(SPOJ) 20007 - Receita de Bolo - Solução

import java.io.*;
import java.util.*;

class Main {
    public static void main(String[] args) throws NumberFormatException, IOException {
        Main processando = new Main();
        processando.processa();
       
        System.exit(0);
    }
   
    static int leitor(BufferedReader br) throws NumberFormatException, IOException {
        int n;
        int resp = 0;
        
        while (true) {
            n = br.read();
            if (n >= '0' && n <= '9') break;
        }
        while (true) {
            resp = resp*10 + n-'0';
            n = br.read();
            if (n < '0' || n > '9') break;
        }
        
        return resp;
    
    }
   
    void processa() throws NumberFormatException, IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
       
        int trigo = leitor(br)/2;
        int ovo = leitor(br)/3;
        int leite = leitor(br)/5;
       
        if (trigo <= ovo && trigo <= leite) {
            bw.write(trigo + "\n");
        }
        else if (ovo <= trigo && ovo <= leite) {
            bw.write(ovo + "\n");
        }
        else if (leite <= ovo && leite <= trigo) {
            bw.write(leite + "\n");
        }
                                  
        bw.flush();
        bw.close();           
        return;
    }
}