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@@ -0,0 +1,58 @@
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+package main
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+
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+import (
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+ "bufio"
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+ "fmt"
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+ "os"
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+ "strconv"
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+)
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+
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+
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+func main() {
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+ fmt.Println("Advent of Code 2025 - Day 3 - Part 1")
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+ f,_:= os.Open("3/input")
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+ defer f.Close()
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+ scanner := bufio.NewScanner(f)
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+ var res int;
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+ for scanner.Scan(){
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+ bank := scanner.Text()
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+ max_volt,_ := max_voltage(bank)
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+ res += max_volt
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+ }
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+ fmt.Println(res)
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+}
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+
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+
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+func max_voltage(bank string) (int, error){
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+ max1, max2 := byte('0'),byte('0')
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+ i_max1, i_max2:= -1,-1
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+ var result string
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+
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+ for i:= 0; i < len(bank); i++{
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+ if bank[i] > max1{
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+ max1,i_max1 = bank[i],i
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+ }
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+ }
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+
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+ for i:= i_max1+1; i < len(bank); i++{
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+ if bank[i] > max2{
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+ max2,i_max2 = bank[i],i
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+ }
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+ }
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+
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+ if i_max2 == -1 {
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+ for i:= 0; i < len(bank); i++{
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+ if bank[i] > max2 && i != i_max1{
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+ max2,i_max2 = bank[i],i
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+ }
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+ }
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+ }
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+
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+ if i_max2 > i_max1 {
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+ result = string([]byte{max1, max2})
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+ } else {
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+ result = string([]byte{max2, max1})
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+ }
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+
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+ return strconv.Atoi(result)
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+}
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