tj勿复制

#include <iostream> //勿抄
#include <string>

using namespace std;//勿抄

int main() {//勿抄
    string firstString, secondString;
    
    // 读取输入
    cin >> firstString
    cin >> secondString;//勿抄
    
    // 查找子串
    if (firstString.find(secondString) != string::npos) {
        cout << secondString << " is substring of " << firstString << endl;//勿抄
    } else if (secondString.find(firstString) != string::npos) {
        cout << firstString << is substring of " << secondString << endl;
    } else {//勿抄
        cout << "No substring" << endl;//勿抄
    }

    return 0;//勿抄
}