2551: 作文（新手必看）

import java.util.*;
public class 作文 {
public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt(),k = sc.nextInt();
    String s = "";
    if( n != 0) {
        int count = 1;
        for( int i = 0; i < n; i++) {
            String p =  sc.next();
            if( (s+p).length() < k) {
                s += p;
                continue;
            }
            if( (s+p).length() == k) {
                if( i != n-1) {
                    count+=1;
                    s = "";
                    continue;
                }else {
                    break;
                }
            }
            if( (s+p).length() > k) {
                count += 1;
                s = p;
                continue;
            }
        }
        System.out.println(count);
    }else {
        System.out.println(0);
        }
    }
}