简单题

#include 
      
        #include 
       
         #include 
        
          #include 
         
           using namespace std; #define maxn 30 #define maxl 1005 bool f[maxn][maxl]; int n; void input() {
        memset(f, 0, sizeof(f));     scanf("%d", &n); for (int i = 0; i < n; i++)     {
    char st[4]; int a, b;         scanf("%s", st);         scanf("%d%d", &a, &b); for (int j = a; j < b; j++)             f[st[0] - 'A'][j] = true;     } } void work() {
    for (int i = 0; i < 1000; i++)     {
    int x = 0; for (int j = 0; j < 26; j++)             x += f[j][i]; if (x == 0) continue;         putchar('A' + x - 1);     }     putchar('\n'); } int main() {
    //freopen("t.txt", "r", stdin);     int t;     scanf("%d", &t); while (t--)     {
            input();         work();     } return 0; }