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  1. Prepare
  2. Algorithms
  3. Strings
  4. Common Child
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Common Child

  • ds1b_1641540100
     + 1 comment

    Code in Python 3

    #!/bin/python3

import math
import os
import random
import re
import sys

#
# Complete the 'commonChild' function below.
#
# The function is expected to return an INTEGER.
# The function accepts following parameters:
#  1. STRING s1
#  2. STRING s2
#

def commonChild(s1, s2):
    # Write your code here
    n=len(s1)
    g=len(s2)
    m=[]
    for i in range(n+1):
        m.append([])
        for _ in range(g+1):
            m[i].append(0)
    for i in range(n):
        for j in range(g):
            if s1[i]==s2[j]:
                m[i+1][j+1]=max(m[i][j]+1,m[i+1][j-1])
                continue
            m[i+1][j+1]=max(m[i+1][j],m[i][j+1])
    return m[-1][-1]

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

    s1 = input()

    s2 = input()

    result = commonChild(s1, s2)

    fptr.write(str(result) + '\n')

    fptr.close()