Spiraali

var readline = require('readline');
var r = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
    terminal: false
});

function min(arr) {
    return arr.reduce((min, current) => min < current ? min : current);
}

function solve(n, x, y) {
    
    const layer = (x, y) => min([ x, n - x - 1, y, n - y - 1 ]);
    const sideLength = (l) => n - l * 2;

    const l = layer(x, y);
    
    let s = sideLength(l);
    let outside = n*n - s*s;
    s--;

    let debug = 0;

    let result = -2;
    if (x == l && y >= l && y < l + s) {
        result = outside +(y - l) +1;
        debug = 1;
    } else if (y == l) {
        result = outside -(x - l) +4*s +1;
        debug = 4;
    } else if (n - x - 1 == l) {
        result = outside -(y - l) +3*s +1;
        debug = 3;
    } else if (n - y - 1 == l) {
        result = outside +(x - l) +1*s +1;
        debug = 2;
    }

    return result;
}

let n, t;
r.on('line', function (line) {
    if (!n) {
        let input = line.split(' ');
        n = parseInt(input[0]);
        t = parseInt(input[1]);
        return;
    }

    let [ y, x ] = line.split(' ').map(v => parseInt(v));
    
    console.log(solve(n, x - 1, y - 1).toString());
});

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED

Test 3

Group: 3

Verdict: WRONG ANSWER