B. Spreadsheets

Problem - B - Codeforces

问题描述：excel有两种情况，

• Rr_nCc_n：R行数C列数
• ZZZ(列数)行数。

对这两个进行相互转换。

细节：

• 准确判断这两种情况

string str; cin>>str;
auto posR = str.find("R"), posC = str.find("C");
bool fg = false;
if(isdigit(str[posR+1])) fg = true;
if(fg && posR != -1 && posC != -1 && posR < posC) {// 第一种情况
} else {// 第二种情况
}

• 十进制到26进制（带字母）：注意 ‘A’，‘Z’。

col += ( (cv % 26 == 0 ? 25 : cv % 26 - 1) + 'A');
if(cv % 26 == 0) cv--;
cv /= 26;

AC代码：

#include <iostream>
#include <vector>
#include <string>
#include <cstring>
#include <set>
#include <map>
#include <queue>
#include <ctime>
#include <random>
#include <sstream>
#include <numeric>
#include <stdio.h>
#include <functional>
#include <bitset>
#include <algorithm>
using namespace std;// #define Multiple_groups_of_examples
#define IOS std::cout.tie(0);std::cin.tie(0)->sync_with_stdio(false);
#define dbgnb(a) std::cout << #a << " = " << a << '\n';
#define dbgtt cout<<" !!!test!!! "<<endl;
#define rep(i,x,n) for(int i = x; i <= n; i++)#define all(x) (x).begin(),(x).end()
#define pb push_back
#define vf first
#define vs secondtypedef long long LL;
typedef pair<int,int> PII;const int INF = 0x3f3f3f3f;
const int N = 2e5 + 21;void inpfile();
void solve() {int n; cin>>n;while(n--) {string str; cin>>str;auto posR = str.find("R"), posC = str.find("C");bool fg = false;if(isdigit(str[posR+1])) fg = true;if(fg && posR != -1 && posC != -1 && posR < posC) {// R ... C ...int rv = 0, cv = 0;posR++;while(isdigit(str[posR])) {rv = rv * 10 + str[posR] - '0';posR++;}posR++;while(isdigit(str[posR])) {cv = cv * 10 + str[posR] - '0';posR++;}string col = "";while(cv) {col += ( (cv % 26 == 0 ? 25 : cv % 26 - 1) + 'A');if(cv % 26 == 0) cv--;cv /= 26;}reverse(all(col));cout<<col; cout<<rv<<endl;}  else {int pos = 0;while(isalpha(str[pos])) {pos++;}int rv = 0;string s = "";for(int i = 0; i < pos; ++i) {s += str[i];}int cv = 0;for(int i = 0; i < pos; ++i) {cv = cv * 26 + (s[i] - 'A' + 1);}while(isdigit(str[pos])) {rv = rv * 10 + str[pos] - '0';pos++;}cout<<'R'<<rv<<'C'<<cv<<endl;}}
}
int main()
{#ifdef Multiple_groups_of_examplesint T; cin>>T;while(T--)#endifsolve();return 0;
}
void inpfile() {#define mytest#ifdef mytestfreopen("ANSWER.txt", "w",stdout);#endif
}