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51 lines
847 B

package main
import (
"fmt"
"os"
)
func matchBrackets(exp string) bool {
runes := []rune(exp)
var opened []rune
ptr := -1
for _, c := range runes {
if c == '(' || c == '[' || c == '{' {
opened = append(opened, c)
ptr++
} else if c == ')' {
if ptr < 0 || opened[ptr] != '(' {
return false
}
opened = opened[:len(opened)-1]
ptr--
} else if c == ']' {
if ptr < 0 || opened[ptr] != '[' {
return false
}
opened = opened[:len(opened)-1]
ptr--
} else if c == '}' {
if ptr < 0 || opened[ptr] != '{' {
return false
}
opened = opened[:len(opened)-1]
ptr--
}
}
return len(opened) == 0
}
func main() {
if len(os.Args) == 1 {
fmt.Println()
} else {
for _, v := range os.Args[1:] {
if matchBrackets(v) {
fmt.Println("OK")
} else {
fmt.Println("Error")
}
}
}
}