWinner(String score, 
                          int n)
{
  
    int count[] = new int[2], i;
    for (i = 0;
         i < score.length(); i++) 
    {
  
        // increase count
        count[score.charAt(i) - '0']++; 
  
        // check losing
        // condition
        if (count[0] == n && 
            count[1] < n - 1
        {
            System.out.print("GEEKS lost");
            return;
        }
  
        // check winning condition
        if (count[1] == n && 
            count[0] < n - 1
        {
            System.out.print("GEEKS won");
            return;
        }
  
        // check tie on n-1 point
        if (count[0] == n - 1 && 
            count[1] == n - 1
        {
            count[0] = 0;
            count[1] = 0;
            break;
        }
    }
  
    for (i++; i < score.length(); i++) 
    {
  
        // increase count
        count[score.charAt(i) - '0']++; 
  
        // check for 2 point lead
        if (Math.abs(count[0] - 
                     count[1]) == 2
        {
  
            // condition of lost
            if (count[0] > count[1])
                System.out.print("GEEKS lost");
  
            // condition of win
            else
                System.out.print("GEEKS won");
  
            return;
        }
    }
}
  
// Driver Code
public static void main(String[] args)
{
    String score = "1001010101111011101111";
    int n = 15;
    predictWinner(score, n);
}
}

Python3




# Python 3 program for predicting winner
  
# function for winner prediction
def predictWinner(score, n):
    count = [0 for i in range(2)]
  
    for i in range(0, len(score), 1):
          
        # increase count
        index = ord(score[i]) - ord('0')
        count[index] += 1
  
        # check losing condition
        if (count[0] == n and count[1] < n - 1):
            print("GEEKS lost", end = " ")
            return
  
        # check winning condition
        if (count[1] == n and count[0] < n - 1):
            print("GEEKS won", end = " ")
            return
  
        # check tie on n-1 point
        if (count[0] == n - 1 and 
            count[1] == n - 1):
            count[0] = 0
            count[1] = 0
            break
    i += 1    
          
    for i in range(i, len(score), 1):
          
        # increase count
        index = ord(score[i]) - ord('0')
        count[index] += 1
  
        # check for 2 point lead
        if (abs(count[0] - count[1]) == 2):
              
            # condition of lost
            if (count[0] > count[1]):
                print("GEEKS lost", end = " ")
  
            # condition of win
            else:
                print("GEEKS won", end = " ");
  
            return
  
# Driver Code
if __name__ == '__main__':
    score = "1001010101111011101111"
    n = 15
    predictWinner(score, n)
  
# This code is contributed by 
# Surendra_Gangwar

C#




// C# program for predicting winner 
using System;
  
class GFG
{
// function for winner prediction 
public static void predictWinner(string score, 
                                 int n)
{
  
    int[] count = new int[2]; int i;
    for (i = 0; i < score.Length; i++)
    {
  
        // increase count 
        count[score[i] - '0']++;
  
        // check losing 
        // condition 
        if (count[0] == n && count[1] < n - 1)
        {
            Console.Write("GEEKS lost");
            return;
        }
  
        // check winning condition 
        if (count[1] == n && count[0] < n - 1)
        {
            Console.Write("GEEKS won");
            return;
        }
  
        // check tie on n-1 point 
        if (count[0] == n - 1 && 
            count[1] == n - 1)
        {
            count[0] = 0;
            count[1] = 0;
            break;
        }
    }
  
    for (i++; i < score.Length; i++)
    {
  
        // increase count 
        count[score[i] - '0']++;
  
        // check for 2 point lead 
        if (Math.Abs(count[0] - count[1]) == 2)
        {
  
            // condition of lost 
            if (count[0] > count[1])
            {
                Console.Write("GEEKS lost");
            }
  
            // condition of win 
            else
            {
                Console.Write("GEEKS won");
            }
  
            return;
        }
    }
}
  
// Driver Code 
public static void Main(string[] args)
{
    string score = "1001010101111011101111";
    int n = 15;
    predictWinner(score, n);
}
}
  
// This code is contributed by Shrikant13
Output:
GEEKS won

This article is contributed by Shivam Pradhan (anuj_charm). If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

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