[Python] A program that compares each element of list one by one and wins or loses. zip ()

[Python] A program that compares each element of list one by one and wins or loses. zip ()

When two arrays are given, the first element of each is compared, the winner is given 1 point, and the score of each is output.

Alice vs Bob. One point will be given to the winner. 0 points for a draw.

▼sample input

17 28 30
99 16 8

▼sampel output

2 1

▼my answer

python

def compareTriplets(a, b):
#Set variables for counting the number of wins and losses. Initial value 0
    alice=0
    bob=0

#Compare the elements of a given array one by one
    for pair in zip(a,b):
        if pair[0]>pair[1]:
            alice+=1
        elif pair[0]<pair[1]:
            bob+=1

#Returns a return value
    return (alice,bob)

#input processing
if __name__ == '__main__':
    fptr = open(os.environ['OUTPUT_PATH'], 'w')

    a = list(map(int, input().rstrip().split()))

    b = list(map(int, input().rstrip().split()))

    result = compareTriplets(a, b)

    fptr.write(' '.join(map(str, result)))
    fptr.write('\n')

    fptr.close()

Extract elements from multiple arrays one by one

Use zip (array 1, array 2) The type is zip. The first element of array 1 and the first element of array 2 are set in a nested structure, and a new element is used as the first element.

python

a=[1,2,3]
b=[4,5,6]
print(list(zip(a, b)))

#output
[(1, 4), (2, 5), (3, 6)]

Combination of zip and for statement

python

a=[1,2,3]
b=[4,5,6]

for pair in zip(a,b):
    print(pair)

#output
(1, 4)
(2, 5)
(3, 6)

rstrip() Remove trailing whitespace

a="   a bcd efg     "
a.rstrip()

#output
'   a bcd efg'

Remove whitespace at the beginning and end of sentences

.strip () Remove leading and trailing spaces .lstrip () Remove leading whitespace .rstrip () Remove trailing whitespace

• The space between them does not disappear

python

letter="   a bcd efg     "

s = letter.strip()
l = letter.lstrip()
r = letter.rstrip()

print(s)
print(l)
print(r)

#output
a bcd efg ← Up to here
a bcd efg ← Up to here
a bcd efg ← Up to here

Delete the specified characters at the beginning and end of the sentence

.strip ("character string ") Start and end .lstrip ("character string ") beginning .rstrip ("character string ") end

• If it is continuous, all
• The characters in between will not disappear

python

letter="a bad eaa"

s = letter.strip("a")
l = letter.lstrip("a")
r = letter.rstrip("a")

print(s)
print(l)
print(r)

#output
 bad e
 bad eaa
a bad e

Method output definition

①return If the call has fptr = open (os.environ ['OUTPUT_PATH'],'w'). The method is assigned to a variable. result = compareTriplets (a, b)

②print If you are executing a method. If the final output is compareTriplets (a, b), print () is used in the method.