hdu 4022 Bombing

Bombing

Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65768/65768 K (Java/Others)
Total Submission(s): 2650    Accepted Submission(s):
990

Problem Description

It’s a cruel war which killed millions of people and
ruined series of cities. In order to stop it, let’s bomb the opponent’s
base.
It seems not to be a hard work in circumstances of street battles,
however, you’ll be encountered a much more difficult instance: recounting
exploits of the military. In the bombing action, the commander will dispatch a
group of bombers with weapons having the huge destructive power to destroy all
the targets in a line. Thanks to the outstanding work of our spy, the positions
of all opponents’ bases had been detected and marked on the map, consequently,
the bombing plan will be sent to you.
Specifically, the map is expressed as a
2D-plane with some positions of enemy’s bases marked on. The bombers are
dispatched orderly and each of them will bomb a vertical or horizontal line on
the map. Then your commanded wants you to report that how many bases will be
destroyed by each bomber. Notice that a ruined base will not be taken into
account when calculating the exploits of later bombers.

 

Input

Multiple test cases and each test cases starts with two
non-negative integer N (N<=100,000) and M (M<=100,000) denoting the number
of target bases and the number of scheduled bombers respectively. In the
following N line, there is a pair of integers x and y separated by single space
indicating the coordinate of position of each opponent’s base. The following M
lines describe the bombers, each of them contains two integers c and d where c
is 0 or 1 and d is an integer with absolute value no more than 10⁹,
if c = 0, then this bomber will bomb the line x = d, otherwise y = d. The input
will end when N = M = 0 and the number of test cases is no more than
50.

 

Output

For each test case, output M lines, the ith line
contains a single integer denoting the number of bases that were destroyed by
the corresponding bomber in the input. Output a blank line after each test
case.

 

Sample Input

3 2
1 2
1 3
2 3
0 1
1 3
0 0

 

Sample Output

2
1

 

Source

The
36th ACM/ICPC Asia Regional Shanghai Site —— Online Contest

 

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暑假第二场组队赛，有点惨败。。这是dengyaolong师兄AC代码，贴过来学习一下......  = =有时候暴力真的出奇迹.....

 #include<iostream>
 #include<cstdio>
 #include<string>
 #include<cstring>
 #include<map>
 #include<set>
 #include <algorithm>
 using namespace std;

 int main(){
     int N,M,i,j,x,y;
     while(scanf("%d%d",&N,&M)&&(N||M)){
         map<int,multiset<int> > row;
         map<int,multiset<int> > col;
         for(i=;i<N;i++){
             scanf("%d%d",&x,&y);
             row[x].insert(y);
             col[y].insert(x);
         }
         for(i=;i<M;i++){
             scanf("%d%d",&x,&y);
             int ans=;
             if(x==){
                 printf("%d\n",row[y].size());
                 for(multiset<int>::iterator itr=row[y].begin();itr!=row[y].end();itr++){
                     col[*itr].erase(y);
                 }
                 row[y].clear();
             }else{
                 printf("%d\n",col[y].size());
                 for(multiset<int>::iterator itr=col[y].begin();itr!=col[y].end();itr++){
                     row[*itr].erase(y);
                 }
                 col[y].clear();

             }

         }
         puts("");

     }

     return ;
 }