#include <iostream>
#include <string>
#include <regex>
#include <vector>
using namespace std;
int main() {
    vector<string> inputs;
    vector<string> outputs;
    regex re("([abc]?)\\s*(\\d+)\\s*(\\d+)?");
    smatch match;
    int n;cin>>n;cin.ignore();
    for (int i = 0; i < n; i++) {
        string s;
        getline(cin, s);
        inputs.push_back(s);
    }
    for (const auto& s : inputs) {
        if (regex_match(s, match, re)) {
            char e = match[1].str().empty() ? 'a' : match[1].str()[0];
            int op1 = stoi(match[2]);
            int op2 = match[3].matched ? stoi(match[3]) : op1;
            int result;
            string str;
            switch (e) {
                case 'a':
                    result = op1 + op2;
                    str = to_string(op1) + "+" + to_string(op2) + "=" + to_string(result);
                    break;
                case 'b':
                    result = op1 - op2;
                    str = to_string(op1) + "-" + to_string(op2) + "=" + to_string(result);
                    break;
                case 'c':
                    result = op1 * op2;
                    str = to_string(op1) + "*" + to_string(op2) + "=" + to_string(result);
                    break;
            }
            outputs.push_back(str);
            outputs.push_back(to_string(str.length()));
        }
    }
    for (const auto& output : outputs) {
        cout << output << endl;
    }
    return 0;
}

本地可以过洛谷Wrong Answer.wrong answer Too short on line 1.