27 lines
561 B
JavaScript
27 lines
561 B
JavaScript
#!/usr/bin/env nodejs
|
|
function ack(M, N){
|
|
const next = new Float64Array(M + 1);
|
|
const goal = new Float64Array(M + 1).fill(1, 0, M);
|
|
const n = N + 1;
|
|
|
|
// This serves as a sentinel value;
|
|
// next[M] never equals goal[M] == -1,
|
|
// so we don't need an extra check for
|
|
// loop termination below.
|
|
goal[M] = -1;
|
|
|
|
let v;
|
|
do {
|
|
v = next[0] + 1;
|
|
let m = 0;
|
|
while (next[m] === goal[m]) {
|
|
goal[m] = v;
|
|
next[m++]++;
|
|
}
|
|
next[m]++;
|
|
} while (next[M] !== n);
|
|
return v;
|
|
}
|
|
var args = process.argv;
|
|
console.log(ack(parseInt(args[2]), parseInt(args[3])));
|