c++

#include<bits/stdc++.h>
int main(int argc, char **argv){
    std::string input_str;

    int bytes;
    while(std::cin>>input_str>>bytes){
        int continue_byte = 0;
        std::string output_str;
        for (int i = 0; i < bytes; ++i) {
            if(input_str[i]>0 && input_str[i] <255)//非中文字符的ASCII码的范围
            {
                continue_byte = 0;
            }
            else{
                continue_byte++;
            }
            output_str.push_back(input_str[i]);

        }
        while(continue_byte--){
            output_str.pop_back();
        }
        std::cout<<output_str<<std::endl;
    }

}