Help me in solving BMMC18 problem

help
,
1

My issue

My code

// Update the code below to solve the problem

#include <iostream>
#include <string>
using namespace std;

int main() 
{
 int t;
 cin>>t;
while(t--)
 { 
     int A,B;
     cin>>A>>B;
     if(A==0 && B==0)
     {
         cout<<7<<endl;
     }
     else{
     cout<<min(A,B)<<endl;
     }
  }
 return 0;
}

Learning course: Solve Programming problems using C++
Problem Link: CodeChef: Practical coding for everyone

2

First let me explain what your code does:
When the else block is executed, the compiler outputs the value of score that is least among the two values. So, if Alice has 3 points and Bob has 4 points the output according to your code is 3 (which in this case is even the right answer :sweat_smile:).
But if Alice has 5 points and Bob has 4 points the output will be 4 and here your answer will come out to be wrong.

Now coming to the demand of the problem statement:
The problem demands us to find “the minimum number of points that will be further scored in the match before it ends.”

So, suppose the problem where Alice has 5 points and Bob has 4 points. The match ends when either Alice or Bob scores 7 points. Now, Alice needs 2 more points to win the game whereas Bob needs 3 more points. If we want to end this game as soon as possible, Alice needs to score 2 more points consecutively.

Hence the formula that will be used here will be 7-max(A,B).
Note that this formula accommodates all the possible cases ranging from 0 to 7 and therefore you don’t even need to use if-else statement!!!
Even if the score is 0-0 the minimum number of points required to finish this game will be 7 (either Alice score 7 consecutive points or Bob score 7 consecutive points).

So the final code would look like this

#include <iostream>
#include <string>
using namespace std;

int main() 
{
 int t;
 cin>>t;
 while(t--)
 { 
     int A,B;
     cin>>A>>B;
     cout<<7-max(A,B)<<endl;
  }
 return 0;
}

Hope I answered your problem.

Cheers !!!``

1 Like
3

@ruby_stacy
You would need to calculate the maximum value between A and B, and print its difference from seven.

Here is my code for reference.

// Update the code below to solve the problem

#include <iostream>
#include <string>
using namespace std;

int main() 
{
 int t;
 cin>>t;
while(t--)
 { 
    int a,b;
    cin>>a>>b;
    if(a>b)
    {
        cout<<(7-a)<<endl;
    }
    else
    {
        cout<<(7-b)<<endl;
    }
 }
 return 0;
}
1 Like
4

Thank you :slight_smile:

1 Like
5

Thank you :smiley:

6

My pleasure buddy :hugs: