题解 | #合并表记录#

package main

import (
	"fmt"
	"sort"
)

func main() {
	var n int
	fmt.Scan(&n)
	m := make(map[int]int)
	var key []int
	for i := 0; i < n; i++ {
		var a, b int
		fmt.Scan(&a)
		fmt.Scan(&b)
		m[a] += b
	}
	for k := range m {
		key = append(key, k)

	}
	sort.Ints(key)
	for _, v := range key {
		fmt.Println(v, m[v])
	}
}