In the popular spreadsheets systems for example in Excel the following numeration of columns is used The first column has number A the second — number B etc till column 26 that is marked by Z Then the

#include #include #include

using namespace std;

string toExcelColumn(int col) { string result = ""; while (col > 0) { int rem = (col - 1) % 26; result = char('A' + rem) + result; col = (col - 1) / 26; } return result; }

pair<int, int> fromExcelColumn(const string& col) { int result = 0; int multiplier = 1; for (int i = col.length() - 1; i >= 0; i--) { result += (col[i] - 'A' + 1) * multiplier; multiplier *= 26; } return make_pair(result, 0); }

string toRXCY(int row, int col) { return "R" + to_string(row) + "C" + to_string(col); }

pair<int, int> fromRXCY(const string& cell) { int r_pos = cell.find('R'); int c_pos = cell.find('C'); int row = stoi(cell.substr(r_pos + 1, c_pos - r_pos - 1)); int col = stoi(cell.substr(c_pos + 1)); return make_pair(row, col); }

int main() { int n; cin >> n; vector coordinates(n); for (int i = 0; i < n; i++) { cin >> coordinates[i]; }

for (int i = 0; i < n; i++) {
    if (coordinates[i][0] == 'R' && isdigit(coordinates[i][1])) {
        pair<int, int> cell = fromRXCY(coordinates[i]);
        cout << toExcelColumn(cell.second) << cell.first << endl;
    } else {
        pair<int, int> cell = fromExcelColumn(coordinates[i]);
        cout << toRXCY(cell.second, cell.first) << endl;
    }
}

return 0;