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| func evalRPN(tokens []string) int {
var stack []int
for _, v := range tokens {
if isDigit(v) {
num, _ := strconv.Atoi(v)
stack = append(stack, num)
} else {
a, b := stack[len(stack)-2], stack[len(stack)-1]
stack = stack[:len(stack)-2]
switch v {
case "+":
stack = append(stack, a+b)
case "-":
stack = append(stack, a-b)
case "*":
stack = append(stack, a*b)
case "/":
stack = append(stack, a/b)
}
}
}
return stack[0]
}
func isDigit(val string) bool {
for _, v := range val {
if unicode.IsDigit(v) {
return true
}
}
return false
}
|
