Baekjoon 11659 : 구간 합 구하기

문제

https://www.acmicpc.net/problem/11659

문제풀이

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

public class baekjoon11659 {
    public static void main(String arg[]) throws IOException {
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer stringTokenizer = new StringTokenizer(bufferedReader.readLine());

        int suNo = Integer.parseInt(stringTokenizer.nextToken());
        int quizNo = Integer.parseInt(stringTokenizer.nextToken());
        long[] S = new long[suNo + 1];

        stringTokenizer = new StringTokenizer(bufferedReader.readLine());
        for (int i = 1; i <= suNo; i++) {
            S[i] = S[i - 1] + Integer.parseInt(stringTokenizer.nextToken());
        }

        for (int q = 0; q < quizNo; q++) {
            stringTokenizer = new StringTokenizer(bufferedReader.readLine());
            int i = Integer.parseInt(stringTokenizer.nextToken());
            int j = Integer.parseInt(stringTokenizer.nextToken());

            System.out.println(S[j] - S[i - 1]);
        }
    }
}