21. 寻找最富裕的小家庭

const readline = require('readline');
const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
});

let inputs = [];
rl.on('line', function(str)) {
    inputs.push(str);
}
rl.on('close', function() {
    const N = parseInt(inputs[0]);
    const wealth = input[1].split(' ').map(Number);
    wealth.unshift(0);
    const familyWealth = [...wealth];
    let maxWealth = wealth[1];
    for(let i=2; i<N+1; i++) {
        const [N1, N2] = input[i].split(' ').map(Number);
        familyWealth[N1] += wealth[N2];
        maxWealth = Math.max(maxWealth, familyWealth[N1]);
    }
    console.log(maxWealth);
});