Solve 7

src/7/index.ts

@@ -0,0 +1,70 @@
+import fs from "fs"
+const content = fs.readFileSync('input.txt', 'utf-8');
+const rows = content.split("\r\n")
+interface Calc {
+    result: number,
+    numbers: number[],
+}
+
+const calculations = rows.map(row => {
+    const res = Number(row.split(":")[0]);
+    const tail = row.split(":")[1].trim();
+    const num = tail.split(" ").map(numStr => Number(numStr));
+    return {result: res, numbers: num}
+})
+let calcualtable = 0;
+calculations.forEach(calculation => {
+    const operations = calculation.numbers.length-1;
+    const table = []
+    const max = Math.pow(2,operations)
+    for (let i = 0; i < max ; i++) {
+        let toPush = (max-(i+1)).toString(2)
+        while (toPush.length < operations) toPush = "0" + toPush;
+        table.push(toPush.split("").map(str => Number(str)));
+    }
+    for (let c = 0; c < table.length; c++) {
+        const combination = table[c];
+        const calcTable = structuredClone(calculation.numbers);
+        for (let i = 0; i < calcTable.length-1; i++) {
+            if (combination[i] === 0) {
+                calcTable[i+1] = calcTable[i] + calcTable[i+1]
+            } else {
+                calcTable[i+1] = calcTable[i] * calcTable[i+1]
+            }
+        }
+        if (calculation.result === calcTable[calcTable.length-1]) {
+            calcualtable += calculation.result;
+            break;
+        }
+    }
+})
+console.log(calcualtable)
+calcualtable = 0;
+calculations.forEach(calculation => {
+    const operations = calculation.numbers.length-1;
+    const table = []
+    const max = Math.pow(3,operations)
+    for (let i = 0; i < max ; i++) {
+        let toPush = (max-(i+1)).toString(3)
+        while (toPush.length < operations) toPush = "0" + toPush;
+        table.push(toPush.split("").map(str => Number(str)));
+    }
+    for (let c = 0; c < table.length; c++) {
+        const combination = table[c];
+        const calcTable = structuredClone(calculation.numbers);
+        for (let i = 0; i < calcTable.length-1; i++) {
+            if (combination[i] === 0) {
+                calcTable[i+1] = calcTable[i] + calcTable[i+1]
+            } else if (combination[i] === 1) {
+                calcTable[i+1] = calcTable[i] * calcTable[i+1]
+            } else {
+                calcTable[i+1] = Number("" + calcTable[i] + calcTable[i+1])
+            }
+        }
+        if (calculation.result === calcTable[calcTable.length-1]) {
+            calcualtable += calculation.result;
+            break;
+        }
+    }
+})
+console.log(calcualtable)