49. API集群负载统计

const readline = require('readline');
const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
});
let lines = [];
rl.on('line', function(line) {
    lines.push(line);
});
let map={};
rl.on('close', () => {
    let N = parseInt(lines[0]);
    for(let i=1; i<=N; i++) {
        let parts = lines[i].split('/');
        for(let j=1; j<parts.length; j++) {
            let key = j.toString() + '-' + parts[j];
            map[key] = (map[key] || 0) + 1;
        }
    }
    let [L, keyword] = lines[N + 1].split(' ');
    console.log(map[L + '-' + keyword] || 0);
})