boj)1654 - 랜선 자르기
2020. 11. 17. 17:31ㆍPS/boj
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import java.io.*;
import java.util.*;
public class boj_1654 {
static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
static StringTokenizer st;
static long[] len;
static int k, n;
public static void main(String[] args) throws IOException {
st = new StringTokenizer(br.readLine());
k = Integer.parseInt(st.nextToken());
n = Integer.parseInt(st.nextToken());
len = new long[k];
for (int i = 0; i < k; i++) {
len[i] = Integer.parseInt(br.readLine());
}
Arrays.sort(len);
long left = 1;
long right = len[len.length-1];
long ans = 0;
while (left <= right) {
long mid = (left + right) / 2;
long cnt = 0;
for (int i = 0; i < k; i++) {
cnt += len[i] / mid;
}
if (cnt >= n) {
ans = Math.max(mid, ans);
left = mid + 1;
} else {
right = mid - 1;
}
}
System.out.println(ans);
}
}
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cs |
- 이분탐색
- 아 이분탐색인거 알았는데 끝까지 해결 못했다...
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