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42 lines
748 B
JavaScript

// TODO: optimization needed
// const input = "0,3,6";
const input = "9,3,1,0,8,4";
const start = input.split(",");
const memory = {};
let turn = 1;
let lastNum = null;
for (const num of start) {
if (lastNum !== null) {
memory[lastNum] = turn - 1;
}
lastNum = num;
console.log(`Turn ${turn}: ${num}`);
turn += 1;
}
let num;
let lastLog = new Date();
while (turn <= 30000000) {
if (typeof memory[lastNum] === "undefined") {
num = 0;
} else {
num = turn - 1 - memory[lastNum];
}
const now = new Date();
if (now - lastLog > 5000) {
console.log(`Turn ${turn.toLocaleString()}, num: ${num}`);
lastLog = now;
}
memory[lastNum] = turn - 1;
lastNum = num;
turn += 1;
}
console.log("Solution:", num);