hdu 4941 stl的map<node,int>用法

#include<iostream>
#include<cstdio>
#include<cstring>
#include<map>
using namespace std;
typedef struct node{
    int x,y;
    bool operator<(const node &b)const
    {
        if(x==b.x)
            return y<b.y;
        else
            return x<b.x;
    }
}node;
int main() {
   map<node,int>ma;
   map<int,int>f,ff;
   node e;
   int n,m,i,j,k,t,id,idd,ss,s,num=0;
   scanf("%d",&t);
   while(t--) {
    scanf("%d%d%d",&n,&m,&k);
    id=0;idd=0;
    while(k--) {
        scanf("%d%d%d",&i,&j,&s);
        if(f[i]==0)
            f[i]=++id;
            if(ff[j]==0)
            ff[j]=++idd;
            e.x=f[i];
            e.y=ff[j];
            ma[e]=s;
    }
    scanf("%d",&j);
  printf("Case #%d:
",++num);
    while(j--) {
        scanf("%d",&i);
        if(i==1) {
            scanf("%d%d",&id,&idd);
            ss=f[id];
            f[id]=f[idd];
            f[idd]=ss;
        }
        if(i==2) {
            scanf("%d%d",&id,&idd);
            ss=ff[id];
            ff[id]=ff[idd];
            ff[idd]=ss;
        }
        if(i==3) {
            scanf("%d%d",&id,&idd);
            e.x=f[id];
            e.y=ff[idd];
          //  printf("%d %d
",f[id],ff[idd]);
            printf("%d
",ma[e]);
        }
    }
   }
return 0;
}