【Codeforces 1B】Spreadsheets

标签：als   com   main   try   substring   NPU   int   字符串   stringbu   

【链接】 我是链接,点我呀:)
【题意】

A~Z分别对应了1~26
AA是27依次类推
让你完成双向的转换

【题解】

转换方法说实话特别恶心>_<
int转string
得像数位DP一样一位一位地确定每一位是啥.
具体的
1位数可以表示16个数字
2位数又可以表示16*16个数字
根据这个算出来int对应的字符串是多少位数的
然后再一点一点地试出来每一位是多少即可

【代码】

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

public class Main {
    
    
    static InputReader in;
    static PrintWriter out;
        
    public static void main(String[] args) throws IOException{
        //InputStream ins = new FileInputStream("E:\\rush.txt");
        InputStream ins = System.in;
        in = new InputReader(ins);
        out = new PrintWriter(System.out);
        //code start from here      
        new Task().solve(in, out);
        out.close();
    }
    
    static int N = (int)1e6;
    static class Task{
        
        boolean isdigit(char key) {
            if (key>='0' && key<='9') return true;
            else return false;
        }
        
        int strtoint(String s) {
            int temp = 1;
            int cur = 0;
            int len = s.length();
            for (int i = len-1;i >= 0;i--) {
                cur = cur + temp*(s.charAt(i)-'A'+1);
                temp = temp*26;
            }
            return cur;
        }
        
        String inttostr(int col) {
            StringBuilder sb = new StringBuilder();
            int cur = 26;
            int cnt = 1;
            while (col>cur) {
                col-=cur;
                cur = cur*26;
                cnt++;
            }
            for (int i = 1;i <= cnt;i++) {
                for (int j = 26;j>=1;j--)
                    if ((j-1)*(cur/26)<col) {
                        col-=(j-1)*cur/26;
                        char key = (char)(j+'A'-1);
                        sb = sb.append(key);
                        cur/=26;
                        break;
                    }
            }
            return sb.toString();
        }
        
        public void solve(InputReader in,PrintWriter out) {
            int n;
            n = in.nextInt();
            int []num = new int[2];
            for (int i = 1;i <= n;i++) {
                String s = in.next();
                int cnt = 0;
                int len = s.length();
                int fir = 0;
                for (int j = 0;j < len;j++) {
                    if (isdigit(s.charAt(j))) {
                        int k = j;
                        fir = j;
                        while (k+1<len && isdigit(s.charAt(k+1)) ) k++;
                        //j..k全是数字
                        int temp = 0;
                        for (int l = j;l <= k;l++)
                            temp = temp*10+s.charAt(l)-'0';                     
                        num[cnt++] = temp;
                        j = k;
                    }
                }
                if (cnt==1) {
                    //AB12
                    int rows = num[0];
                    int col = strtoint(s.substring(0, fir));
                    out.println("R"+rows+"C"+col);
                }else {
                    int rows = num[0];int cols = num[1];
                    String strcols = inttostr(cols);
                    out.println(strcols+rows);
                }
            }
        }
    }

    

    static class InputReader{
        public BufferedReader br;
        public StringTokenizer tokenizer;
        
        public InputReader(InputStream ins) {
            br = new BufferedReader(new InputStreamReader(ins));
            tokenizer = null;
        }
        
        public String next(){
            while (tokenizer==null || !tokenizer.hasMoreTokens()) {
                try {
                tokenizer = new StringTokenizer(br.readLine());
                }catch(IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }
        
        public int nextInt() {
            return Integer.parseInt(next());
        }
    }
}

【Codeforces 1B】Spreadsheets

标签：als   com   main   try   substring   NPU   int   字符串   stringbu   

原文地址：https://www.cnblogs.com/AWCXV/p/10363519.html