[BOJ][1934] 최소공배수
Updated:
1. 문제 링크
https://www.acmicpc.net/problem/1934
2. 사용 알고리즘
유클리드 호제법
3. 풀이
유클리드 호제법을 이용하여 최대공약수를 구한 후 최소공배수 계산
LCM = A * B / GCD
4. 소스 코드
4-1. C++
https://github.com/dev-aiden/problem-solving/blob/main/boj/1934.cpp
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#include <iostream>
using namespace std;
int gcd(int a, int b) {
while (b != 0) {
int r = a % b;
a = b;
b = r;
}
return a;
}
int lcm(int a, int b) {
return a * b / gcd(a, b);
}
int main(void) {
ios_base::sync_with_stdio(false);
int t; for (cin >> t; t--;) {
int a, b; cin >> a >> b;
cout << lcm(a, b) << "\n";
}
return 0;
}
4-2. JAVA
https://github.com/dev-aiden/problem-solving/blob/main/boj/1934.java
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import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;
public class Main {
public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
StringBuilder sb = new StringBuilder();
int t = Integer.parseInt(br.readLine());
for(int i = 0; i < t; ++i) {
StringTokenizer st = new StringTokenizer(br.readLine());
int a = Integer.parseInt(st.nextToken());
int b = Integer.parseInt(st.nextToken());
sb.append(lcm(a, b)).append("\n");
}
System.out.println(sb);
}
public static int gcd(int a, int b) {
while (b != 0) {
int r = a % b;
a = b;
b = r;
}
return a;
}
public static int lcm(int a, int b) {
return a * b / gcd(a, b);
}
}
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