BOJ / 1292번 / 쉽게 푸는 문제 [Go][Python3]

👩🏻‍💻 문제

1292번: 쉽게 푸는 문제

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✍🏻 풀이

🎨 Go

// https://www.acmicpc.net/problem/1292
package main

import (
	"bufio"
	"fmt"
	"os"
)

func main() {
	reader := bufio.NewReader(os.Stdin)
	writer := bufio.NewWriter(os.Stdout)
	defer writer.Flush()

	var a, b int
	fmt.Fscanln(reader, &a, &b)
	sequence := make([]int, b)
	num := 1
	index := 0
	for index < b {
		j := 0
		for ; j < num && j < b-index; j++ {
			sequence[index+j] = num
		}
		num++
		index += j
	}
	var result int
	for i := a - 1; i < b; i++ {
		result += sequence[i]
	}
	fmt.Fprintln(writer, result)
}

🎨 Python3

# https://www.acmicpc.net/problem/1292
import sys

if __name__ == "__main__":
    a, b = list(map(int, sys.stdin.readline().split()))
    sequence = []
    num = 1
    index = 0
    while index < b:
        j = 0
        while j < num and j < b-index:
            sequence.append(num)
            j += 1
        num += 1
        index += j
    result = 0
    for i in range(a-1, b):
        result += sequence[i]
    print(result)