刷题统计= =

 

40%的暴力代码：
 

import java.io.*;
import java.math.BigInteger;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;
import java.util.stream.Collectors;

public class Main
{
    static PrintWriter pw = new PrintWriter(new BufferedWriter(new OutputStreamWriter(System.out)));
    static int N = 100010;
    static List<Character> list = new ArrayList<>();

    public static void main(String[] args) throws NumberFormatException, IOException
    {
        long a = rd.nextLong(),b = rd.nextLong();
        long n = rd.nextLong();

        long cnt = 0; // 记录当前题数
        long res = 0; // 记录天数
        while(cnt < n)
        {
             for(int i = 1; i <= 5 ; i ++)
             {
                 cnt += a;
                 res ++;
                 if(cnt >= n)
                 {
                     pw.println(res);
                     pw.flush();
                     return;
                 }
             }
             for(int i = 1 ; i <= 5 ; i ++)
             {
                 cnt += b;
                 res ++;
                 if(cnt >= n)
                 {
                     pw.println(res);
                     pw.flush();
                     return;
                 }
             }
        }
        pw.flush();
    }
}

class rd
{
    static BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
    static StringTokenizer tokenizer = new StringTokenizer("");

    static String nextLine() throws IOException { return reader.readLine(); }
    static String next() throws IOException
    {
        while(!tokenizer.hasMoreTokens())  tokenizer = new StringTokenizer(reader.readLine());
        return tokenizer.nextToken();
    }
    static int nextInt() throws IOException { return Integer.parseInt(next()); }
    static double nextDouble() throws IOException { return Double.parseDouble(next()); }
    static long nextLong() throws IOException { return Long.parseLong(next()); }
    static BigInteger nextBigInteger() throws IOException
    {
        BigInteger d = new BigInteger(rd.nextLine());
        return d;
    }
}

class PII implements Comparable<PII>
{
    int x,y;
    public PII(int x ,int y)
    {
        this.x = x;
        this.y = y;
    }
    public int compareTo(PII a)
    {
        if(this.x-a.x != 0)
            return this.x-a.x;  //按x升序排序
        else return this.y-a.y;  //如果x相同，按y升序排序
    }
}

class Edge
{
    int a,b,c;
    public Edge(int a ,int b, int c)
    {
        this.a = a;
        this.b = b;
        this.c = c;
    }
}