yandex solved

const readline = require('readline');

const rl = readline.createInterface({
    input: process.stdin
});

const rast = (p1, p2) => {
    return Math.abs(p2[0] - p1[0]) + Math.abs(p2[1] - p1[1]);
}

let lines = [];
rl.on('line', (line) => {
    lines.push(line);
}).on('close', () => {
    const n = +lines[0];
    const points = lines.slice(1, n+1).map(el => el.split(' ').map(l => +l));
    const k = +lines[n+1];
    const [start, end] = lines[n+2].split(' ').map(el => +el);

    const graph = Array(n).fill(-1).map(el => []);
    for(let i = 0; i < n; i++) {
        for(let j = 0; j < n; j++) {
            if(i == j) continue;
            if(rast(points[i], points[j]) <= k) {
                graph[i].push(j);
                graph[j].push(i);
            }
        }
    }

    let res = -1;
    const visited = Array(n).fill(false);
    const q = [];
    q.push([start-1, 0]);
    while(q.length > 0) {
        const cur = q.shift();
        if(visited[cur[0]])
            continue;
        if(cur[0] == end-1) {
            res = cur[1];
            break;
        }
        graph[cur[0]].forEach(el => q.push([el, cur[1]+1]));
    }

    process.stdout.write(res.toString());
});