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-rw-r--r--largest_3_digit_string.py36
1 files changed, 36 insertions, 0 deletions
diff --git a/largest_3_digit_string.py b/largest_3_digit_string.py
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+# 2264. Largest 3-Same-Digit Number in String
+
+"""
+given a string 'num' representing a large integer, an integer is good if it
+meets the following conditions: if it is a substring of 'num' with length
+'3', it consists of only one unique digit. return the maximum good integer as
+a string or an empty string "" if no such integer.
+"""
+
+
+class Solution(object):
+ def largestGoodInteger(self, num):
+ """
+ :type num: str
+ :rtype: str
+ """
+ ans = ""
+ empty = ""
+ tmp = 0
+ check = True
+ for i in range(len(num) - 2):
+ if i + 2 < len(num) and num[i] == num[i + 1] == num[i + 2]:
+ tmp = max(tmp, int(num[i]))
+ check = False
+ if not check:
+ ans += str(tmp) * 3
+ else:
+ return empty
+ return ans
+
+
+if __name__ == "__main__":
+ obj = Solution()
+ print(obj.largestGoodInteger("6777133339")) # expect: 777
+ print(obj.largestGoodInteger("2300019")) # expect: 000
+ print(obj.largestGoodInteger("42352338")) # expect: NULL