HDU1050

 1 #include<iostream>
 2 #include<string.h>
 3 #include<algorithm>
 4 using namespace std;
 5 #define MAX 201
 6 int f(int n){
 7     return (n+1)/2;
 8 }
 9 int a[MAX];
10 int main(){
11     int m,n,x,i,j,t,maxm,times,g;
12     cin>>times;
13     for(g=0;g<times;g++){
14         cin>>x;
15         for(i=0;i<x;i++){
16             cin>>m>>n;
17             if(m>n){
18                 t=m;m=n;n=t;
19             }
20             for(j=f(m);j<=f(n);j++) a[j]++;
21         }
22         maxm=0;
23         for(i=1;i<MAX;i++){
24             if(a[i]>maxm) maxm=a[i];
25         }
26         cout<<10*maxm<<endl;
27         memset(a,0,sizeof(a));
28     }
29     return 0;
30 }