3340-CheckBalancedString.go

package main

// 3340. Check Balanced String
// You are given a string num consisting of only digits. 
// A string of digits is called balanced if the sum of the digits at even indices is equal to the sum of digits at odd indices.

// Return true if num is balanced, otherwise return false.

// Example 1:
// Input: num = "1234"
// Output: false
// Explanation:
// The sum of digits at even indices is 1 + 3 == 4, and the sum of digits at odd indices is 2 + 4 == 6.
// Since 4 is not equal to 6, num is not balanced.

// Example 2:
// Input: num = "24123"
// Output: true
// Explanation:
// The sum of digits at even indices is 2 + 1 + 3 == 6, and the sum of digits at odd indices is 4 + 2 == 6.
// Since both are equal the num is balanced.

// Constraints:
//     2 <= num.length <= 100
//     num consists of digits only

import "fmt"

func isBalanced(num string) bool {
    res := make([]int, 2)
    for i, v := range num {
        res[i % 2] += int(v - '0')
    }
    return res[0] == res[1]
}

func main() {
    // Example 1:
    // Input: num = "1234"
    // Output: false
    // Explanation:
    // The sum of digits at even indices is 1 + 3 == 4, and the sum of digits at odd indices is 2 + 4 == 6.
    // Since 4 is not equal to 6, num is not balanced.
    fmt.Println(isBalanced("1234")) // false
    // Example 2:
    // Input: num = "24123"
    // Output: true
    // Explanation:
    // The sum of digits at even indices is 2 + 1 + 3 == 6, and the sum of digits at odd indices is 4 + 2 == 6.
    // Since both are equal the num is balanced.
    fmt.Println(isBalanced("24123")) // true
}