1035 Password （20 分）（字符串）

#include<bits/stdc++.h>

using namespace std;
pair<string,string>pa;
int main()
{
    int n;
    scanf("%d",&n);

    vector<pair<string,string> >vec;
    for(int i=0;i<n;i++){
        char a[20],b[20];
        scanf("%s %s",a,b);
        bool flag=false;
        for(int j=0;b[j];j++){
            if(b[j]=='l'){
                b[j]='L';
                flag=true;
            }
            else if(b[j]=='1'){
                b[j]='@';
                flag=true;
            }
            else if(b[j]=='0'){
                b[j]='%';
                flag=true;
            }
            else if(b[j]=='O'){
                b[j]='o';
                flag=true;
            }
        }
        if(flag) vec.push_back(make_pair(a,b));
    }
    if(vec.size()==0){
        if(n==1) printf("There is %d account and no account is modifiedn",n);
        else printf("There are %d accounts and no account is modifiedn",n);
    }

    else{
        printf("%dn",vec.size());
        for(int i=0;i<vec.size();i++){
            cout<<vec[i].first<<" "<<vec[i].second<<endl;
        }
    }
    return 0;
}