larrys array

Author: prabaprakash

larrys-array.js

@@ -0,0 +1,54 @@
+'use strict';
+
+const fs = require('fs');
+
+process.stdin.resume();
+process.stdin.setEncoding('utf-8');
+
+let inputString = '';
+let currentLine = 0;
+
+process.stdin.on('data', inputStdin => {
+    inputString += inputStdin;
+});
+
+process.stdin.on('end', _ => {
+    inputString = inputString.replace(/\s*$/, '')
+        .split('\n')
+        .map(str => str.replace(/\s*$/, ''));
+
+    main();
+});
+
+function readLine() {
+    return inputString[currentLine++];
+}
+
+// Complete the larrysArray function below.
+function larrysArray(A) {
+    let count = 0;
+    for (let i = 1; i < A.length; i++) {
+        for (let k = 0; k < i; k++) {
+            if (A[k] > A[i]) count++;
+        }
+    }
+    return count % 2 === 0 ? "YES": "NO";
+}
+
+function main() {
+    const ws = fs.createWriteStream(process.env.OUTPUT_PATH);
+
+    const t = parseInt(readLine(), 10);
+
+    for (let tItr = 0; tItr < t; tItr++) {
+        const n = parseInt(readLine(), 10);
+
+        const A = readLine().split(' ').map(ATemp => parseInt(ATemp, 10));
+
+        let result = larrysArray(A);
+
+        ws.write(result + "\n");
+    }
+
+    ws.end();
+}