CF 1303A - Erasing Zeroes
You are given a string s
. Each character is either 0 or 1.
You want all 1's in the string to form a contiguous subsegment. For example, if the string is 0, 1, 00111 or 01111100, then all 1's form a contiguous subsegment, and if the string is 0101, 100001 or 11111111111101, then this condition is not met.
You may erase some (possibly none) 0's from the string. What is the minimum number of 0's that you have to erase?
Input
The first line contains one integer t (1≤t≤100) — the number of test cases.
Then t lines follow, each representing a test case. Each line contains one string s (1≤|s|≤100); each character of s is either 0 or 1.
Output
Print t integers, where the i-th integer is the answer to the i-th testcase (the minimum number of 0's that you have to erase from s).
Example
input
3
010011
0
1111000
output
2
0
0
Note
In the first test case you have to delete the third and forth symbols from string 010011 (it turns into 0111).
找到1中間的0,然后數(shù)有多少個0即可,怎么判斷呢,就是找到最左邊的1,跟最右邊的1,然后在這兩個位置中間找0的個數(shù),即可;
一開始糊涂了,以為是找10跟01存在,而且10在01前面的話,就可以,然后判斷,看了此方法不好啊。還是上面第一種方法清晰明了;
下面是代碼: