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Hackerranks(Diagonal Difference)
'use strict';
const fs = require('fs');
process.stdin.resume();
process.stdin.setEncoding('utf-8');
let inputString = '';
let currentLine = 0;
process.stdin.on('data', function(inputStdin) {
inputString += inputStdin;
});
process.stdin.on('end', function() {
inputString = inputString.split('\n');
main();
});
function readLine() {
return inputString[currentLine++];
}
/*
* Complete the 'diagonalDifference' function below.
*
* The function is expected to return an INTEGER.
* The function accepts 2D_INTEGER_ARRAY arr as parameter.
*/
function diagonalDifference(arr) {
let ltrsum = 0
let rtlsum = 0
for(let i = 0; i < arr.length; i++) {
ltrsum += arr[i][i]
rtlsum += arr[i][arr.length - 1 - i]
}
return Math.abs(ltrsum - rtlsum)
}
function main() {
const ws = fs.createWriteStream(process.env.OUTPUT_PATH);
const n = parseInt(readLine().trim(), 10);
let arr = Array(n);
for (let i = 0; i < n; i++) {
arr[i] = readLine().replace(/\s+$/g, '').split(' ').map(arrTemp => parseInt(arrTemp, 10));
}
const result = diagonalDifference(arr);
ws.write(result + '\n');
ws.end();
}
'use strict';
process.stdin.resume();
process.stdin.setEncoding('utf-8');
let inputString = '';
let currentLine = 0;
process.stdin.on('data', function(inputStdin) {
inputString += inputStdin;
});
process.stdin.on('end', function() {
inputString = inputString.split('\n');
main();
});
function readLine() {
return inputString[currentLine++];
}
/*
* Complete the 'plusMinus' function below.
*
* The function accepts INTEGER_ARRAY arr as parameter.
*/
function plusMinus(arr) {
// Write your code here
const positiveRatio = arr.filter(item => item > 0).length / arr.length
const negativeRatio = arr.filter(item => item < 0).length / arr.length
const zeroRatio = arr.filter(item => item === 0).length / arr.length
console.log(positiveRatio.toFixed(6))
console.log(negativeRatio.toFixed(6))
console.log(zeroRatio.toFixed(6))
}
function main() {
const n = parseInt(readLine().trim(), 10);
const arr = readLine().replace(/\s+$/g, '').split(' ').map(arrTemp => parseInt(arrTemp, 10));
plusMinus(arr);
}
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