1035. Password

#include<list>#include<iostream>#include<string>using namespace std;int main(){  list<string>modi;  int n;cin>>n;  for(int i=0;i<n;++i){    string name,code;  cin>>name>>code;    bool modied=false;    for(auto &x:code)      switch(x){       case '1':x='@';modied=true;break;       case '0':x='%';modied=true;break;       case 'O':x='o';modied=true;break;       case 'l':x='L';modied=true;break; }    if(modied)modi.push_back(name+' '+code);  }  if(modi.empty())    cout<<"There is "<<n<<" account"<<(n==1?"":"s")<<" and no account is modified";    else {      cout<<modi.size()<<endl;      for(auto&x:modi)cout<<x<<endl; }}