POJ 2894

 #include<iostream>
 #define MAXN 1005
 using namespace std;

 int a[MAXN];

 int main()
 {
     //freopen("acm.acm","r",stdin);
     int test;
     int num;
     char c;
     int i;
     int j;
     int x;
     int max;
     int y;
     cin>>test;
     while(test --)
     {
         memset(a,,sizeof(a));
         cin>>num;
         max = -;
         for(i = ; i < num; ++ i)
         {
             cin>>c;
             cin>>x>>y;
             if(x > max)
                 max = x;
             if(y > max)
                 max = y;
             for(j = x; j < y; ++ j)
             {
                 ++ a[j];
             }
         }
         for(i = ; i < max; ++ i)
         {
             if(a[i] == )
                 continue;
             else
                 cout<<char(a[i]-+);
         }
         cout<<endl;
     }
 }