Sunday, 2 November 2014

PROJECT EULER SOLUTION # 54

QUESTION # 54
In the card game poker, a hand consists of five cards and are ranked, from lowest to highest, in the following way:
  • High Card: Highest value card.
  • One Pair: Two cards of the same value.
  • Two Pairs: Two different pairs.
  • Three of a Kind: Three cards of the same value.
  • Straight: All cards are consecutive values.
  • Flush: All cards of the same suit.
  • Full House: Three of a kind and a pair.
  • Four of a Kind: Four cards of the same value.
  • Straight Flush: All cards are consecutive values of same suit.
  • Royal Flush: Ten, Jack, Queen, King, Ace, in same suit.
The cards are valued in the order:
2, 3, 4, 5, 6, 7, 8, 9, 10, Jack, Queen, King, Ace.
If two players have the same ranked hands then the rank made up of the highest value wins; for example, a pair of eights beats a pair of fives (see example 1 below). But if two ranks tie, for example, both players have a pair of queens, then highest cards in each hand are compared (see example 4 below); if the highest cards tie then the next highest cards are compared, and so on.
Consider the following five hands dealt to two players:
Hand

Player 1

Player 2

Winner
1

5H 5C 6S 7S KD
Pair of Fives

2C 3S 8S 8D TD
Pair of Eights

Player 2
2

5D 8C 9S JS AC
Highest card Ace

2C 5C 7D 8S QH
Highest card Queen

Player 1
3

2D 9C AS AH AC
Three Aces

3D 6D 7D TD QD
Flush with Diamonds

Player 2
4

4D 6S 9H QH QC
Pair of Queens
Highest card Nine

3D 6D 7H QD QS
Pair of Queens
Highest card Seven

Player 1
5

2H 2D 4C 4D 4S
Full House
With Three Fours

3C 3D 3S 9S 9D
Full House
with Three Threes

Player 1
The file, poker.txt, contains one-thousand random hands dealt to two players. Each line of the file contains ten cards (separated by a single space): the first five are Player 1's cards and the last five are Player 2's cards. You can assume that all hands are valid (no invalid characters or repeated cards), each player's hand is in no specific order, and in each hand there is a clear winner.
How many hands does Player 1 win?

SOLUTION # 54
#include<stdio.h>
void sort(int *arr,char*suit)
{
    int i,j,n,flag,temp;
    n=5;
    for(i=1;i<n;i++)
    {
        flag=0;
        for(j=0;j<n-i;j++)
            if(arr[j]>arr[j+1])
            {
                flag=1;

                temp=arr[j];
                arr[j]=arr[j+1] ;
                arr[j+1]=temp;

                temp=suit[j];
                suit[j]=suit[j+1] ;
                suit[j+1]=temp;
            }
        if(flag==0)
            break;
    }
}
int inCaseOfTie(int*value1,int*value2)
{
    int i=4;
    while(value1[i]==value2[i])
        i--;
    if(value1[i]>value2[i])
        return 1;
    return 2;
}

int isSameSuit(char*suit)
{
    int i;
    for(i=0;i<4;i++)
        if(suit[i]!=suit[i+1])
            return 0;
    return 1;
}
int isRoyalFlush(int *value,char*suit)
{
    if(!isSameSuit(suit))
        return 0;
    if(value[0]==10 && value[0]==11 && value[0]==12 && value[0]==13 && value[0]==14)
        return 1;
    return 0;
}

int isStraightFlush(int *value,char*suit)
{
    if(!isSameSuit(suit))
        return 0;
    return isStraight(value,suit);
}

int isFourOfAKind(int *value)
{
    if(value[0]==value[1] && value[0]==value[2] && value[0]==value[3])
        return value[0];
    if(value[1]==value[2] && value[1]==value[3] && value[1]==value[4])
        return value[1];
    return 0;
}

int isThreeOfAKind(int *value)
{
    if(value[0]==value[1] && value[0]==value[2])
        return value[0];
    if(value[1]==value[2] && value[1]==value[3])
        return value[1];
    if(value[2]==value[3] && value[2]==value[4])
        return value[2];
    return 0;

}
int isTwoPairs(int*value)
{
    if(value[0]==value[1])
    {
        if(value[2]==value[3])
            return 123;
        if(value[3]==value[4])
            return 134;
    }
    if(value[1]==value[2] && value[3]==value[4])
        return 1234;
    return 0;
}

int isOnePair(int*value)
{
    if(value[0]==value[1])
        return value[0];
    if(value[1]==value[2])
        return value[1];
    if(value[2]==value[3])
        return value[2];
    if(value[3]==value[4])
        return value[3];
    return 0;
}
int isFullHouse(int *value)
{
    if(value[0]==value[1] && value[2]==value[3] &&  value[3]==value[4])
        return value[2];
    if(value[3]==value[4] && value[0]==value[1] &&  value[1]==value[2])
        return value[2];
    return 0;
}

int isFlush(char*suit)
{
    return isSameSuit(suit);
}

int isStraight(int *value)
{
    if(value[1]==value[0]+1 && value[2]==value[0]+2 && value[3]==value[0]+3 && value[4]==value[0]+4)
        return 1;
    return 0;
}
int whoWins(int*value1,char*suit1,int*value2,char*suit2)
{
    int player1pair1,player1pair2,player2pair1,player2pair2,a,b,c,d;
    if(isRoyalFlush(value1,suit1))
        return 1;
    if(isRoyalFlush(value2,suit2))
        return 2;

    if(isStraightFlush(value1,suit1) && !isStraightFlush(value2,suit2))
        return 1;
    if(!isStraightFlush(value1,suit1) && isStraightFlush(value2,suit2))
        return 2;
    if(isStraightFlush(value1,suit1) && isStraightFlush(value2,suit2))    
        return inCaseOfTie(value1,value2);

    if(isFourOfAKind(value1) && !isFourOfAKind(value2))
        return 1;
    if(!isFourOfAKind(value1) && isFourOfAKind(value2))
        return 2;
    if(isFourOfAKind(value1) && isFourOfAKind(value2))
    {
        if(isFourOfAKind(value1)> isFourOfAKind(value2))
            return 1;
        if(isFourOfAKind(value1)< isFourOfAKind(value2))
            return 2;
        return inCaseOfTie(value1,value2);
    }

    if(isFullHouse(value1) && !isFullHouse(value2))
        return 1;
    if(!isFullHouse(value1) && isFullHouse(value2))
        return 2;
    if(isFullHouse(value1) && isFullHouse(value2))
    {
        if(isFullHouse(value1)> isFullHouse(value2))
            return 1;
        if(isFullHouse(value1)< isFullHouse(value2))
            return 2;
        return inCaseOfTie(value1,value2);
    }

    if(isFlush(suit1) && !isFlush(suit2))
        return 1;
    if(!isFlush(suit1) && isFlush(suit2))
        return 2;
    if(isFlush(suit1) && isFlush(suit2))
        return inCaseOfTie(value1,value2);

    if(isStraight(value1) && !isStraight(value2))
        return 1;
    if(!isStraight(value1) && isStraight(value2))
        return 2;
    if(isStraight(value1) && isStraight(value2))
        return inCaseOfTie(value1,value2);

    if(isThreeOfAKind(value1) && !isThreeOfAKind(value2))
        return 1;
    if(!isThreeOfAKind(value1) && isThreeOfAKind(value2))
        return 2;
    if(isThreeOfAKind(value1) && isThreeOfAKind(value2))
    {
        if(isThreeOfAKind(value1)> isThreeOfAKind(value2))
            return 1;
        if(isThreeOfAKind(value1)< isThreeOfAKind(value2))
            return 2;
        return inCaseOfTie(value1,value2);
    }

    if(isTwoPairs(value1) && !isTwoPairs(value2))
        return 1;
    if(!isTwoPairs(value1) && isTwoPairs(value2))
        return 2;
    if(isTwoPairs(value1) && isTwoPairs(value2))
    {
        player1pair1=value1[isTwoPairs(value1)%10];
        player1pair2=value1[(isTwoPairs(value1)/100)%10];
        player2pair1=value2[isTwoPairs(value2)%10];
        player2pair2=value2[(isTwoPairs(value2)/100)%10];
        a=(player1pair1>player1pair2?player1pair1:player1pair2);
        b=(player1pair1<player1pair2?player1pair1:player1pair2);
        c=(player2pair1>player2pair2?player2pair1:player2pair2);
        d=(player2pair1<player2pair2?player2pair1:player2pair2);
        if(a>c)
            return 1;
        else if (a<c)
            return 2;
        else if(b>d)
            return 1;
        else if (b<d)
            return 2;

        return inCaseOfTie(value1,value2);
    }

    if(isOnePair(value1) && !isOnePair(value2))
        return 1;
    if(!isOnePair(value1) && isOnePair(value2))
        return 2;
    if(isOnePair(value1) && isOnePair(value2))
    {
        if(isOnePair(value1)> isOnePair(value2))
            return 1;
        if(isOnePair(value1)< isOnePair(value2))
            return 2;
        return inCaseOfTie(value1,value2);
    }
    return inCaseOfTie(value1,value2);
}
void print(int*value,char *suit)
{
    int i;
    for(i=0;i<5;i++)
        printf("%d%c ",value[i],suit[i]);
    printf("\n");
}
int main()
{
    int n,i,j,answer=0;
    int value1[10],value2[10];
    char suit1[10],suit2[10],temp;
    FILE *f;
    n=1000;
    f=fopen("poker.txt","r");
    if(f)
    {
        for(i=0;i<n;i++)
        {
            for(j=0;j<5;j++)
            {
                fscanf(f," %c%c",&temp,&suit1[j]);
                if(temp=='T')
                    value1[j]=10;
                else if(temp=='J')
                    value1[j]=11;
                else if(temp=='Q')
                    value1[j]=12;
                else if(temp=='K')
                    value1[j]=13;
                else if(temp=='A')
                    value1[j]=14;
                else
                    value1[j]=temp-48;
            }
            for(j=0;j<5;j++)
            {
                fscanf(f," %c%c",&temp,&suit2[j]);
                if(temp=='T')
                    value2[j]=10;
                else if(temp=='J')
                    value2[j]=11;
                else if(temp=='Q')
                    value2[j]=12;
                else if(temp=='K')
                    value2[j]=13;
                else if(temp=='A')
                    value2[j]=14;
                else
                    value2[j]=temp-48;
            }
            sort(value1,suit1);
            sort(value2,suit2);

            if(whoWins(value1,suit1,value2,suit2)==1)
                answer++;
        }
        printf("answer = %d",answer);
    }
    else
        printf("There was some error in opening the file\n");
    return 0;
}


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