FastPrep
Problem · String

Valid String Check

● EasyUberOA
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Given a string, check if it is valid (return 1 :) or not (return 0 :). A valid string must:

  • Be divisible by 3 (interpreted as the numeric value of the string is divisible by 3).
  • Contain the digit '7' at least twice.

    • Examples
    01 · Example 1
    s = "771"
return = 1
    :)
    02 · Example 2
    s = "777"
return = 1
    :)
    03 · Example 3
    s = "123777"
return = 1
    :)
    04 · Example 4
    s = "12345"
return = 0
    :)
    05 · Example 5
    s = "71"
return = 0
    :)
    06 · Example 6
    s = "171"
return = 0
    :)
    07 · Example 7
    s = "70"
return = 0
    :)
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    public int isValidString(String s) {
  // write your code here
}
    s"771"
    expected1
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