Class Solution
java.lang.Object
g1501_1600.s1573_number_of_ways_to_split_a_string.Solution
public class Solution
extends java.lang.Object
1573 - Number of Ways to Split a String.
Medium
Given a binary string s
, you can split s
into 3 non-empty strings s1
, s2
, and s3
where s1 + s2 + s3 = s
.
Return the number of ways s
can be split such that the number of ones is the same in s1
, s2
, and s3
. Since the answer may be too large, return it modulo 109 + 7
.
Example 1:
Input: s = “10101”
Output: 4
Explanation: There are four ways to split s in 3 parts where each part contain the same number of letters ‘1’.
“1|010|1”
“1|01|01”
“10|10|1”
“10|1|01”
Example 2:
Input: s = “1001”
Output: 0
Example 3:
Input: s = “0000”
Output: 3
Explanation: There are three ways to split s in 3 parts.
“0|0|00”
“0|00|0”
“00|0|0”
Constraints:
3 <= s.length <= 105
s[i]
is either'0'
or'1'
.
-
Constructor Summary
-
Method Summary
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
-
Constructor Details
-
Solution
public Solution()
-
-
Method Details
-
numWays
public int numWays(java.lang.String s)
-