[PAT解题报告] Password

#include <cstdio>
#include <cstring>
#include <string>
using namespace std;

pair<string,string> a[1002];
char team[22],s[22],p[22];
void modify() {
    strcpy(p, s);
    for (int i = 0; p[i]; ++i) {
        switch(p[i]) {
        case '1':
            p[i] = '@';
            break;
        case '0':
            p[i] = '%';
            break;
        case 'l':
            p[i] = 'L';
            break;
        case 'O':
            p[i] = 'o';
        }
    }
    
}

int main() {
int n, m = 0;
    scanf("%d",&n);
    for (int i = 0; i < n; ++i) {
        scanf("%s%s",team, s);
        modify();
        if (strcmp(p, s)) {
            a[m++] = make_pair((string) team, (string) p);
        }
    }
    if (m) {
        printf("%d\n",m);
        for (int i = 0; i < m; ++i) {
            printf("%s %s\n",a[i].first.c_str(), a[i].second.c_str());
        }
    }
    else {
        if (n == 1) {
            puts("There is 1 account and no account is modified");
        }
        else {
            printf("There are %d accounts and no account is modified\n",n);
        }
    }
    return 0;
}