HDU 3105 Fred's Lotto Tickets

Description

n行数，一行6个，问这6*n个数里面是不是1~49都出现过

Algorithm

开个布尔数组记录下，然后每次出现就s++,最后看s是不是49

Hint

是Yes 不是 YES，搞得WA了一次

Code

#include <iostream>
using namespace std;
int n;
void solve()
{
  bool b[50] = {false};
  int s = 0;
  for (int i = 0; i < n; i++)
    for (int j = 0; j < 6; j++)
    {
      int x;
      cin >> x;
      if (!b[x])
      {
        b[x] = true;
        s++;
      }
    }
  if (s == 49) cout << "Yes" << endl; else cout << "No" << endl;
}
int main()
{
  for (;;)
  {
    cin >> n;
    if (n == 0) break;
    solve();
  }
}