题目
描述
数据表记录包含表索引index和数值value(int范围的正整数),请对表索引相同的记录进行合并,即将相同索引的数值进行求和运算,输出按照index值升序进行输出。
提示:
0 <= index <= 11111111
1 <= value <= 100000
输入描述:
先输入键值对的个数n(1 <= n <= 500)
接下来n行每行输入成对的index和value值,以空格隔开
输出描述:
输出合并后的键值对(多行)
代码
const rl = require("readline").createInterface({
input: process.stdin });
var iter = rl[Symbol.asyncIterator]();
const readline = async () => (await iter.next()).value;
void async function () {
// Write your code here
while(line = await readline()){
let length = parseInt(line);
let obj = {
};
for (let i = 0; i < length; i++) {
let [k,v] = (await readline()).split(" ");
if (obj[k]) {
obj[k] += parseInt(v);
} else {
obj[k] = parseInt(v)
}
}
for (const key in obj) {
console.log(key + " " + obj[key]);
}
}
}()