12 lines
238 B
Text
12 lines
238 B
Text
mata
|
|
function random_brackets(n) {
|
|
return(invtokens(("[","]")[runiformint(1,2*n,1,2)],""))
|
|
}
|
|
|
|
function is_balanced(s) {
|
|
n = strlen(s)
|
|
if (n==0) return(1)
|
|
a = runningsum(92:-ascii(s))
|
|
return(all(a:>=0) & a[n]==0)
|
|
}
|
|
end
|