Problem Solving/Baekjoon
[백준] 1292 쉽게 푸는 문제 - Implementation / Java
graycode
2024. 8. 29. 14:32
• 문제 링크
https://www.acmicpc.net/problem/1292
• 풀이 코드
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;
public class Main {
public static void main(String[] args) throws IOException {
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
int a = read(), b = read() + 1, k = 1;
int[] arr = new int[b];
for (int i = 1; i < b; i++) for (int j = 0; j < i && k < b; j++) arr[k++] = i;
int sum = 0;
for (int i = a; i < b; i++) sum += arr[i];
bw.write(String.valueOf(sum));
bw.flush();
}
private static int read() throws IOException {
int c, n = System.in.read() & 15;
while ((c = System.in.read()) > 32) n = (n << 3) + (n << 1) + (c & 15);
return n;
}
}