【Codeforces 1B】Spreadsheets

【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());
		}
	}
}