蓝桥杯打卡第6天(今天做了3道题，最后一题太难，臣妾做不到啊，┭┮﹏┭┮)

[木杉]

1.星期计算

#include <iostream>
using namespace std;
int main()
{
  int res = 1;
  for(int i = 1; i <= 22; i ++)
    res = (res % 7) * (22 % 7) % 7;
  cout << res + 6 << endl;
  return 0;
}

2.考勤刷卡

#include <iostream>
#include <algorithm>
using namespace std;
const int N = 10010;
int a[N];
int main()
{
  int n;
  scanf("%d", &n);
  for(int i = 0; i < n; i ++)
  {
    char str[10];
    int num;
    scanf("%s%d", str, &num);
    a[i] = num;
  }
  sort(a, a + n);
  int p = 0;
  for(int i = 0; i < n; i ++)
  {
    if(a[i] == p) continue;
    else  printf("%d\n", a[i]);
    p = a[i];
  }
  return 0;
}

3. 卡片

#include <iostream>
using namespace std;
const int N = 10e5;
int a[N];
int main()
{
  int n;
  cin >> n;
  for(int i = 1; i < N; i ++)
  {
    a[i] = a[i - 1] + i;
    if(n <= a[i])
    {
      cout << i << endl;
      break;
    }
  }
  return 0;
}