考试---订错2--3

#include<iostream>
#include<string.h>
#include<math.h>
#include<stdio.h>
#include<algorithm>
#include<map>
using namespace std;
int n,m;
map<string,string>name;
map<string,string>id;
int main()
{   
    //freopen("greet.in","r",stdin);
    //freopen("greet.out","w",stdout);
    int i,j,f=0;
    string  b,d,c;
    cin>>n>>m;
    for(i=1;i<=n;i++)
    {
        cin>>d>>b;
        name[d]=b;
        id[b]=d;    
    }
    /*for(i=1;i<=n;i++)
    {
       cout<<a[i].name<<a[i].id;    
    }*/
    for(i=1;i<=m;i++)
    {
       b.clear();
       cin>>b;
       if(name[b]==c&&id[b]==c) cout<<"ERROR"<<endl;
       else if(name[b]==c) cout<<id[b]<<endl;
       else  cout<<name[b]<<endl;
           
    }
    return 0;
}

用string做的小傻子双重循环爆了 ( 2*10^4)一层-------只拿了40分

#include<bits/stdc++.h>
using namespace std;
int n,m;
map<string,string>Name;
map<string,string>ID;
int main()
{
    //freopen("greet.in","r",stdin);
    //freopen("greet.out","w",stdout);
    cin>>n>>m;
    for(int i=1;i<=n;i++)
    {
        string a,b;
        cin>>a>>b;
        Name[a]=b;
        ID[b]=a;
    }
    for(int i=1;i<=m;i++)
    {
        string a;
        cin>>a;
        string b;
        b.clear();
        cout<<b<<endl;
        if(Name[a]==b&&ID[a]==b)cout<<"ERROR"<<endl;
        else if(Name[a]==b)cout<<ID[a]<<endl;
        else cout<<Name[a]<<endl;
    }
    return 0;
}