package main import "fmt" import "sort" func main(){ var n int fmt.Scan(&n) store := make(map[int]int,0) for i:=0;i<n;i++{ var w,v int fmt.Scan(&w,&v) if _,ok := store[w];ok{ store[w] = store[w] + v }else { store[w] = v } } keys := make([]int, 0, len(store)) for k,_ := range store {...