题解 | #合并表记录#
合并表记录
http://www.nowcoder.com/practice/de044e89123f4a7482bd2b214a685201
const count = readline()
const map = {}
while(line = readline()){
const [key, val] = line.split(' ')
map[key] = (map[key] || 0) + +val
}
Object.entries(map).forEach(([key, val]) => print(key + ' ' + val))
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